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84330983 | 10.1007/JHEP11(2017)005 | A global $U(1)_\text{PQ}$ symmetry is protected from gravitational effects in
the s-confining $SU(N)^k$ product group theory with $A+4Q +N\overline{Q}$
matter. If the $SU(4)$ family symmetry is gauged and an appropriate tree-level
superpotential is added, then the dynamically generated superpotential
spontaneously breaks $SU(4)\times U(1)_\text{PQ} \rightarrow SU(3)_c$ and
produces a QCD axion. Small values of the $CP$-violating $\theta$ parameter are
then possible without any fine-tuning, as long as the product group is suitably
large. By introducing a second copy of the s-confining $SU(N)$ product group
also coupled to the gauged $SU(4)$, we find that values as small as $N=7$ are
consistent with $\bar\theta<10^{-10}$, even under the pessimistic assumption
that the dominant contribution to the axion quality is at tree level.Comment: 16 pages, 3 figures, 4 tables, 2 appendice | A Composite Axion from a Supersymmetric Product Group | a composite axion from a supersymmetric product group | protected gravitational confining overline matter. gauged superpotential dynamically superpotential spontaneously breaks rightarrow produces axion. violating theta fine tuning suitably large. introducing copy confining gauged theta pessimistic axion pages tables appendice | non_dup | [] |
93944434 | 10.1007/JHEP11(2017)006 | Visible-sector SUSY-breaking effects are computed in terms of hidden-sector
correlation functions for generic holomorphic scalar portals. The solutions,
which are valid irrespective of the hidden-sector dynamics, are approximated
with the help of the operator product expansion (OPE). Indeed, for theories
with superconformal symmetry at high energy, the superconformal OPE formalism
can be used to disentangle the high-energy dynamics, encoded in the OPE
coefficients, from the low-energy dynamics of the SUSY-breaking vacuum
expectation values. A systematic method is proposed to compute the OPE
coefficients, using relations between correlation functions of superfields and
correlation functions of their quasi-primary component fields. The method,
which is quite general, could be useful in building models of gauge- or
gravity-mediated SUSY breaking and in analysing the viability of such models in
a systematic way.Comment: 1+22 pages, 1 figure, minor correction | Holomorphic Scalar Portals and the OPE | holomorphic scalar portals and the ope | visible susy breaking hidden generic holomorphic portals. valid irrespective hidden approximated superconformal superconformal formalism disentangle encoded susy breaking expectation values. superfields quasi fields. susy breaking analysing viability pages minor | non_dup | [] |
93954709 | 10.1007/JHEP11(2017)007 | We point out that recent Verlinde's proposal of emergent gravity suffers from
some internal inconsistencies. The main idea in this proposal is to preserve
general relativity at short scales where numerous tests verified its validity,
but modify it on large scales where we meet puzzles raised by observations (in
particular dark matter), by using some entropic concepts. We first point out
that gravity as a conservative force is very difficult (if possible at all) to
portray as an entropic force. We then show that the derivation of the MOND
relation using the elastic strain idea is not self-consistent. When properly
done, Verlinde's elaborate procedure recovers the standard Newtonian gravity
instead of MOND.Comment: accepted for publication in JHE | Inconsistencies in Verlinde's emergent gravity | inconsistencies in verlinde's emergent gravity | verlinde proposal emergent suffers inconsistencies. proposal preserve relativity numerous verified validity modify meet puzzles raised entropic concepts. conservative portray entropic force. derivation mond elastic consistent. properly verlinde elaborate recovers newtonian publication | non_dup | [] |
86415352 | 10.1007/JHEP11(2017)008 | Models with extended Higgs sectors can contain several additional Higgs
states, heavier or lighter than the SM Higgs boson. The couplings of lighter
extra states to SM particles can be strongly reduced, leading to small cross
sections for their direct production. Heavier extra states can have larger
couplings to SM particles and, moreover, have large branching fractions into
lighter extra states, notably into a SM-like Higgs boson accompagnied by
another Higgs state which can be lighter or heavier than 125$\sim$GeV.
Motivated by corresponding scenarios in the NMSSM we study the prospects for
the discovery or exclusion of cascade decays $ggF \to H_3 \to H_2 + H_1$ in the
$b\bar{b}b\bar{b}$, $b\bar{b}\tau\tau$ and $b\bar{b}\gamma\gamma$ final states
where either $H_1$ or $H_2$ can be SM-like. Significant regions of the NMSSM
parameter space can be tested by these searches. These are, however, not
confined to models of the NMSSM type.Comment: 34 pages, 64 figures, explanations, figures and reference added, to
appear in JHE | Simultaneous Search for Extra Light and Heavy Higgs Bosons via Cascade
Decays | simultaneous search for extra light and heavy higgs bosons via cascade decays | sectors heavier lighter boson. couplings lighter extra production. heavier extra couplings branching fractions lighter extra notably boson accompagnied lighter heavier gev. motivated scenarios nmssm prospects discovery exclusion cascade decays gamma gamma like. nmssm searches. confined nmssm pages explanations | non_dup | [] |
86418424 | 10.1007/JHEP11(2017)009 | Where collider searches for resonant invisible particles loose steam, dark
sectors might leave their trace as virtual effects in precision observables.
Here we explore this option in the framework of Higgs portal models, where a
sector of dark fermions interacts with the standard model through a strong
renormalizable coupling to the Higgs boson. We show that precise measurements
of Higgs-gauge and triple Higgs interactions can probe dark fermions up to the
TeV scale through virtual corrections. Observation prospects at the LHC and
future lepton colliders are discussed for the so-called singlet-doublet model
of Majorana fermions, a generalization of the bino-higgsino scenario in
supersymmetry. We advocate a two-fold search strategy for dark sectors through
direct and indirect observables.Comment: 20 pages, 7 figures, 1 tabl | Virtual signatures of dark sectors in Higgs couplings | virtual signatures of dark sectors in higgs couplings | collider searches resonant invisible loose steam sectors leave trace virtual precision observables. explore option portal fermions interacts renormalizable boson. precise triple fermions virtual corrections. prospects lepton colliders singlet doublet majorana fermions generalization bino higgsino supersymmetry. advocate sectors indirect pages tabl | non_dup | [] |
86414113 | 10.1007/JHEP11(2017)010 | A search for a light pseudoscalar Higgs boson (A) produced in association
with bottom quarks and decaying into a muon pair is reported. The search uses
19.7 inverse femtobarns of proton-proton collisions at a center-of-mass energy
of 8 TeV, collected by the CMS experiment. No signal is observed in the dimuon
mass range from 25 to 60 GeV. Upper limits on the cross section times branching
fraction, sigma(pp to b bbar A) B(A to mu mu), are set.Comment: Replaced with the published version. Added the journal reference and
DOI. All the figures and tables can be found at
http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-15-009
(CMS Public Pages | Search for a light pseudoscalar Higgs boson produced in association with
bottom quarks in pp collisions at sqrt(s) = 8 TeV | search for a light pseudoscalar higgs boson produced in association with bottom quarks in pp collisions at sqrt(s) = 8 tev | pseudoscalar boson quarks decaying muon reported. femtobarns proton proton collisions experiment. dimuon gev. branching sigma bbar replaced version. doi. tables publications pages | non_dup | [] |
93952745 | 10.1007/JHEP11(2017)011 | The issue intensively claimed in the literature on the generation of a
CPT-odd and Lorentz violating Chern-Simons-like term by radiative corrections
owing to a CPT violating interaction -- the axial coupling of fermions with a
constant vector field $b_\m$ -- is mistaken. The presence of massless gauge
field triggers IR divergences that might show up from the UV subtractions,
therefore, so as to deal with the (actual physical) IR divergences, the
Lowenstein-Zimmermann subtraction scheme, in the framework of BPHZL
renormalization method, has to be adopted. The proof on the non generation of
such a Chern-Simons-like term is done, independent of any kind of
regularization scheme, at all orders in perturbation theory.Comment: In honor of Prof. Manfred Schweda (1939-2017). Work presented at the
XXXVIII National Meeting on Particle Physics and Fields, September 18-22,
2017 - Passa Quatro - Minas Gerais - Brazil. Reference [46] correcte | No radiative generation of Chern-Simons-like term in Lorentz-violating
QED: dealing with IR divergences | no radiative generation of chern-simons-like term in lorentz-violating qed: dealing with ir divergences | intensively claimed lorentz violating chern simons radiative owing violating axial fermions mistaken. massless triggers divergences subtractions deal divergences lowenstein zimmermann subtraction bphzl renormalization adopted. chern simons kind regularization orders perturbation honor prof. manfred schweda xxxviii meeting september passa quatro minas gerais brazil. correcte | non_dup | [] |
93942517 | 10.1007/JHEP11(2017)014 | Poisson-Lie dualising the eta deformation of the G/H symmetric space sigma
model with respect to the simple Lie group G is conjectured to give an analytic
continuation of the associated lambda deformed model. In this paper we
investigate when the eta deformed model can be dualised with respect to a
subgroup G_0 of G. Starting from the first-order action on the complexified
group and integrating out the degrees of freedom associated to different
subalgebras, we find it is possible to dualise when G_0 is associated to a
sub-Dynkin diagram. Additional U_1 factors built from the remaining Cartan
generators can also be included. The resulting construction unifies both the
Poisson-Lie dual with respect to G and the complete abelian dual of the eta
deformation in a single framework, with the integrated algebras unimodular in
both cases. We speculate that extending these results to the path integral
formalism may provide an explanation for why the eta deformed AdS_5 x S^5
superstring is not one-loop Weyl invariant, that is the couplings do not solve
the equations of type IIB supergravity, yet its complete abelian dual and the
lambda deformed model are.Comment: 37 pages, v2: minor change | Poisson-Lie duals of the eta deformed symmetric space sigma model | poisson-lie duals of the eta deformed symmetric space sigma model | poisson dualising deformation sigma conjectured analytic continuation lambda deformed model. deformed dualised subgroup complexified integrating freedom subalgebras dualise dynkin diagram. built cartan generators included. unifies poisson abelian deformation algebras unimodular cases. speculate extending formalism explanation deformed superstring weyl couplings solve supergravity abelian lambda deformed pages minor | non_dup | [] |
83868262 | 10.1007/JHEP11(2017)020 | We discuss the only two viable realizations of fermion compositeness
described by a calculable relativistic effective field theory consistent with
unitarity, crossing symmetry and analyticity: chiral-compositeness vs
goldstino-compositeness. We construct the effective theory of $\mathcal{N}$
Goldstini and show how the Standard Model can emerge from this dynamics. We
present new bounds on either type of compositeness, for quarks and leptons,
using dilepton searches at LEP, dijets at the LHC, as well as low-energy
observables and precision measurements. Remarkably, a scale of compositeness
for Goldstino-like electrons in the 2 TeV range is compatible with present
data, and so are Goldstino-like first generation quarks with a compositeness
scale in the 10 TeV range. Moreover, assuming maximal $R$-symmetry,
goldstino-compositeness of both right- and left-handed quarks predicts exotic
spin-1/2 colored sextet particles that are potentially within the reach of the
LHC.Comment: 32 pages on how Thomson might have discovered supersymmetry; v2: few
typos fixed and comments adde | The Other Fermion Compositeness | the other fermion compositeness | viable realizations fermion compositeness calculable relativistic unitarity crossing analyticity chiral compositeness goldstino compositeness. mathcal goldstini emerge dynamics. bounds compositeness quarks leptons dilepton searches dijets observables precision measurements. remarkably compositeness goldstino compatible goldstino quarks compositeness range. maximal goldstino compositeness handed quarks predicts exotic colored sextet potentially pages thomson discovered supersymmetry typos comments adde | non_dup | [] |
93942176 | 10.1007/JHEP11(2017)021 | We examine some recently-constructed families of asymptotically-AdS$_3
\times$S$^3$ supergravity solutions that have the same charges and mass as
supersymmetric D1-D5-P black holes, but that cap off smoothly with no horizon.
These solutions, known as superstrata, are quite complicated, however we show
that, for an infinite family of solutions, the null geodesic problem is
completely integrable, due to the existence of a non-trivial conformal Killing
tensor that provides a quadratic conservation law for null geodesics. This
implies that the massless scalar wave equation is separable. For another
infinite family of solutions, we find that there is a non-trivial conformal
Killing tensor only when the left-moving angular momentum of the massless
scalar is zero. We also show that, for both these families, the metric degrees
of freedom have the form they would take if they arose from a consistent
truncation on S$^3$ down to a (2+1)-dimensional space-time. We discuss some of
the broader consequences of these special properties for the physics of these
black-hole microstate geometries.Comment: 24 pages, 1 figur | Integrability and Black-Hole Microstate Geometries | integrability and black-hole microstate geometries | examine families asymptotically supergravity charges supersymmetric holes smoothly horizon. superstrata complicated infinite geodesic integrable trivial conformal killing quadratic conservation geodesics. massless separable. infinite trivial conformal killing moving massless zero. families freedom arose truncation time. broader consequences microstate pages figur | non_dup | [] |
83857072 | 10.1007/JHEP11(2017)022 | We investigate the present constraints from MINOS and T2K experiments for the
neutrino decay scenario induced by non-diagonal couplings of Majorons to
neutrinos. As novelty, on top of the typical invisible decay prescription, we
add the contribution of visible decay, where final products can be observed.
This new effect depends on the nature of the neutrino - Majoron coupling, which
can be of scalar or pseudoscalar type. Using the combination of disappearance
data from MINOS and disappearance and appearance data from T2K, for normal
ordering, we constrain the decay parameter $\alpha\equiv E\,\Gamma$ for the
heaviest neutrino, where $E$ and $\Gamma$ are the neutrino energy and width,
respectively. We find that when considering visible decay within appearance
data, one can improve current neutrino long-baseline constraints up to $\alpha<
\mathcal{O}(10^{-5})$ eV$^2$, at 90\% C.L., for both kinds of couplings, which
is better by one order of magnitude compared to previous bounds.Comment: 29 pages, 8 figures, 3 appendices; v2: Corrected errors, version
accepted for publication in JHE | Visible neutrino decay in the light of appearance and disappearance long
baseline experiments | visible neutrino decay in the light of appearance and disappearance long baseline experiments | minos diagonal couplings majorons neutrinos. novelty invisible prescription visible observed. majoron pseudoscalar type. disappearance minos disappearance appearance ordering constrain alpha equiv gamma heaviest gamma respectively. visible appearance alpha mathcal c.l. kinds couplings pages appendices corrected publication | non_dup | [] |
93946024 | 10.1007/JHEP11(2017)023 | If super-Yang-Mills theory possesses the exact conformal invariance, there is
an additional modular invariance under the change of the complex bare charge
$\tau = \frac{\theta}{2\pi}+ \frac{4\pi\imath}{g^2}\longrightarrow
-\frac{1}{\tau}$. The low-energy Seiberg-Witten prepotential ${\cal F}(a)$,
however, is not explicitly invariant, because the flat moduli also change $a
\longrightarrow a_D = \partial{\cal F}/\partial a$. In result, the prepotential
is not a modular form and depends also on the anomalous Eisenstein series
$E_2$. This dependence is usually described by the universal MNW modular
anomaly equation. We demonstrate that, in the $6d$ $SU(N)$ theory with {\it
two} independent modular parameters $\tau$ and $\hat \tau$, the modular anomaly
equation changes, because the modular transform of $\tau$ is accompanied by an
($N$-dependent!) shift of $\hat\tau$ and vice versa. This is a new peculiarity
of double-elliptic systems, which deserves further investigation.Comment: 23 page | Modular properties of 6d (DELL) systems | modular properties of 6d (dell) systems | super mills possesses conformal invariance modular invariance bare frac theta frac imath longrightarrow frac seiberg witten prepotential explicitly moduli longrightarrow prepotential modular anomalous eisenstein universal modular anomaly equation. modular modular anomaly modular transform accompanied vice versa. peculiarity elliptic deserves | non_dup | [] |
86421440 | 10.1007/JHEP11(2017)024 | Weakly interacting massive particles are a widely well-probed dark matter
candidate by the dark matter direct detection experiments. Theoretically, there
are a large number of ultraviolet completed models that consist of a weakly
interacting massive particle dark matter. The variety of models makes the
comparison with the direct detection data complicated and often non-trivial. To
overcome this, in the non-relativistic limit, the effective theory was
developed in the literature which works very well to significantly reduce the
complexity of dark matter-nucleon interactions and to better study the nuclear
response functions. In the effective theory framework for a spin-1/2 dark
matter, we combine three independent likelihood functions from the latest
PandaX, LUX, and XENON1T data, and give a joint limit on each effective
coupling. The astrophysical uncertainties of the dark matter distribution are
also included in the likelihood. We further discuss the isospin violating cases
of the interactions. Finally, for both dimension-five and dimension-six
effective theories above the electroweak scale, we give updated limits of the
new physics mass scales.Comment: 33 pages, 11 figures, PandaX run10 data included and version accepted
in JHEP, "code is available at the LikeDM website,
https://likedm.hepforge.org/ | A combined analysis of PandaX, LUX, and XENON1T experiments within the
framework of dark matter effective theory | a combined analysis of pandax, lux, and xenon1t experiments within the framework of dark matter effective theory | weakly interacting massive widely probed candidate experiments. theoretically ultraviolet completed consist weakly interacting massive matter. complicated trivial. overcome relativistic nucleon functions. combine likelihood latest pandax xenon coupling. astrophysical likelihood. isospin violating interactions. electroweak updated pages pandax jhep likedm website | non_dup | [] |
84332027 | 10.1007/JHEP11(2017)026 | Heterotic $M$-theory consists of a five-dimensional manifold of the form
$S^1/\mathbf{Z}_2 \times M_{4}$. It has been shown that one of the two orbifold
planes, the "observable" sector, can have a low energy particle spectrum which
is precisely the $N=1$ supersymmetric standard model with three right-handed
neutrino chiral supermultiplets. The other orbifold plane constitutes a
"hidden" sector which, since its communication with the observable sector is
suppressed, will be ignored in this paper. However, the finite fifth-dimension
allows for the existence of three-brane solitons which, in order to render the
vacuum anomaly free, must appear. That is, heterotic $M$-theory provides a
natural framework for brane-world cosmological scenarios coupled to realistic
particle physics. The complete worldvolume action of such three-branes is
unknown. Here, treating these solitons as probe branes, we construct their
scalar worldvolume Lagrangian as a derivative expansion of the heterotic DBI
action. In analogy with similar calculations in the $M_{5}$ and $AdS_{5}$
context, this leads to the construction of "heterotic Galileons". However,
realistic vacua of heterotic $M$-theory are necessarily $N=1$ supersymmetric in
four dimensions. Hence, we proceed to supersymmetrize the three-brane
worldvolume action, first in flat superspace and then extend the results to
$N=1$ supergravity. Such a worldvolume action may lead to interesting
cosmology, such as "bouncing" universe models, by allowing for the violation of
the Null Energy Condition (NEC).Comment: Version 3: Typos corrected, updated to be consistent with journal
version. 39 pages, 4 figure | $N=1$ Supergravitational Heterotic Galileons | $n=1$ supergravitational heterotic galileons | heterotic manifold mathbf orbifold planes observable precisely supersymmetric handed chiral supermultiplets. orbifold constitutes hidden observable suppressed ignored paper. fifth brane solitons render anomaly appear. heterotic brane cosmological scenarios realistic physics. worldvolume branes unknown. treating solitons branes worldvolume lagrangian heterotic action. analogy heterotic galileons realistic vacua heterotic necessarily supersymmetric dimensions. proceed supersymmetrize brane worldvolume superspace extend supergravity. worldvolume cosmology bouncing universe allowing violation .comment typos corrected updated version. pages | non_dup | [] |
154257986 | 10.1007/JHEP11(2017)027 | The charmless three-body decays $B^0_{(s)} \to K_s^0 h^+ h^{\prime-}$ (where $h^{(\prime)} = \pi, K$) are analysed using a sample of $pp$ collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 3 fb$^{−1}$. The branching fractions are measured relative to that of the $B^0 \to K_S^0\pi^+\pi^-$ decay, and are determined to be:\ud
$\frac{\mathcal{B}(B^0 \to K_S^0K^{\pm}\pi^{\mp})}{\mathcal{B}(B^0 \to K_S^0K^+\pi^-)} = 0.123 \pm 0.009(stat) \pm 0.015(syst)$,\ud
$\frac{\mathcal{B}(B^0 \to K_S^0K^+K^-)}{\mathcal{B}(B^0 \to K_S^0\pi^+\pi^-)} = 0.549 \pm 0.018(stat) \pm 0.033(syst)$,\ud
$\frac{\mathcal{B}(B_S^0 \to K_S^0\pi^+\pi^-)}{\mathcal{B}(B^0 \to K_S^0\pi^+\pi^-)} = 0.191 \pm 0.027(stat) \pm 0.031(syst) \pm 0.011(f_s/f_d)$,\ud
$\frac{\mathcal{B}(B_S^0 \to K_S^0K^{\pm}\pi^{\mp})}{\mathcal{B}(B^0 \to K_S^0\pi^+\pi^-)} = 1.70 \pm 0.07(stat) \pm 0.11(syst) \pm 0.10(f_s/f_d)$,\ud
$\frac{\mathcal{B}(B_S^0 \to K_S^0K^+K^-)}{\mathcal{B}(B^0 \to K_S^0\pi^+\pi^-)} \in [0.008−0.051]$ at 90% confidence level,\ud
where $f_s/f_d$ represents the ratio of hadronisation fractions of the $B_s^0$ and $B^0$ mesons | Updated branching fraction measurements of $B^0_{(s)} \to K_s^0 h^+ h^{\prime-}$ decays | updated branching fraction measurements of $b^0_{(s)} \to k_s^0 h^+ h^{\prime-}$ decays | charmless decays prime prime analysed collision lhcb luminosity branching fractions frac mathcal mathcal stat syst frac mathcal mathcal stat syst frac mathcal mathcal stat syst frac mathcal mathcal stat syst frac mathcal mathcal confidence hadronisation fractions mesons | non_dup | [] |
93944908 | 10.1007/JHEP11(2017)028 | We study the effect of vortices on the tunneling decay of a symmetry-breaking
false vacuum in three spacetime dimensions with gravity. The scenario
considered is one in which the initial state, rather than being the homogeneous
false vacuum, contains false vortices. The question addressed is whether, and,
if so, under which circumstances, the presence of vortices has a significant
catalyzing effect on vacuum decay. After studying the existence and properties
of vortices, we study their decay rate through quantum tunneling using a
variety of techniques. In particular, for so-called thin-wall vortices we
devise a one-parameter family of configurations allowing a quantum-mechanical
calculation of tunneling. Also for thin-wall vortices, we employ the Israel
junction conditions between the interior and exterior spacetimes. Matching
these two spacetimes reveals a decay channel which results in an unstable,
expanding vortex. We find that the tunneling exponent for vortices, which is
the dominant factor in the decay rate, is half that for Coleman-de Luccia
bubbles. This implies that vortices are short-lived, making them cosmologically
significant even for low vortex densities. In the limit of the vanishing
gravitational constant we smoothly recover our earlier results for the decay of
the false vortex in a model without gravity.Comment: 27 pages, 8 figures, Typos correcte | Tunneling decay of false vortices with gravitation | tunneling decay of false vortices with gravitation | vortices tunneling breaking false spacetime gravity. homogeneous false false vortices. addressed circumstances vortices catalyzing decay. studying vortices tunneling techniques. vortices devise configurations allowing tunneling. vortices employ israel junction interior exterior spacetimes. matching spacetimes reveals unstable expanding vortex. tunneling exponent vortices coleman luccia bubbles. vortices lived cosmologically vortex densities. vanishing gravitational smoothly recover false vortex pages typos correcte | non_dup | [] |
84327243 | 10.1007/JHEP11(2017)031 | According to common lore, Equations of State of field theories with gravity
duals tend to be soft, with speeds of sound either below or around the
conformal value of $v_s=1/\sqrt{3}$. This has important consequences in
particular for the physics of compact stars, where the detection of two solar
mass neutron stars has been shown to require very stiff equations of state. In
this paper, we show that no speed limit exists for holographic models at finite
density, explicitly constructing examples where the speed of sound becomes
arbitrarily close to that of light. This opens up the possibility of building
hybrid stars that contain quark matter obeying a holographic equation of state
in their cores.Comment: 22 pages+appendices, 12 figure | Stiff phases in strongly coupled gauge theories with holographic duals | stiff phases in strongly coupled gauge theories with holographic duals | lore duals tend speeds sound conformal sqrt consequences neutron stiff state. holographic explicitly constructing sound arbitrarily light. opens hybrid obeying holographic pages appendices | non_dup | [] |
93958782 | 10.1007/JHEP11(2017)032 | We apply the average null energy condition to obtain upper bounds on the
three-point function coefficients of stress tensors and a scalar operator,
$\langle TT {\cal O } \rangle,$ in general CFTs. We also constrain the
gravitational anomaly of $U(1)$ currents in four-dimensional CFTs, which are
encoded in three-point functions of the form $\langle TT J \rangle$. In
theories with a large $N$ AdS dual we translate these bounds into constraints
on the coefficient of a higher derivative bulk term of the form $\int
\phi\hspace{.5mm} W^2 $. We speculate that these bounds also apply in
de-Sitter. In this case our results constrain inflationary observables, such as
the amplitude for chiral gravity waves that originate from higher derivative
terms in the Lagrangian of the form $\phi \hspace{.5mm}W W^*$.Comment: 46 pages, 3 figure | Bounds on OPE Coefficients from Interference Effects in the Conformal
Collider | bounds on ope coefficients from interference effects in the conformal collider | bounds tensors langle rangle cfts. constrain gravitational anomaly currents cfts encoded langle rangle translate bounds hspace speculate bounds sitter. constrain inflationary observables chiral originate lagrangian hspace .comment pages | non_dup | [] |
93942486 | 10.1007/JHEP11(2017)033 | We present a general class of operators resembling compact tetraquarks which
have a range of colour-flavour-spin structures, transform irreducibly under the
symmetries of the lattice and respect other relevant symmetries. These
constructions are demonstrated in lattice QCD calculations with light quarks
corresponding to $m_\pi =$ 391 MeV. Using the distillation framework,
correlation functions involving large bases of meson-meson and tetraquark
operators are computed in the isospin-1 hidden-charm and doubly-charmed
sectors, and finite-volume spectra are extracted with the variational method.
We find the spectra are insensitive to the addition of tetraquark operators to
the bases of meson-meson operators. For the first time, through using diverse
bases of meson-meson operators, the multiple energy levels associated with
meson-meson levels which would be degenerate in the non-interacting limit are
extracted reliably. The number of energy levels in each spectrum is found to be
equal to the number of expected non-interacting meson-meson levels in the
energy region considered and the majority of energies lie close to the
non-interacting levels. Therefore, there is no strong indication for any bound
state or narrow resonance in the channels we study.Comment: 31 pages, 9 figures, minor changes to reflect published versio | Tetraquark operators in lattice QCD and exotic flavour states in the
charm sector | tetraquark operators in lattice qcd and exotic flavour states in the charm sector | resembling tetraquarks colour flavour transform irreducibly symmetries symmetries. constructions quarks mev. distillation involving bases meson meson tetraquark isospin hidden charm doubly charmed sectors variational method. insensitive tetraquark bases meson meson operators. diverse bases meson meson meson meson degenerate interacting reliably. interacting meson meson majority interacting levels. indication narrow pages minor reflect versio | non_dup | [] |
83844020 | 10.1007/JHEP11(2017)034 | Instanton partition functions of $\mathcal{N}=1$ 5d Super Yang-Mills reduced
on $S^1$ can be engineered in type IIB string theory from the $(p,q)$-branes
web diagram. To this diagram is superimposed a web of representations of the
Ding-Iohara-Miki (DIM) algebra that acts on the partition function. In this
correspondence, each segment is associated to a representation, and the
(topological string) vertex is identified with the intertwiner operator
constructed by Awata, Feigin and Shiraishi. We define a new intertwiner acting
on the representation spaces of levels $(1,n)\otimes(0,m)\to(1,n+m)$, thereby
generalizing to higher rank $m$ the original construction. It allows us to use
a folded version of the usual $(p,q)$-web diagram, bringing great
simplifications to actual computations. As a result, the characterization of
Gaiotto states and vertical intertwiners, previously obtained by some of the
authors, is uplifted to operator relations acting in the Fock space of
horizontal representations. We further develop a method to build qq-characters
of linear quivers based on the horizontal action of DIM elements. While
fundamental qq-characters can be built using the coproduct, higher ones require
the introduction of a (quantum) Weyl reflection acting on tensor products of
DIM generators.Comment: 42 page | (p,q)-webs of DIM representations, 5d N=1 instanton partition functions
and qq-characters | (p,q)-webs of dim representations, 5d n=1 instanton partition functions and qq-characters | instanton partition mathcal super mills engineered branes diagram. superimposed representations ding iohara miki acts partition function. correspondence segment topological intertwiner awata feigin shiraishi. intertwiner acting otimes thereby generalizing construction. folded usual bringing great simplifications computations. gaiotto intertwiners uplifted acting fock representations. build characters quivers elements. characters built coproduct weyl reflection acting | non_dup | [] |
86422134 | 10.1007/JHEP11(2017)035 | Given an $\mathcal{N}=2$ superconformal field theory, we reconsider the Schur
index $\mathcal{I}_L(q)$ in the presence of a half line defect $L$. Recently
Cordova-Gaiotto-Shao found that $\mathcal{I}_L(q)$ admits an expansion in terms
of characters of the chiral algebra $\mathcal{A}$ introduced by Beem et al.,
with simple coefficients $v_{L,\beta}(q)$. We report a puzzling new feature of
this expansion: the $q \to 1$ limit of the coefficients $v_{L_,\beta}(q)$ is
linearly related to the vacuum expectation values $\langle L \rangle$ in
$U(1)_r$-invariant vacua of the theory compactified on $S^1$. This relation can
be expressed algebraically as a commutative diagram involving three algebras:
the algebra generated by line defects, the algebra of functions on
$U(1)_r$-invariant vacua, and a Verlinde-like algebra associated to
$\mathcal{A}$. Our evidence is experimental, by direct computation in the
Argyres-Douglas theories of type $(A_1,A_2)$, $(A_1,A_4)$, $(A_1, A_6)$, $(A_1,
D_3)$ and $(A_1, D_5)$. In the latter two theories, which have flavor
symmetries, the Verlinde-like algebra which appears is a new deformation of
algebras previously considered.Comment: 64 pages, 21 figures. v2 published version, references update | Line defect Schur indices, Verlinde algebras and $U(1)_r$ fixed points | line defect schur indices, verlinde algebras and $u(1)_r$ fixed points | mathcal superconformal reconsider schur mathcal defect cordova gaiotto shao mathcal admits characters chiral mathcal beem beta puzzling beta linearly expectation langle rangle vacua compactified algebraically commutative involving algebras defects vacua verlinde mathcal argyres douglas flavor symmetries verlinde deformation algebras pages figures. update | non_dup | [] |
93942149 | 10.1007/JHEP11(2017)036 | We describe a novel technique that renders theories of $N$ axions tractable,
and more generally can be used to efficiently analyze a large class of periodic
potentials of arbitrary dimension. Such potentials are complex energy
landscapes with a number of local minima that scales as $\sqrt{N!}$, and so for
large $N$ appear to be analytically and numerically intractable. Our method is
based on uncovering a set of approximate symmetries that exist in addition to
the $N$ periods. These approximate symmetries, which are exponentially close to
exact, allow us to locate the minima very efficiently and accurately and to
analyze other characteristics of the potential. We apply our framework to
evaluate the diameters of flat regions suitable for slow-roll inflation, which
unifies, corrects and extends several forms of "axion alignment" previously
observed in the literature. We find that in a broad class of random theories,
the potential is smooth over diameters enhanced by $N^{3/2}$ compared to the
typical scale of the potential. A Mathematica implementation of our framework
is available online.Comment: 68 pages, 17 figure | Systematics of Aligned Axions | systematics of aligned axions | renders axions tractable efficiently analyze potentials dimension. potentials landscapes minima sqrt analytically numerically intractable. uncovering approximate symmetries periods. approximate symmetries exponentially locate minima efficiently accurately analyze potential. diameters slow roll inflation unifies corrects extends axion alignment literature. broad diameters potential. mathematica pages | non_dup | [] |
83837418 | 10.1007/JHEP11(2017)039 | Recent years have seen a surprising connection between the physics of
scattering amplitudes and a class of mathematical objects--the positive
Grassmannian, positive loop Grassmannians, tree and loop Amplituhedra--which
have been loosely referred to as "positive geometries". The connection between
the geometry and physics is provided by a unique differential form canonically
determined by the property of having logarithmic singularities (only) on all
the boundaries of the space, with residues on each boundary given by the
canonical form on that boundary. In this paper we initiate an exploration of
"positive geometries" and "canonical forms" as objects of study in their own
right in a more general mathematical setting. We give a precise definition of
positive geometries and canonical forms, introduce general methods for finding
forms for more complicated positive geometries from simpler ones, and present
numerous examples of positive geometries in projective spaces, Grassmannians,
and toric, cluster and flag varieties. We also illustrate a number of
strategies for computing canonical forms which yield interesting
representations for the forms associated with wide classes of positive
geometries, ranging from the simplest Amplituhedra to new expressions for the
volume of arbitrary convex polytopes.Comment: 123 pages, 12 figures, v2: fixed a reference and some minor typo | Positive Geometries and Canonical Forms | positive geometries and canonical forms | surprising connection amplitudes mathematical grassmannian grassmannians amplituhedra loosely referred geometries connection canonically logarithmic singularities boundaries canonical boundary. initiate exploration geometries canonical mathematical setting. precise geometries canonical complicated geometries simpler numerous geometries projective grassmannians toric flag varieties. illustrate canonical representations geometries ranging simplest amplituhedra expressions convex pages minor typo | non_dup | [] |
86414685 | 10.1007/JHEP11(2017)040 | We propose an effective conformal field theory (CFT) description of steady
state incompressible fluid turbulence at the inertial range of scales in any
number of spatial dimensions. We derive a KPZ-type equation for the anomalous
scaling of the longitudinal velocity structure functions and relate the
intermittency parameter to the boundary Euler (A-type) conformal anomaly
coefficient. The proposed theory consists of a mean field CFT that exhibits
Kolmogorov linear scaling (K41 theory) coupled to a dilaton. The dilaton is a
Nambu-Goldstone gapless mode that arises from a spontaneous breaking due to the
energy flux of the separate scale and time symmetries of the inviscid
Navier-Stokes equations to a K41 scaling with a dynamical exponent
$z=\frac{2}{3}$. The dilaton acts as a random measure that dresses the K41
theory and introduces intermittency. We discuss the two, three and large number
of space dimensions cases and how entanglement entropy can be used to
characterize the intermittency strength.Comment: 27 pages, revtex; added discussions, added formulas, added referenc | Spontaneous Symmetry Breaking, Conformal Anomaly and Incompressible
Fluid Turbulence | spontaneous symmetry breaking, conformal anomaly and incompressible fluid turbulence | propose conformal steady incompressible turbulence inertial dimensions. derive anomalous longitudinal relate intermittency euler conformal anomaly coefficient. exhibits kolmogorov dilaton. dilaton nambu goldstone gapless arises spontaneous breaking symmetries inviscid navier stokes exponent frac dilaton acts dresses introduces intermittency. entanglement characterize intermittency pages revtex discussions formulas referenc | non_dup | [] |
86414011 | 10.1007/JHEP11(2017)041 | We consider 5d $\mathcal{N}=1$ $Sp(1)$ gauge theory based on a brane
configuration with an O5-plane. At the UV fixed point, the theory with no
matter enjoys enhanced global symmetry $SU(2)$ or $U(1)$ depending on the
discrete theta angle $\theta=0, \pi$ (mod $2\pi$). A naive brane configuration
with an O5-plane, however, does not distinguish two different theories, as it
describes the weak coupling region. We devise a technique for computing 5d
Seiberg-Witten curve of the two theories from the brane web with an O5-plane.
Their Seiberg-Witten curves show that their M5 configurations under the
presence of OM5-planes are different. The decompactification limit of each
Seiberg-Witten curve also shows distinct phase structures in their Coulomb
branch leading to significantly different $(p,q)$ 5-brane configurations with
an O5-plane in the strong coupling region.Comment: v1: 45 pages, 36 figures, v2: published version, v3: a typo correcte | Discrete theta angle from an O5-plane | discrete theta angle from an o5-plane | mathcal brane plane. enjoys theta theta naive brane distinguish describes region. devise seiberg witten brane plane. seiberg witten configurations planes different. decompactification seiberg witten coulomb branch brane configurations pages typo correcte | non_dup | [] |
83862206 | 10.1007/JHEP11(2017)042 | We study the possibilities and the implications of a spontaneous breakdown of
charge in the MSSM and in the $Z_3$-symmetric NMSSM. The breakdown is triggered
by the charged states of the Higgs doublets acquiring vacuum expectation
values. In the MSSM, it is known that the presence of a charge conserving
minimum for the tree-level Higgs potential precludes a deeper (global)
charge-breaking minimum. We find that the inclusion of radiative correction to
the potential does not alter the situation while a deeper charge-conserving
minimum could arise, albeit with no major practical consequences. In the NMSSM
scenario, a charge-breaking global minimum, with or without an accompanying
charge-conserving deeper minimum, could appear even with the tree-level Higgs
potential thanks to the presence of a charge-neutral scalar state which
transforms as a singlet under the Standard Model gauge group. Use of the NMSSM
Higgs potential that includes both quantum and thermal corrections and the
requirement of a viable (stable or long-lived) vacuum that breaks the
electroweak symmetry, along with its compatibility with the latest Higgs data,
lead to nontrivial constraints on the NMSSM parameter space.Comment: 27 pages, 8 figures, 1 table; matches with published versio | Spontaneous breakdown of charge in the MSSM and in the NMSSM:
Possibilities and Implications | spontaneous breakdown of charge in the mssm and in the nmssm: possibilities and implications | possibilities spontaneous breakdown mssm nmssm. breakdown triggered doublets acquiring expectation values. mssm conserving precludes deeper breaking minimum. inclusion radiative alter deeper conserving arise albeit practical consequences. nmssm breaking accompanying conserving deeper thanks neutral transforms singlet group. nmssm requirement viable lived breaks electroweak compatibility latest nontrivial nmssm pages matches versio | non_dup | [] |
84333048 | 10.1007/JHEP11(2017)043 | The requirement for an ultraviolet completable theory to be well-behaved upon
compactification has been suggested as a guiding principle for distinguishing
the landscape from the swampland. Motivated by the weak gravity conjecture and
the multiple point principle, we investigate the vacuum structure of the
standard model compactified on $S^1$ and $T^2$. The measured value of the Higgs
mass implies, in addition to the electroweak vacuum, the existence of a new
vacuum where the Higgs field value is around the Planck scale. We explore two-
and three-dimensional critical points of the moduli potential arising from
compactifications of the electroweak vacuum as well as this high scale vacuum,
in the presence of Majorana/Dirac neutrinos and/or axions. We point out
potential sources of instability for these lower dimensional critical points in
the standard model landscape. We also point out that a high scale $AdS_4$
vacuum of the Standard Model, if exists, would be at odd with the conjecture
that all non-supersymmetric $AdS$ vacua are unstable. We argue that, if we
require a degeneracy between three- and four-dimensional vacua as suggested by
the multiple point principle, the neutrinos are predicted to be Dirac, with the
mass of the lightest neutrino O(1-10) meV, which may be tested by future CMB,
large scale structure and $21$cm line observations.Comment: 56 pages, 22 figures, published versio | Weak Gravity Conjecture, Multiple Point Principle and the Standard Model
Landscape | weak gravity conjecture, multiple point principle and the standard model landscape | requirement ultraviolet completable behaved compactification guiding distinguishing landscape swampland. motivated conjecture compactified electroweak planck scale. explore moduli arising compactifications electroweak majorana dirac neutrinos axions. instability landscape. conjecture supersymmetric vacua unstable. argue degeneracy vacua neutrinos dirac lightest pages versio | non_dup | [] |
78509662 | 10.1007/JHEP11(2017)046 | The Nambu-Goldstone (NG) bosons of the SYK model are described by a coset
space Diff/$\mathbb{SL}(2,\mathbb{R})$, where Diff, or Virasoro group, is the
group of diffeomorphisms of the time coordinate valued on the real line or a
circle. It is known that the coadjoint orbit action of Diff naturally turns out
to be the two-dimensional quantum gravity action of Polyakov without
cosmological constant, in a certain gauge, in an asymptotically flat spacetime.
Motivated by this observation, we explore Polyakov action with cosmological
constant and boundary terms, and study the possibility of such a
two-dimensional quantum gravity model being the AdS dual to the low energy (NG)
sector of the SYK model. We find strong evidences for this duality: (a) the
bulk action admits an exact family of asymptotically AdS$_2$ spacetimes,
parameterized by Diff/$\mathbb{SL}(2,\mathbb{R})$, in addition to a fixed
conformal factor of a simple functional form; (b) the bulk path integral
reduces to a path integral over Diff/$\mathbb{SL}(2,\mathbb{R})$ with a
Schwarzian action; (c) the low temperature free energy qualitatively agrees
with that of the SYK model. We show, up to quadratic order, how to couple an
infinite series of bulk scalars to the Polyakov model and show that it
reproduces the coupling of the higher modes of the SYK model with the NG
bosons.Comment: 2+33 pages (including Appendices), 3 figures; v2 has revised
discussion of orbits in Section 2, typos corrected; v3 has a new appendix
analysing the off-shell equations of motion; v4 is published version with
some more typos corrected; v5 corrects some typesetting error | Coadjoint orbit action of Virasoro group and two-dimensional quantum
gravity dual to SYK/tensor models | coadjoint orbit action of virasoro group and two-dimensional quantum gravity dual to syk/tensor models | nambu goldstone bosons coset diff mathbb mathbb diff virasoro diffeomorphisms coordinate valued circle. coadjoint orbit diff naturally turns polyakov cosmological asymptotically spacetime. motivated explore polyakov cosmological model. evidences duality admits asymptotically spacetimes parameterized diff mathbb mathbb conformal reduces diff mathbb mathbb schwarzian qualitatively agrees model. quadratic couple infinite scalars polyakov reproduces pages appendices revised orbits typos corrected analysing typos corrected corrects typesetting | non_dup | [] |
84090798 | 10.1007/JHEP11(2017)048 | Chaos and complexity entail an entropic and computational obstruction to
describing a system, and thus are intrinsically difficult to characterize. In
this paper, we consider time evolution by Gaussian Unitary Ensemble (GUE)
Hamiltonians and analytically compute out-of-time-ordered correlation functions
(OTOCs) and frame potentials to quantify scrambling, Haar-randomness, and
circuit complexity. While our random matrix analysis gives a qualitatively
correct prediction of the late-time behavior of chaotic systems, we find
unphysical behavior at early times including an $\mathcal{O}(1)$ scrambling
time and the apparent breakdown of spatial and temporal locality. The salient
feature of GUE Hamiltonians which gives us computational traction is the
Haar-invariance of the ensemble, meaning that the ensemble-averaged dynamics
look the same in any basis. Motivated by this property of the GUE, we introduce
$k$-invariance as a precise definition of what it means for the dynamics of a
quantum system to be described by random matrix theory. We envision that the
dynamical onset of approximate $k$-invariance will be a useful tool for
capturing the transition from early-time chaos, as seen by OTOCs, to late-time
chaos, as seen by random matrix theory.Comment: 61 pages, 14 figures; v2: references added, typos fixe | Chaos, Complexity, and Random Matrices | chaos, complexity, and random matrices | chaos entail entropic obstruction describing intrinsically characterize. unitary ensemble hamiltonians analytically ordered otocs potentials quantify scrambling haar randomness circuit complexity. qualitatively chaotic unphysical mathcal scrambling apparent breakdown locality. salient hamiltonians traction haar invariance ensemble meaning ensemble averaged look basis. motivated invariance precise theory. envision onset approximate invariance capturing chaos otocs chaos pages typos fixe | non_dup | [] |
93940707 | 10.1007/JHEP11(2017)049 | We demonstrate that a holographic model of the Einstein-Podolsky-Rosen pair
exhibits fast scrambling. Strongly entangled quark and antiquark in
$\mathcal{N}=4$ super Yang-Mills theory are considered. Their gravity dual is a
fundamental string whose endpoints are uniformly accelerated in opposite
direction. We slightly increase the acceleration of the endpoint and show that
it quickly destroys the correlation between the quark and antiquark. The proper
time scale of the destruction is $\tau_\ast\sim \beta \ln S$ where $\beta$ is
the inverse Unruh temperature and $S$ is the entropy of the accelerating quark.
We also evaluate the Lyapunov exponent from correlation function as
$\lambda_L=2\pi/\beta$, which saturates the Lyapunov bound. Our results suggest
that the fast scrambling or saturation of the Lyapunov bound do not directly
imply the existence of an Einstein dual. When we slightly decrease the
acceleration, the quark and antiquark are causally connected and an "one-way
traversable wormhole" is created on the worldsheet. It causes the divergence of
the correlation function between the quark and antiquark.Comment: 18 pages, 6 figure | Fast scrambling in holographic Einstein-Podolsky-Rosen pair | fast scrambling in holographic einstein-podolsky-rosen pair | holographic einstein podolsky rosen exhibits scrambling. entangled antiquark mathcal super mills considered. endpoints uniformly accelerated opposite direction. acceleration endpoint quickly destroys antiquark. proper destruction beta beta unruh accelerating quark. lyapunov exponent lambda beta saturates lyapunov bound. scrambling saturation lyapunov imply einstein dual. acceleration antiquark causally traversable wormhole created worldsheet. divergence pages | non_dup | [] |
83852358 | 10.1007/JHEP11(2017)050 | We find AdS5 solutions holographically dual to compactifications of
six-dimensional N=(1,0) supersymmetric field theories on Riemann surfaces with
punctures. We simplify a previous analysis of supersymmetric AdS5 IIA
solutions, and with a suitable Ansatz we find explicit solutions organized in
three classes, where an O8--D8 stack, D6- and D4-branes are simultaneously
present, localized and partially localized. The D4-branes are smeared over the
Riemann surface and this is interpreted as the presence of a uniform
distribution of punctures. For the first class we identify the corresponding
six-dimensional theory as an E-string theory coupled to a quiver gauge theory.
The second class of solutions lacks D6-branes and its central charge scales as
$n^{5/2}$, suggesting a five-dimensional origin for the dual field theory. The
last class has elements of the previous two.Comment: 45 pages, 6 figure | AdS5 compactifications with punctures in massive IIA supergravity | ads5 compactifications with punctures in massive iia supergravity | holographically compactifications supersymmetric riemann punctures. simplify supersymmetric ansatz organized stack branes simultaneously localized partially localized. branes smeared riemann interpreted punctures. quiver theory. lacks branes theory. pages | non_dup | [] |
84326323 | 10.1007/JHEP11(2017)051 | We calculate the baryon asymmetry of the Universe in the Z3-invariant
Next-to-Minimal Supersymmetric Standard Model where the interactions of the
singlino provide the necessary source of charge and parity violation. Using the
closed time path formalism, we derive and solve transport equations for the
cases where the singlet acquires a vacuum expectation value (VEV) before and
during the electroweak phase transition. We perform a detailed scan to show how
the baryon asymmetry varies throughout the relevant parameter space. Our
results show that the case where the singlet acquires a VEV during the
electroweak phase transition typically generates a larger baryon asymmetry,
although we expect that the case where the singlet acquires a VEV first is far
more common for any model in which parameters unify at a high scale. Finally,
we examine the dependence of the baryon asymmetry on the three-body
interactions involving gauge singlets.Comment: 24 pages, version submitted to the journa | Electroweak baryogenesis in the Z3-invariant NMSSM | electroweak baryogenesis in the z3-invariant nmssm | baryon asymmetry universe supersymmetric singlino parity violation. formalism derive solve singlet acquires expectation electroweak transition. scan baryon asymmetry varies space. singlet acquires electroweak generates baryon asymmetry singlet acquires unify scale. examine baryon asymmetry involving pages submitted journa | non_dup | [] |
84328914 | 10.1007/JHEP11(2017)052 | We consider $D$-dimensional amplitudes in $R^2$ gravities (conformal gravity
in $D=4$) and in the recently introduced $(DF)^2$ gauge theory, from the
perspective of the CHY formulae and ambitwistor string theory. These theories
are related through the BCJ double-copy construction, and the $(DF)^2$ gauge
theory obeys color-kinematics duality. We work out the worldsheet details of
these theories and show that they admit a formulation as integrals on the
support of the scattering equations, or alternatively, as ambitwistor string
theories. For gravity, this generalizes the work done by Berkovits and Witten
on conformal gravity to $D$ dimensions. The ambitwistor is also interpreted as
a $D$-dimensional generalization of Witten's twistor string (SYM + conformal
supergravity). As part of our ambitwistor investigation, we discover another
$(DF)^2$ gauge theory containing a photon that couples to Einstein gravity.
This theory can provide an alternative KLT description of Einstein gravity
compared to the usual Yang-Mills squared.Comment: 35 pages; v2: references added/updated, revised versio | Ambitwistor formulations of $R^2$ gravity and $(DF)^2$ gauge theories | ambitwistor formulations of $r^2$ gravity and $(df)^2$ gauge theories | amplitudes gravities conformal perspective formulae ambitwistor theory. copy obeys kinematics duality. worldsheet admit formulation integrals alternatively ambitwistor theories. generalizes berkovits witten conformal dimensions. ambitwistor interpreted generalization witten twistor conformal supergravity ambitwistor discover couples einstein gravity. einstein usual mills pages updated revised versio | non_dup | [] |
83854627 | 10.1007/JHEP11(2017)053 | Recursion relations for the sphere $4$-point and torus $1$-point ${\cal W}_3$
conformal blocks, generalizing Alexei Zamolodchikov's famous relation for the
Virasoro conformal blocks are proposed. One of these relations is valid for any
4-point conformal block with two arbitrary and two special primaries with
charge parameters proportional to the highest weight of the fundamental irrep
of $SU(3)$. The other relation is designed for the torus conformal block with a
special (in above mentioned sense) primary field insertion. AGT relation maps
the sphere conformal block and the torus block to the instanton partition
functions of the ${\cal N}=2$ $SU(3)$ SYM theory with 6 fundamental or an
adjoint hypermultiplets respectively. AGT duality played a central role in
establishing these recurrence relations, whose gauge theory counterparts are
novel relations for the $SU(3)$ partition functions with $N_f=6$ fundamental or
an adjoint hypermultiplets. By decoupling some (or all) hypermultiplets,
recurrence relations for the asymptotically free theories with $0\le N_f<6$ are
found.Comment: 17 pages, 2 figures; minor corrections, published versio | Recurrence relations for the ${\cal W}_3$ conformal blocks and ${\cal
N}=2$ SYM partition functions | recurrence relations for the ${\cal w}_3$ conformal blocks and ${\cal n}=2$ sym partition functions | recursion sphere torus conformal blocks generalizing alexei zamolodchikov famous virasoro conformal blocks proposed. valid conformal primaries irrep torus conformal insertion. sphere conformal torus instanton partition adjoint hypermultiplets respectively. duality played establishing recurrence counterparts partition adjoint hypermultiplets. decoupling hypermultiplets recurrence asymptotically pages minor versio | non_dup | [] |
93956157 | 10.1007/JHEP11(2017)054 | We study the change in the resurgent asymptotic properties of a trans-series
in two parameters, a coupling $g^2$ and a gauge index $N$, as a system passes
through a large $N$ phase transition, using the universal example of the
Gross-Witten-Wadia third-order phase transition in the unitary matrix model.
This transition is well-studied in the immediate vicinity of the transition
point, where it is characterized by a double-scaling limit Painlev\'e II
equation, and also away from the transition point using the pre-string
difference equation. Here we present a complementary analysis of the transition
at all coupling and all finite N, in terms of a differential equation, using
the explicit Tracy-Widom mapping of the Gross-Witten-Wadia partition function
to a solution of a Painlev\'e III equation. This mapping provides a simple
method to generate trans-series expansions in all parameter regimes, and to
study their transmutation as the parameters are varied. For example, at any
finite N the weak coupling expansion is divergent, with a non-perturbative
trans-series completion; on the other hand, the strong coupling expansion is
convergent, and yet there is still a non-perturbative trans-series completion.
We show how the different instanton terms `condense' at the transition point to
match with the double-scaling limit trans-series. We also define a uniform
large N strong-coupling expansion (a non-linear analogue of uniform WKB), which
is much more precise than the conventional large N expansion through the
transition region, and apply it to the evaluation of Wilson loops.Comment: 46 pages; 20 figure | Transmutation of a Trans-series: The Gross-Witten-Wadia Phase Transition | transmutation of a trans-series: the gross-witten-wadia phase transition | resurgent asymptotic passes universal gross witten wadia unitary model. immediate vicinity painlev away equation. complementary tracy widom gross witten wadia partition painlev equation. expansions regimes transmutation varied. divergent perturbative completion convergent perturbative completion. instanton condense match series. analogue precise wilson pages | non_dup | [] |
83846179 | 10.1007/JHEP11(2017)056 | We compute the off-shell 1-loop tadpole amplitude in heterotic string field
theory. With a special choice of cubic vertex, we show that this amplitude can
be computed exactly. We obtain explicit and elementary expressions for the
Feynman graph decomposition of the moduli space, the local coordinate map at
the puncture as a function of the modulus, and the $b$-ghost insertions needed
for the integration measure. Recently developed homotopy algebra methods
provide a consistent configuration of picture changing operators. We discuss
the consequences of spurious poles for the choice of picture changing
operators.Comment: v3: 36 pages, 8 figures. Figure 8 correcte | One Loop Tadpole in Heterotic String Field Theory | one loop tadpole in heterotic string field theory | tadpole heterotic theory. cubic exactly. elementary expressions feynman decomposition moduli coordinate puncture modulus ghost insertions measure. homotopy picture changing operators. consequences spurious poles picture changing pages figures. correcte | non_dup | [] |
83869315 | 10.1007/JHEP11(2017)057 | We consider the production of an arbitrary number of colour-singlet particles
near partonic threshold, and show that next-to-leading order cross sections for
this class of processes have a simple universal form at next-to-leading power
(NLP) in the energy of the emitted gluon radiation. Our analysis relies on a
recently derived factorisation formula for NLP threshold effects at amplitude
level, and therefore applies both if the leading-order process is tree-level
and if it is loop-induced. It holds for differential distributions as well. The
results can furthermore be seen as applications of recently derived
next-to-soft theorems for gauge theory amplitudes. We use our universal
expression to re-derive known results for the production of up to three Higgs
bosons at NLO in the large top mass limit, and for the hadro-production of a
pair of electroweak gauge bosons. Finally, we present new analytic results for
Higgs boson pair production at NLO and NLP, with exact top-mass dependence.Comment: 27 pages, 6 figure | Universality of next-to-leading power threshold effects for colourless
final states in hadronic collisions | universality of next-to-leading power threshold effects for colourless final states in hadronic collisions | colour singlet partonic universal emitted gluon radiation. relies factorisation applies induced. well. theorems amplitudes. universal derive bosons hadro electroweak bosons. analytic boson pages | non_dup | [] |
86413828 | 10.1007/JHEP11(2017)059 | We provide expressions for the nonperturbative matching of the effective
field theory describing dark matter interactions with quarks and gluons to the
effective theory of nonrelativistic dark matter interacting with
nonrelativistic nucleons. We give the leading and subleading order expressions
in chiral counting. In general, a single partonic operator already matches onto
several nonrelativistic operators at leading order in chiral counting. Thus,
keeping only one operator at the time in the nonrelativistic effective theory
does not properly describe the scattering in direct detection. Moreover, the
matching of the axial--axial partonic level operator, as well as the matching
of the operators coupling DM to the QCD anomaly term, naively include momentum
suppressed terms. However, these are still of leading chiral order due to pion
poles and can be numerically important. We illustrate the impact of these
effects with several examples.Comment: 47 pages, 8 figures. Improved discussion, corrected typographical
errors, updated reference | From quarks to nucleons in dark matter direct detection | from quarks to nucleons in dark matter direct detection | expressions nonperturbative matching describing quarks gluons nonrelativistic interacting nonrelativistic nucleons. subleading expressions chiral counting. partonic matches nonrelativistic chiral counting. keeping nonrelativistic properly detection. matching axial axial partonic matching anomaly naively suppressed terms. chiral pion poles numerically important. illustrate pages figures. corrected typographical updated | non_dup | [] |
78511535 | 10.1007/JHEP11(2017)060 | We present an expression for the four-point conformal blocks of symmetric
traceless operators of arbitrary spin as an integral over a pair of geodesics
in Anti-de Sitter space, generalizing the geodesic Witten diagram formalism of
Hijano et al [arXiv:1508.00501] to arbitrary spin. As an intermediate step in
the derivation, we identify a convenient basis of bulk three-point interaction
vertices which give rise to all possible boundary three point structures. We
highlight a direct connection between the representation of the conformal block
as a geodesic Witten diagram and the shadow operator formalism.Comment: 28+6 pages, 8 figure | Spinning Geodesic Witten Diagrams | spinning geodesic witten diagrams | conformal blocks traceless geodesics sitter generalizing geodesic witten formalism hijano spin. derivation convenient structures. highlight connection conformal geodesic witten shadow pages | non_dup | [] |
86416339 | 10.1007/JHEP11(2017)061 | Stringent relations between the $B^{(*)} \to D^{(*)} $ form factors exist in
the heavy quark limit and the leading symmetry breaking corrections are known.
We reconsider their uncertainty and role in the analysis of recent Belle data
for $B\to D^{(*)}\ell\nu$ with model-independent parametrizations and in the
related prediction of $R(D^{(*)})$. We find $|V_{cb}|=41.5(1.3) \ 10^{-3}$ and
$|V_{cb}|=40.6(^{+1.2}_{-1.3}) \ 10^{-3}$ using input from Light Cone Sum
Rules, and $R(D^{*})=0.260(8)$.Comment: 13 pages. Improved discussion of R(D*), P_tau prediction and various
explanations adde | $R(D^*)$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between
form factors | $r(d^*)$, $|v_{cb}|$, and the heavy quark symmetry relations between form factors | stringent breaking known. reconsider belle parametrizations cone .comment pages. explanations adde | non_dup | [] |
84326916 | 10.1007/JHEP11(2017)063 | We present a new method of deriving the off-shell spectrum of supergravity
and massless $4D,~\mathcal{N}=1$ higher spin multiplets without the need of an
action and based on a set of natural requirements: (a.) existence of an
underlying superspace description, (b.) an economical description of free,
massless, higher spins and (c.) equal numbers of bosonic and fermionic degrees
of freedom. We prove that for any theory that respects the above, the fermionic
auxiliary components come in pairs and are gauge invariant and there are two
types of bosonic auxiliary components. Type (1) are pairs of a $(2,0)$-tensor
with real or imaginary $(1,1)$-tensor with non-trivial gauge transformations.
Type (2) are singlets and gauge invariant. The outcome is a set of Diophantine
equations, the solutions of which determine the off-shell spectrum of
supergravity and massless higher spin multiplets. This approach provides (i) a
classification of the irreducible, supersymmetric, representations of arbitrary
spin and (ii) a very clean and intuitive explanation to why some of these
theories have more than one formulations (e.g. the supergravity multiplet) and
others do not | From Diophantus to Supergravity and massless higher spin multiplets | from diophantus to supergravity and massless higher spin multiplets | deriving supergravity massless mathcal multiplets superspace economical massless spins bosonic fermionic freedom. respects fermionic auxiliary come bosonic auxiliary components. imaginary trivial transformations. singlets invariant. diophantine supergravity massless multiplets. irreducible supersymmetric representations clean intuitive explanation formulations e.g. supergravity multiplet | non_dup | [] |
93936492 | 10.1007/JHEP11(2017)064 | We study a class of 6d $\mathcal{N}=(1,0)$ non-geometric vacua of the
$\text{Spin}(32)/\mathbb Z_2$ heterotic string which can be understood as
fibrations of genus-two curves over a complex one-dimensional base. The 6d
$\mathcal{N}=(1,0)$ theories living on the defects that arise when the
genus-two fiber degenerates at a point of the base are analyzed by dualizing to
F-theory on elliptic K3-fibered non-compact Calabi-Yau threefolds. We consider
all possible degenerations of genus-two curves and systematically attempt to
resolve the singularities of the dual threefolds. As in the analogous
non-geometric vacua of the $E_8\times E_8$ heterotic string, we find that many
of the resulting dual threefolds contain singularities which do not admit a
crepant resolution. When the singularities can be resolved crepantly, we
determine the emerging effective theories which turn out to be little string
theories at a generic point on their tensor branch. We also observe a form of
duality in which theories living on distinct defects are the same.Comment: 39 pages, 3 figures, and 6 table | Non-Geometric Vacua of the $\mathbf{\text{Spin}(32)/\mathbb Z_2}$
Heterotic String and Little String Theories | non-geometric vacua of the $\mathbf{\text{spin}(32)/\mathbb z_2}$ heterotic string and little string theories | mathcal geometric vacua mathbb heterotic understood fibrations genus base. mathcal living defects arise genus fiber degenerates dualizing elliptic fibered calabi threefolds. degenerations genus systematically attempt resolve singularities threefolds. analogous geometric vacua heterotic threefolds singularities admit crepant resolution. singularities resolved crepantly emerging generic branch. duality living defects pages | non_dup | [] |
84093218 | 10.1007/JHEP11(2017)065 | We derive the stochastic description of a massless, interacting scalar field
in de Sitter space directly from the quantum theory. This is done by showing
that the density matrix for the effective theory of the long wavelength
fluctuations of the field obeys a quantum version of the Fokker-Planck
equation. This equation has a simple connection with the standard Fokker-Planck
equation of the classical stochastic theory, which can be generalised to any
order in perturbation theory. We illustrate this formalism in detail for the
theory of a massless scalar field with a quartic interaction.Comment: 25 pages, no figure | The quantum Fokker-Planck equation of stochastic inflation | the quantum fokker-planck equation of stochastic inflation | derive stochastic massless interacting sitter theory. obeys fokker planck equation. connection fokker planck stochastic generalised perturbation theory. illustrate formalism massless quartic pages | non_dup | [] |
84090790 | 10.1007/JHEP11(2017)066 | It is known that there are AdS vacua obtained from compactifying the SM to 2
or 3 dimensions. The existence of such vacua depends on the value of neutrino
masses through the Casimir effect. Using the Weak Gravity Conjecture, it has
been recently argued by Ooguri and Vafa that such vacua are incompatible with
the SM embedding into a consistent theory of quantum gravity. We study the
limits obtained for both the cosmological constant $\Lambda_4$ and neutrino
masses from the absence of such dangerous 3D and 2D SM AdS vacua. One
interesting implication is that $\Lambda_4$ is bounded to be larger than a
scale of order $m_\nu^4$, as observed experimentally. Interestingly, this is
the first argument implying a non-vanishing $\Lambda_4$ only on the basis of
particle physics, with no cosmological input. Conversely, the observed
$\Lambda_4$ implies strong constraints on neutrino masses in the SM and also
for some BSM extensions including extra Weyl or Dirac spinors, gravitinos and
axions. The upper bounds obtained for neutrino masses imply (for fixed neutrino
Yukawa and $\Lambda_4$) the existence of upper bounds on the EW scale. In the
case of massive Majorana neutrinos with a see-saw mechanism associated to a
large scale $M\simeq 10^{10-14}$ GeV and $Y_{\nu_1}\simeq 10^{-3}$, one obtains
that the EW scale cannot exceed $M_{EW}\lesssim 10^2-10^4$ GeV. From this point
of view, the delicate fine-tuning required to get a small EW scale would be a
mirage, since parameters yielding higher EW scales would be in the swampland
and would not count as possible consistent theories. This would bring a new
perspective into the issue of the EW hierarchy.Comment: 41 pages, 21 figures, 5 tables. v2: Added section 6 + fig.12 +
references; typos correcte | Constraining Neutrino Masses, the Cosmological Constant and BSM Physics
from the Weak Gravity Conjecture | constraining neutrino masses, the cosmological constant and bsm physics from the weak gravity conjecture | vacua compactifying dimensions. vacua casimir effect. conjecture argued ooguri vafa vacua incompatible embedding gravity. cosmological lambda dangerous vacua. implication lambda experimentally. interestingly argument implying vanishing lambda cosmological input. conversely lambda extensions extra weyl dirac spinors gravitinos axions. bounds imply yukawa lambda bounds scale. massive majorana neutrinos simeq simeq obtains exceed lesssim gev. delicate fine tuning mirage yielding swampland count theories. bring perspective pages tables. fig. typos correcte | non_dup | [] |
83862441 | 10.1007/JHEP11(2017)068 | We study the transverse momentum distribution of hadrons within jets, where
the transverse momentum is defined with respect to the standard jet axis. We
consider the case where the jet substructure measurement is performed for an
inclusive jet sample $pp\to\text{jet}+X$. We demonstrate that this observable
provides new opportunities to study transverse momentum dependent fragmentation
functions (TMDFFs) which are currently poorly constrained from data, especially
for gluons. The factorization of the cross section is obtained within Soft
Collinear Effective Theory (SCET), and we show that the relevant TMDFFs are the
same as for the more traditional processes semi-inclusive deep inelastic
scattering (SIDIS) and electron-positron annihilation. Different than in SIDIS,
the observable for the in-jet fragmentation does not depend on TMD parton
distribution functions which allows for a cleaner and more direct probe of
TMDFFs. We present numerical results and compare to available data from the
LHC.Comment: 28 pages, 3 figures, published versio | The transverse momentum distribution of hadrons within jets | the transverse momentum distribution of hadrons within jets | hadrons jets axis. substructure inclusive observable opportunities fragmentation tmdffs poorly constrained gluons. factorization collinear scet tmdffs traditional inclusive inelastic sidis positron annihilation. sidis observable fragmentation parton cleaner tmdffs. pages versio | non_dup | [] |
93951812 | 10.1007/JHEP11(2017)069 | The one-loop correction to heavy quark pair back-to-back production in
unpolarized semi-inclusive deep inelastic scattering is given in this work in
the framework of transverse momentum dependent(TMD) factorization. Both
unpolarized and linearly polarized TMD gluon distribution functions are taken
into account. A subtraction method based on diagram expansion is used to get
finite hard coefficients. It is found the soft and collinear divergences of
one-loop amplitude is proportional to tree level ones and can be expressed
through several basic scalar triangle and bubble integrals. The subtraction of
these divergences is spin independent. Beyond tree level an additional soft
factor related to final heavy quark pair must be added into the factorization
formula. This soft factor affects the azimuthal angle distribution of virtual
photon in a nonperturbative way. Integrating over virtual photon azimuthal
angle we construct three weighted cross sections, which depend on only three
additional integrated soft factors. These weighted cross sections can be used
to extract linearly polarized gluon distribution function. In addition, lepton
azimuthal angle is unintegrated in this work, which provides more observables.
All hard coefficients relevant to lepton and virtual photon azimuthal angle
distributions are given at one-loop level.Comment: 23 pages, 10 figure | Back-to-back heavy quark pair production in Semi-inclusive DIS | back-to-back heavy quark pair production in semi-inclusive dis | unpolarized inclusive inelastic factorization. unpolarized linearly polarized gluon account. subtraction coefficients. collinear divergences triangle bubble integrals. subtraction divergences independent. factorization formula. affects azimuthal virtual nonperturbative way. integrating virtual azimuthal weighted factors. weighted extract linearly polarized gluon function. lepton azimuthal unintegrated observables. lepton virtual azimuthal pages | non_dup | [] |
86416831 | 10.1007/JHEP11(2017)070 | We revisit the flavor-changing processes involving an axion-like particle
(ALP) in the context of generic ALP effective lagrangian with a discussion of
possible UV completions providing the origin of the relevant bare ALP
couplings. We focus on the minimal scenario that ALP has flavor-conserving
couplings at tree level, and the leading flavor-changing couplings arise from
the loops involving the Yukawa couplings of the Standard Model fermions. We
note that such radiatively generated flavor-changing ALP couplings can be
easily suppressed in field theoretic ALP models with sensible UV completion. We
discuss also the implication of our result for string theoretic ALP originating
from higher-dimensional $p$-form gauge fields, for instance for ALP in large
volume string compactification scenario.Comment: 41 pages, 3 figures; v3: a discussion on general extended Higgs
sector added in sec. 2, version published in JHE | Minimal Flavor Violation with Axion-like Particles | minimal flavor violation with axion-like particles | revisit flavor changing involving axion generic lagrangian completions bare couplings. flavor conserving couplings flavor changing couplings arise loops involving yukawa couplings fermions. radiatively flavor changing couplings suppressed theoretic sensible completion. implication theoretic originating compactification pages sec. | non_dup | [] |
73953934 | 10.1007/JHEP11(2017)071 | We describe the defect operator interpretation of the supersymmetric Renyi
entropies of superconformal field theories in three, four and five dimensions.
The operators involved are supersymmetric codimension-two defects in an
auxiliary Z_n gauge theory coupled to n copies of the SCFT. We compute the
exact expectation values of such operators using localization, and compare the
results to the supersymmetric Renyi entropy. The agreement between the two
implies a relationship between the partition function on a squashed sphere and
the one on a round sphere in the presence of defects.Comment: 45 pages, 1 figur | Supersymmetric R\'enyi Entropy and Defect Operators | supersymmetric r\'enyi entropy and defect operators | defect supersymmetric renyi entropies superconformal dimensions. supersymmetric codimension defects auxiliary copies scft. expectation localization supersymmetric renyi entropy. partition squashed sphere round sphere pages figur | non_dup | [] |
86418007 | 10.1007/JHEP11(2017)072 | We study reheating in $\alpha$-attractor models of inflation in which the
inflaton couples to other scalars or fermions. We show that the parameter space
contains viable regions in which the inflaton couplings to radiation can be
determined from the properties of CMB temperature fluctuations, in particular
the spectral index. This may be the only way to measure these fundamental
microphysical parameters, which shaped the universe by setting the initial
temperature of the hot big bang and contain important information about the
embedding of a given model of inflation into a more fundamental theory of
physics. The method can be applied to other models of single field inflation.Comment: 39 pages, 14 figures. Identical to the version that is to appear in
JHE | CMB constraints on the inflaton couplings and reheating temperature in
$\alpha$-attractor inflation | cmb constraints on the inflaton couplings and reheating temperature in $\alpha$-attractor inflation | reheating alpha attractor inflation inflaton couples scalars fermions. viable inflaton couplings index. microphysical shaped universe bang embedding inflation physics. pages figures. | non_dup | [] |
83854807 | 10.1007/JHEP11(2017)073 | It is one of the major issues to realize a vacuum which breaks supersymmetry
(SUSY) and R-symmetry, in a supersymmetric model. We study the model, where the
same sector breaks the gauge symmetry and SUSY. In general, the SUSY breaking
model without gauge symmetry has a flat direction at the minimum of F-term
scalar potential. When we introduce U(1) gauge symmetry to such a SUSY breaking
model, there can appear a runaway direction. Such a runway direction can be
lifted by loop effects, and the gauge symmetry breaking and SUSY breaking are
realized. The R-symmetry, that is assigned to break SUSY, is also spontaneously
broken at the vacuum. This scenario can be extended to non-Abelian gauge
theories. We also discuss application to the Pati-Salam model and the SU(5)
grand unified theory. We see that non-vanishing gaugino masses are radiatively
generated by the R-symmetry breaking and the gauge messenger contribution.Comment: 23 pages, version accepted in JHE | Realization of a spontaneous gauge and supersymmetry breaking vacuum | realization of a spontaneous gauge and supersymmetry breaking vacuum | realize breaks supersymmetry susy supersymmetric model. breaks susy. susy breaking potential. susy breaking runaway direction. runway lifted breaking susy breaking realized. assigned break susy spontaneously broken vacuum. abelian theories. pati salam grand unified theory. vanishing gaugino radiatively breaking messenger pages | non_dup | [] |
83848461 | 10.1007/JHEP11(2017)074 | The decay rate of a false vacuum is studied in gauge theory, paying
particular attention to its gauge invariance. Although the decay rate should
not depend on the gauge parameter $\xi$ according to the Nielsen identity, the
gauge invariance of the result of a perturbative calculation has not been
clearly shown. We give a prescription to perform a one-loop calculation of the
decay rate, with which a manifestly gauge-invariant expression of the decay
rate is obtained. We also discuss the renormalization necessary to make the
result finite, and show that the decay rate is independent of the gauge
parameter even after the renormalization.Comment: 39 pages, 1 figure, typos corrected, reference adde | False Vacuum Decay in Gauge Theory | false vacuum decay in gauge theory | false paying invariance. nielsen invariance perturbative shown. prescription manifestly obtained. renormalization pages typos corrected adde | non_dup | [] |
78510898 | 10.1007/JHEP11(2017)075 | It has been shown that AdS/CFT calculations can reproduce certain exclusive
2->2 cross sections in QCD at high energy, both for near-forward and for
fixed-angle scattering. In this paper, we extend prior treatments by using
AdS/CFT to calculate the inclusive single-particle production cross section in
QCD at high center-of-mass energy. We find that conformal invariance in the UV
restricts the cross section to have a characteristic power-law falloff in the
transverse momentum of the produced particle, with the exponent given by twice
the conformal dimension of the produced particle, independent of incoming
particle types. We conclude by comparing our findings to recent LHC
experimental data from ATLAS and ALICE, and find good agreement.Comment: JHEP version. Discussion, appendix, figures, and tables added.
Conclusions and key results unchange | Inclusive Production Through AdS/CFT | inclusive production through ads/cft | reproduce exclusive scattering. extend treatments inclusive energy. conformal invariance restricts falloff exponent twice conformal incoming types. atlas alice jhep version. tables added. unchange | non_dup | [] |
86421890 | 10.1007/JHEP11(2017)076 | We study the holographic entanglement entropy of spatial regions with corners
in the AdS4/BCFT3 correspondence by considering three dimensional boundary
conformal field theories whose boundary is a timelike plane. We compute
analytically the corner function corresponding to an infinite wedge having one
edge on the boundary. A relation between this corner function and the
holographic one point function of the stress tensor is observed. An analytic
expression for the corner function of an infinite wedge having only its tip on
the boundary is also provided. This formula requires to find the global minimum
among two extrema of the area functional. The corresponding critical
configurations of corners are studied. The results have been checked against a
numerical analysis performed by computing the area of the minimal surfaces
anchored to some finite domains containing corners.Comment: 83 pages, 29 figures. v2: published versio | Corner contributions to holographic entanglement entropy in AdS4/BCFT3 | corner contributions to holographic entanglement entropy in ads4/bcft3 | holographic entanglement corners bcft correspondence conformal timelike plane. analytically corner infinite wedge boundary. corner holographic observed. analytic corner infinite wedge provided. extrema functional. configurations corners studied. checked anchored pages figures. versio | non_dup | [] |
42743092 | 10.1007/JHEP11(2017)077 | We review the systematics of Mandelstam cut contributions to planar
scattering amplitudes in the multi-Regge limit. Isolating the relevant cut
terms, we explain how the BFKL expansion can be used to construct the
perturbative n-point multi-Regge limit amplitude in certain kinematic regions
from a finite number of basic building blocks. At three loops and at leading
logarithmic order, two building blocks are required. Their symbols are
extracted from the known three-loop six-point and seven-point symbols for
general kinematics. The new seven-point building block is constructed in terms
of single-valued multiple polylogarithms to the extent it can be determined
using the symbol as well as further symmetry and consistency constraints.
Beyond the leading logarithmic order, the subleading and sub-subleading terms
require two and one further building block, respectively. The latter could
either be reconstructed from further perturbative data, or from BFKL integrals
involving yet-unknown corrections to the central emission block.Comment: 34 pages, 88 diagrams; v2: added references, fixed typos, minor
revision; v3: significant extension, new section on construction of the
function g3, new appendix on four-loop decomposition, published versio | Systematics of the Multi-Regge Three-Loop Symbol | systematics of the multi-regge three-loop symbol | systematics mandelstam planar amplitudes regge limit. isolating bfkl perturbative regge kinematic blocks. loops logarithmic blocks required. symbols seven symbols kinematics. seven valued polylogarithms symbol consistency constraints. logarithmic subleading subleading respectively. reconstructed perturbative bfkl integrals involving unknown pages diagrams typos minor revision decomposition versio | non_dup | [] |
84331871 | 10.1007/JHEP11(2017)078 | We explicitly construct families of integrable $\sigma$-model actions
smoothly interpolating between exact CFTs. In the ultraviolet the theory is the
direct product of two current algebras at levels $k_1$ and $k_2$. In the
infrared and for the case of two deformation matrices the CFT involves a coset
CFT, whereas for a single matrix deformation it is given by the ultraviolet
direct product theories but at levels $k_1$ and $k_2-k_1$. For isotropic
deformations we demonstrate integrability. In this case we also compute the
exact beta-function for the deformation parameters using gravitational methods.
This is shown to coincide with previous results obtained using perturbation
theory and non-perturbative symmetries.Comment: 1+27 pages, text improvements, version published in JHE | Integrable flows between exact CFTs | integrable flows between exact cfts | explicitly families integrable sigma smoothly interpolating cfts. ultraviolet algebras infrared deformation involves coset deformation ultraviolet isotropic deformations integrability. beta deformation gravitational methods. coincide perturbation perturbative pages improvements | non_dup | [] |
86413771 | 10.1007/JHEP11(2017)079 | Coulomb branches of a set of $3d\ \mathcal{N}=4$ supersymmetric gauge
theories are closures of nilpotent orbits of the algebra $\mathfrak{so}(n)$.
From the point of view of string theory, these quantum field theories can be
understood as effective gauge theories describing the low energy dynamics of a
brane configuration with the presence of orientifold planes. The presence of
the orientifold planes raises the question to whether the orthogonal factors of
a the gauge group are indeed orthogonal $O(N)$ or special orthogonal $SO(N)$.
In order to investigate this problem, we compute the Hilbert series for the
Coulomb branch of $T^\sigma(SO(n)^\vee)$ theories, utilizing the monopole
formula. The results for all nilpotent orbits from $\mathfrak {so} (3)$ to
$\mathfrak{so}(10)$ which are special and normal are presented. A new
relationship between the choice of $SO/O(N)$ factors in the gauge group and the
Lusztig's Canonical Quotient of the corresponding nilpotent orbit is observed.
We also provide a new way of projecting several magnetic lattices of different
$SO(N)$ gauge group factors by the simultaneous action of a $\mathbb Z_2$
group.Comment: 33 pages, 3 figures, 28 table | Nilpotent orbits and the Coulomb branch of $T^\sigma (G)$ theories:
special orthogonal vs orthogonal gauge group factors | nilpotent orbits and the coulomb branch of $t^\sigma (g)$ theories: special orthogonal vs orthogonal gauge group factors | coulomb branches mathcal supersymmetric closures nilpotent orbits mathfrak understood describing brane orientifold planes. orientifold planes raises orthogonal orthogonal orthogonal hilbert coulomb branch sigma utilizing monopole formula. nilpotent orbits mathfrak mathfrak presented. lusztig canonical quotient nilpotent orbit observed. projecting lattices simultaneous mathbb pages | non_dup | [] |
84333309 | 10.1007/JHEP11(2017)080 | We discuss inflation and dark matter in the inert doublet model coupled
non-minimally to gravity where the inert doublet is the inflaton and the
neutral scalar part of the doublet is the dark matter candidate. We calculate
the various inflationary parameters like $n_s$, $r$ and $P_s$ and then proceed
to the reheating phase where the inflaton decays into the Higgs and other gauge
bosons which are non-relativistic owing to high effective masses. These bosons
further decay or annihilate to give relativistic fermions which are finally
responsible for reheating the universe. At the end of the reheating phase, the
inert doublet which was the inflaton enters into thermal equilibrium with the
rest of the plasma and its neutral component later freezes out as cold dark
matter with a mass of about 2 TeV.Comment: 21 pages, 7 figures, 1 table; some explanations added; references
added; version published in JHE | Inflation and Dark Matter in the Inert Doublet Model | inflation and dark matter in the inert doublet model | inflation inert doublet minimally inert doublet inflaton neutral doublet candidate. inflationary proceed reheating inflaton decays bosons relativistic owing masses. bosons annihilate relativistic fermions reheating universe. reheating inert doublet inflaton enters neutral freezes cold pages explanations | non_dup | [] |
83870520 | 10.1007/JHEP11(2017)081 | Computing the exact spectrum of charged massless matter is a crucial step
towards understanding the effective field theory describing F-theory vacua in
four dimensions. In this work we further develop a coherent framework to
determine the charged massless matter in F-theory compactified on elliptic
fourfolds, and demonstrate its application in a concrete example. The gauge
background is represented, via duality with M-theory, by algebraic cycles
modulo rational equivalence. Intersection theory within the Chow ring allows us
to extract coherent sheaves on the base of the elliptic fibration whose
cohomology groups encode the charged zero-mode spectrum. The dimensions of
these cohomology groups are computed with the help of modern techniques from
algebraic geometry, which we implement in the software gap. We exemplify this
approach in models with an Abelian and non-Abelian gauge group and observe
jumps in the exact massless spectrum as the complex structure moduli are
varied. An extended mathematical appendix gives a self-contained introduction
to the algebro-geometric concepts underlying our framework.Comment: 41 pages + extended appendice | Gauge Backgrounds and Zero-Mode Counting in F-Theory | gauge backgrounds and zero-mode counting in f-theory | massless crucial describing vacua dimensions. coherent massless compactified elliptic fourfolds concrete example. duality algebraic cycles modulo rational equivalence. intersection chow extract coherent sheaves elliptic fibration cohomology encode spectrum. cohomology modern algebraic implement gap. exemplify abelian abelian jumps massless moduli varied. mathematical algebro geometric concepts pages appendice | non_dup | [] |
84332957 | 10.1007/JHEP11(2017)083 | We consider partition functions with insertions of surface operators of
topologically twisted N=2, SU(2) supersymmetric Yang-Mills theory, or
Donaldson-Witten theory for short, on a four-manifold. If the metric of the
compact four-manifold has positive scalar curvature, Moore and Witten have
shown that the partition function is completely determined by the integral over
the Coulomb branch parameter $a$, while more generally the Coulomb branch
integral captures the wall-crossing behavior of both Donaldson polynomials and
Seiberg-Witten invariants. We show that after addition of a Q-exact surface
operator to the Moore-Witten integrand, the integrand can be written as a total
derivative to the anti-holomorphic coordinate $\bar a$ using Zwegers'
indefinite theta functions. In this way, we reproduce G\"ottsche's expressions
for Donaldson invariants of rational surfaces in terms of indefinite theta
functions for any choice of metric.Comment: 23 pages + appendices, comments welcome. v2: published versio | Donaldson-Witten theory and indefinite theta functions | donaldson-witten theory and indefinite theta functions | partition insertions topologically twisted supersymmetric mills donaldson witten manifold. manifold curvature moore witten partition coulomb branch coulomb branch captures crossing donaldson polynomials seiberg witten invariants. moore witten integrand integrand holomorphic coordinate zwegers indefinite theta functions. reproduce ottsche expressions donaldson invariants rational indefinite theta pages appendices comments welcome. versio | non_dup | [] |
93954598 | 10.1007/JHEP11(2017)084 | We consider compactifications of type IIA superstring theory on mirror-folds
obtained as K3 fibrations over two-tori with non-geometric monodromies
involving mirror symmetries. At special points in the moduli space these are
asymmetric Gepner models. The compactifications are constructed from
non-geometric automorphisms that arise from the diagonal action of an
automorphism of the K3 surface and of an automorphism of the mirror surface. We
identify the corresponding gaugings of N=4 supergravity in four dimensions, and
show that the minima of the potential describe the same four-dimensional
low-energy physics as the worldsheet formulation in terms of asymmetric Gepner
models. In this way, we obtain a class of Minkowski vacua of type II string
theory which preserve N=2 supersymmetry. The massless sector consists of N=2
supergravity coupled to 3 vector multiplets, giving the STU model. In some
cases there are additional massless hypermultiplets.Comment: 48 pages, no figures; v2: few typos corrected, one rephrased
statement in subsection 5. | Non-geometric Calabi-Yau Backgrounds and K3 automorphisms | non-geometric calabi-yau backgrounds and k3 automorphisms | compactifications superstring mirror folds fibrations tori geometric monodromies involving mirror symmetries. moduli asymmetric gepner models. compactifications geometric automorphisms arise diagonal automorphism automorphism mirror surface. gaugings supergravity minima worldsheet formulation asymmetric gepner models. minkowski vacua preserve supersymmetry. massless supergravity multiplets giving model. massless pages typos corrected rephrased statement subsection | non_dup | [] |
93951143 | 10.1007/JHEP11(2017)087 | Of all $B \to D \overline{D}$ decays, the $B^0 \to D^0 \overline{D^0}$ decay
has the smallest observed branching ratio as it takes place primarily via the
suppressed $W$-exchange diagram. The $CP$ asymmetry for this mode is yet to be
measured experimentally. By exploiting the relationship among the decay
amplitudes of $B \to D\overline{D}$ decays (using isospin and topological
amplitudes) we are able to relate the $CP$ asymmetries and branching ratios by
a simple expression. This enables us to predict the $CP$ asymmetry $C_{00}$ in
$B^0 \to D^0 \overline{D^0}$. While the predicted central values of $C_{00}$
are outside the physically allowed region, they are currently associated with
large uncertainties owing to the large errors in the measurements of the $B^0
\to D^0 \overline{D^0}$ branching ratio ($B_{00}$), the other $CP$ asymmetries
$C_{+-}$ (of $B^0 \to D^+ D^-$) and $A_{\text{CP}}$ (of $B^+ \to D^+
\overline{D^0}$). With a precise determination of $B_{00}$, $C_{+-}$ and
$A_{\text{CP}}$, one can use our analytical result to predict $C_{00}$ with a
reduced error and compare it with the experimental measurement when it becomes
available. The correlation between $B_{00}$ and $C_{00}$ is an interesting
aspect that can be probed in ongoing and future particle physics experiments
such as LHCb and Belle II.Comment: 21 pages, 6 figures, accepted for publication in JHE | Prediction of the $CP$ asymmetry $C_{00}$ in $B^0 \to D^0\overline{D^0}$
decay | prediction of the $cp$ asymmetry $c_{00}$ in $b^0 \to d^0\overline{d^0}$ decay | overline decays overline smallest branching primarily suppressed diagram. asymmetry experimentally. exploiting amplitudes overline decays isospin topological amplitudes relate asymmetries branching expression. enables predict asymmetry overline physically owing overline branching asymmetries overline precise predict available. aspect probed ongoing lhcb belle pages publication | non_dup | [] |
83837292 | 10.1007/JHEP11(2017)088 | We match the seesaw model for generating neutrino masses onto the Standard
Model Effective Field Theory (SMEFT). We perform this matching at tree level up
to dimension seven in the operator expansion. We explain how some of the
perturbations of the neutrino mass matrix due to operators of mass dimension
greater than five are tied to integrating out the heavy Majorana mass
eigenstates in sequence. We demonstrate that the low energy limit of seesaw
models are well described by the SMEFT, particularly when constructed using a
flavour space expansion. Flavour space expansions of seesaw models are of
interest as the coupling of the heavy states to the Standard Model, that are
integrated out to generate neutrino masses, are through flavour space vectors
$\in \mathbb{C}^3$. We point out that neutrino phenomenology can be
systematically developed as a perturbation around the unknown eigenvectors
diagonalizing the charged lepton mass matrix using the fact that these
eigenvectors also form a basis of $\mathbb{C}^3$. This point holds in seesaw
models and can also be applied to other models of neutrino mass generation to
develop systematic expansions. We develop the algebra for this flavour space
and discuss some phenomenology to illustrate this approach.Comment: 16 pages + appendix, 3 figures, one nice algebra, V3: minor
correction | On expansions in neutrino effective field theory | on expansions in neutrino effective field theory | match seesaw generating smeft matching seven expansion. perturbations tied integrating majorana eigenstates sequence. seesaw smeft flavour expansion. flavour expansions seesaw flavour mathbb phenomenology systematically perturbation unknown eigenvectors diagonalizing lepton eigenvectors mathbb seesaw expansions. flavour phenomenology illustrate pages nice minor | non_dup | [] |
84329142 | 10.1007/JHEP11(2017)089 | We present an explicit expression for the grand potential of the U(N)^3
superconformal Chern-Simons theory with the Chern-Simons levels being (k,0,-k).
From the viewpoint of the Newton polygon, it is expected that the grand
potential is given by the free energy of the topological string theory on the
local D_5 del Pezzo geometry, though the explicit identification was a puzzle
for years. We show how the expectation is realized explicitly. As a bonus, we
can also study the Z_2 orbifold of this theory and find the grand potential is
now given in terms of the local E_7 del Pezzo geometry.Comment: 47 pages; v3: typos corrected, published versio | Superconformal Chern-Simons Theories from del Pezzo Geometries | superconformal chern-simons theories from del pezzo geometries | grand superconformal chern simons chern simons viewpoint newton polygon grand topological pezzo puzzle years. expectation realized explicitly. bonus orbifold grand pezzo pages typos corrected versio | non_dup | [] |
93954676 | 10.1007/JHEP11(2017)090 | In this paper we discuss $3d$ ${\cal N}=2$ supersymmetric gauge theories and
their IR dualities when they are compactified on a circle of radius $r$, and
when we take the $2d$ limit in which $r\to 0$. The $2d$ limit depends on how
the mass parameters are scaled as $r\to 0$, and often vacua become infinitely
distant in the $2d$ limit, leading to a direct sum of different $2d$ theories.
For generic mass parameters, when we take the same limit on both sides of a
duality, we obtain $2d$ dualities (between gauge theories and/or
Landau-Ginzburg theories) that pass all the usual tests. However, when there
are non-compact branches the discussion is subtle because the metric on the
moduli space, which is not controlled by supersymmetry, plays an important role
in the low-energy dynamics after compactification. Generally speaking, for IR
dualities of gauge theories, we conjecture that dualities involving non-compact
Higgs branches survive. On the other hand when there is a non-compact Coulomb
branch on at least one side of the duality, the duality fails already when the
$3d$ theories are compactified on a circle. Using the valid reductions we
reproduce many known $2d$ IR dualities, giving further evidence for their
validity, and we also find new $2d$ dualities | From 3d duality to 2d duality | from 3d duality to 2d duality | supersymmetric dualities compactified circle scaled vacua infinitely distant theories. generic sides duality dualities landau ginzburg pass usual tests. branches subtle moduli supersymmetry plays compactification. speaking dualities conjecture dualities involving branches survive. coulomb branch duality duality fails compactified circle. valid reductions reproduce dualities giving validity dualities | non_dup | [] |
86419054 | 10.1007/JHEP11(2017)091 | We examine the large $N$ 1/4-BPS spectrum of the symmetric orbifold CFT
Sym$^N(M)$ deformed to the supergravity point in moduli space for $M= K3$ and
$T^4$. We consider refinement under both left- and right-moving $SU(2)_R$
symmetries of the superconformal algebra, and decompose the spectrum into
characters of the algebra. We find that at large $N$ the character
decomposition satisfies an unusual property, in which the degeneracy only
depends on a certain linear combination of left- and right-moving quantum
numbers, suggesting deeper symmetry structure. Furthermore, we consider the
action of discrete symmetry groups on these degeneracies, where certain
subgroups of the Conway group are known to play a role. We also comment on the
potential for larger discrete symmetry groups to appear in the large $N$ limit.Comment: 27 pages + appendices; v2: minor change | Symmetries of the refined D1/D5 BPS spectrum | symmetries of the refined d1/d5 bps spectrum | examine orbifold deformed supergravity moduli refinement moving symmetries superconformal decompose characters algebra. character decomposition satisfies unusual degeneracy moving deeper structure. degeneracies subgroups conway role. comment pages appendices minor | non_dup | [] |
73406888 | 10.1007/JHEP11(2017)093 | We derive the electroweak (EW) collinear splitting functions for the Standard
Model, including the massive fermions, gauge bosons and the Higgs boson. We
first present the splitting functions in the limit of unbroken SU(2)xU(1) and
discuss their general features in the collinear and soft-collinear regimes. We
then systematically incorporate EW symmetry breaking (EWSB), which leads to the
emergence of additional "ultra-collinear" splitting phenomena and naive
violations of the Goldstone-boson Equivalence Theorem. We suggest a
particularly convenient choice of non-covariant gauge (dubbed "Goldstone
Equivalence Gauge") that disentangles the effects of Goldstone bosons and gauge
fields in the presence of EWSB, and allows trivial book-keeping of leading
power corrections in the VEV. We implement a comprehensive, practical EW
showering scheme based on these splitting functions using a Sudakov evolution
formalism. Novel features in the implementation include a complete accounting
of ultra-collinear effects, matching between shower and decay, kinematic
back-reaction corrections in multi-stage showers, and mixed-state evolution of
neutral bosons (gamma/Z/h) using density-matrices. We employ the EW showering
formalism to study a number of important physical processes at O(1-10 TeV)
energies. They include (a) electroweak partons in the initial state as the
basis for vector-boson-fusion; (b) the emergence of "weak jets" such as those
initiated by transverse gauge bosons, with individual splitting probabilities
as large as O(30%); (c) EW showers initiated by top quarks, including Higgs
bosons in the final state; (d) the occurrence of O(1) interference effects
within EW showers involving the neutral bosons; and (e) EW corrections to new
physics processes, as illustrated by production of a heavy vector boson (W')
and the subsequent showering of its decay products.Comment: 67 pages, 12 figures; v2, published in JHEP, some expanded
discussions and other minor revision | Electroweak Splitting Functions and High Energy Showering | electroweak splitting functions and high energy showering | derive electroweak collinear splitting massive fermions bosons boson. splitting unbroken collinear collinear regimes. systematically incorporate breaking ewsb emergence ultra collinear splitting phenomena naive violations goldstone boson equivalence theorem. convenient covariant dubbed goldstone equivalence disentangles goldstone bosons ewsb trivial book keeping vev. implement comprehensive practical showering splitting sudakov formalism. accounting ultra collinear matching shower kinematic showers neutral bosons gamma matrices. employ showering formalism energies. electroweak partons boson fusion emergence jets initiated bosons splitting probabilities showers initiated quarks bosons occurrence interference showers involving neutral bosons illustrated boson showering pages jhep expanded discussions minor revision | non_dup | [] |
86414515 | 10.1007/JHEP11(2017)094 | We consider a composite model where both the Higgs and a complex scalar
$\chi$, which is the dark matter (DM) candidate, arise as light pseudo
Nambu-Goldstone bosons (pNGBs) from a strongly coupled sector with TeV scale
confinement. The global symmetry structure is $SO(7)/SO(6)$, and the DM is
charged under an exact $U(1)_{\rm DM} \subset SO(6)$ that ensures its
stability. Depending on whether the $\chi$ shift symmetry is respected or
broken by the coupling of the top quark to the strong sector, the DM can be
much lighter than the Higgs or have a weak-scale mass. Here we focus primarily
on the latter possibility. We introduce the lowest-lying composite resonances
and impose calculability of the scalar potential via generalized Weinberg sum
rules. Compared to previous analyses of pNGB DM, the computation of the relic
density is improved by fully accounting for the effects of the fermionic top
partners. This plays a crucial role in relaxing the tension with the current DM
direct detection constraints. The spectrum of resonances contains exotic top
partners charged under the $U(1)_{\rm DM}$, whose LHC phenomenology is
analyzed. We identify a region of parameters with $f = 1.4\; \mathrm{TeV}$ and
$200\;\mathrm{GeV} \lesssim m_\chi \lesssim 400\;\mathrm{GeV}$ that satisfies
all existing bounds. This DM candidate will be tested by XENON1T in the near
future.Comment: 36 pages + appendices and references, 10 figures. v2: minor
modifications, references added. Matches version published in JHE | Charged Composite Scalar Dark Matter | charged composite scalar dark matter | composite candidate arise pseudo nambu goldstone bosons pngbs confinement. ensures stability. respected broken lighter mass. primarily possibility. lying composite resonances impose calculability weinberg rules. pngb relic accounting fermionic partners. plays crucial relaxing tension constraints. resonances exotic partners phenomenology analyzed. mathrm mathrm lesssim lesssim mathrm satisfies bounds. candidate xenon pages appendices figures. minor modifications added. matches | non_dup | [] |
93940622 | 10.1007/JHEP11(2017)095 | If the scalar sector of the Standard Model is non-minimal, one might expect
multiple generations of the hypercharge-1/2 scalar doublet analogous to the
generational structure of the fermions. In this work, we examine the structure
of a Higgs sector consisting of N Higgs doublets (where N \geq 2). It is
particularly convenient to work in the so-called charged Higgs basis, in which
the neutral Higgs vacuum expectation value resides entirely in the first Higgs
doublet, and the charged components of remaining N-1 Higgs doublets are
mass-eigenstate fields.
We elucidate the interactions of the gauge bosons with the physical Higgs
scalars and the Goldstone bosons and show that they are determined by an Nx2N
matrix. This matrix depends on (N-1)(2N-1) real parameters that are associated
with the mixing of the neutral Higgs fields in the charged Higgs basis. Among
these parameters, N-1 are unphysical (and can be removed by rephasing the
physical charged Higgs fields), and the remaining 2(N-1)^2 parameters are
physical. We also demonstrate a particularly simple form for the cubic
interaction and some of the quartic interactions of the Goldstone bosons with
the physical Higgs scalars. These results are applied in the derivation of
Higgs coupling sum rules and tree-level unitarity bounds that restrict the size
of the quartic scalar couplings. In particular, new applications to three Higgs
doublet models with an order-4 CP symmetry and with a Z_3 symmetry,
respectively, are presented.Comment: 66 pages, 3 figures. v2: refs adde | Multi-Higgs doublet models: physical parametrization, sum rules and
unitarity bounds | multi-higgs doublet models: physical parametrization, sum rules and unitarity bounds | generations hypercharge doublet analogous generational fermions. examine consisting doublets convenient neutral expectation resides entirely doublet doublets eigenstate fields. elucidate bosons scalars goldstone bosons matrix. neutral basis. unphysical removed rephasing physical. cubic quartic goldstone bosons scalars. derivation unitarity bounds restrict quartic couplings. doublet pages figures. refs adde | non_dup | [] |
73954926 | 10.1007/JHEP11(2017)096 | We are interested in thermalization in the D1D5 CFT, since this process is
expected to be dual to black hole formation. We expect that the lowest order
process where thermalization occurs will be at second order in the perturbation
that moves us away from the orbifold point. The operator governing the
deformation off of the orbifold point consists of a twist operator combined
with a supercharge operator acting on this twist. In a previous paper we
computed the action of two twist operators on an arbitrary state of the CFT. In
the present work we compute the action of the supercharges on these twist
operators, thereby obtaining the full action of two deformation operators on an
arbitrary state of the CFT. We show that the full amplitude can be related to
the amplitude with just the twists through an action of the supercharge
operators on the initial and final states. The essential part of this
computation consists of moving the contours from the twist operators to the
initial and final states; to do this one must first map the amplitude to a
covering space where the twists are removed, and then map back to the original
space on which the CFT is defined.Comment: 48 pages, 2 figure | Full action of two deformation operators in the D1D5 CFT | full action of two deformation operators in the d1d5 cft | interested thermalization formation. thermalization perturbation moves away orbifold point. governing deformation orbifold twist supercharge acting twist. twist cft. supercharges twist thereby obtaining deformation cft. twists supercharge states. moving contours twist covering twists removed pages | non_dup | [] |
84092455 | 10.1007/JHEP11(2017)097 | We propose an optimization procedure for Euclidean path-integrals that
evaluate CFT wave functionals in arbitrary dimensions. The optimization is
performed by minimizing certain functional, which can be interpreted as a
measure of computational complexity, with respect to background metrics for the
path-integrals. In two dimensional CFTs, this functional is given by the
Liouville action. We also formulate the optimization for higher dimensional
CFTs and, in various examples, find that the optimized hyperbolic metrics
coincide with the time slices of expected gravity duals. Moreover, if we
optimize a reduced density matrix, the geometry becomes two copies of the
entanglement wedge and reproduces the holographic entanglement entropy. Our
approach resembles a continuous tensor network renormalization and provides a
concrete realization of the proposed interpretation of AdS/CFT as tensor
networks. The present paper is an extended version of our earlier report
arXiv:1703.00456 and includes many new results such as evaluations of
complexity functionals, energy stress tensor, higher dimensional extensions and
time evolutions of thermofield double states.Comment: 63 pages, 10 figure | Liouville Action as Path-Integral Complexity: From Continuous Tensor
Networks to AdS/CFT | liouville action as path-integral complexity: from continuous tensor networks to ads/cft | propose euclidean integrals functionals dimensions. minimizing interpreted metrics integrals. cfts liouville action. formulate cfts optimized hyperbolic metrics coincide slices duals. optimize copies entanglement wedge reproduces holographic entanglement entropy. resembles renormalization concrete realization networks. evaluations functionals extensions evolutions thermofield pages | non_dup | [] |
93945363 | 10.1007/JHEP11(2017)099 | The $\sim 3\sigma$ discrepancy between the predicted and observed reactor
anti-neutrino flux, known as the reactor anti-neutrino anomaly, continues to
intrigue. The recent discovery of an unexpected bump in the reactor
anti-neutrino spectrum, as well as indications that the flux deficit is
different for different fission isotopes seems to disfavour the explanation of
the anomaly in terms of sterile neutrino oscillations. We critically review
this conclusion in view of all available data on electron (anti)neutrino
disappearance. We find that the sterile neutrino hypothesis cannot be rejected
based on global data and is only mildly disfavored compared to an individual
rescaling of neutrino fluxes from different fission isotopes. The main reason
for this is the presence of spectral features in recent data from the NEOS and
DANSS experiments. If state-of-the-art predictions for reactor fluxes are taken
at face value, sterile neutrino oscillations allow a consistent description of
global data with a significance close to $3\sigma$ relative to the
no-oscillation case. Even if reactor fluxes and spectra are left free in the
fit, a $2\sigma$ hint in favour of sterile neutrinos remains, with allowed
parameter regions consistent with an explanation of the anomaly in terms of
oscillations.Comment: 25 pages, 5 figures. 1 page and table 4 added. Published in JHE | Sterile Neutrinos or Flux Uncertainties? - Status of the Reactor
Anti-Neutrino Anomaly | sterile neutrinos or flux uncertainties? - status of the reactor anti-neutrino anomaly | sigma discrepancy reactor reactor anomaly continues intrigue. discovery unexpected bump reactor indications deficit fission isotopes disfavour explanation anomaly sterile oscillations. critically disappearance. sterile rejected mildly disfavored rescaling fluxes fission isotopes. neos danss experiments. reactor fluxes sterile oscillations sigma oscillation case. reactor fluxes sigma hint favour sterile neutrinos explanation anomaly pages figures. added. | non_dup | [] |
84093941 | 10.1007/JHEP11(2017)100 | We introduce a set of identities in the cohomology ring of elliptic
fibrations which are equivalent to the cancellation of gauge and mixed
gauge-gravitational anomalies in F-theory compactifications to four and six
dimensions. The identities consist in (co)homological relations between complex
codimension-two cycles. The same set of relations, once evaluated on elliptic
Calabi-Yau three-folds and four-folds, is shown to universally govern the
structure of anomalies and their Green-Schwarz cancellation in six- and
four-dimensional F-theory vacua, respectively. We furthermore conjecture that
these relations hold not only within the cohomology ring, but even at the level
of the Chow ring, i.e. as relations among codimension-two cycles modulo
rational equivalence. We verify this conjecture in non-trivial examples with
Abelian and non-Abelian gauge groups factors. Apart from governing the
structure of local anomalies, the identities in the Chow ring relate different
types of gauge backgrounds on elliptically fibred Calabi-Yau four-folds.Comment: 45 page | Algebraic Cycles and Local Anomalies in F-Theory | algebraic cycles and local anomalies in f-theory | identities cohomology elliptic fibrations cancellation gravitational anomalies compactifications dimensions. identities consist homological codimension cycles. elliptic calabi folds folds universally govern anomalies schwarz cancellation vacua respectively. conjecture hold cohomology chow i.e. codimension cycles modulo rational equivalence. verify conjecture trivial abelian abelian factors. apart governing anomalies identities chow relate backgrounds elliptically fibred calabi | non_dup | [] |
86418585 | 10.1007/JHEP11(2017)101 | Within a phenomenological holographic model in $(4+1)$-bulk dimensions,
defined by Einstein-gravity with a negative cosmological constant, coupled to a
Dirac-Born-Infeld and a Chern-Simons term, we explore the fate of BF-bound
violation for a probe scalar field and a fluctuation mode of the corresponding
geometry. We assume this simple model to capture the dynamics of a strongly
coupled SU$(N_c)$ gauge theory with $N_f$ fundamental matter, which in the
limit ${\cal O} \left( N_c \right) \sim {\cal O}\left(N_f\right)$ and with a
non-vanishing matter density, is holographically described by an
AdS$_2$-geometry in the IR. We demonstrate that, superconductor/superfluid
instabilities are facilitated and spontaneous breaking of translational
invariance is inhibited with increasing values of $\left(N_f / N_c \right) $.
This is similar, in spirit, with known results in large $N_c$ Quantum
Chromodynamics with $N_f$ quarks and a non-vanishing density, in which the
chiral density wave phase becomes suppressed and superconducting instabilities
become favoured as the number of quarks is increased.Comment: 24 pages, 2 figure | Flavours and Infra-red Instability in Holography | flavours and infra-red instability in holography | phenomenological holographic einstein cosmological dirac born infeld chern simons explore fate violation fluctuation geometry. capture vanishing holographically superconductor superfluid instabilities facilitated spontaneous breaking translational invariance inhibited spirit chromodynamics quarks vanishing chiral suppressed superconducting instabilities favoured quarks pages | non_dup | [] |
93951348 | 10.1007/JHEP11(2017)102 | Quantum radiated power emitted by an Unruh-DeWitt (UD) detector in linear
oscillatory motion in (3+1)D Minkowski space, with the internal harmonic
oscillator minimally coupled to a massless scalar field, is obtained
non-perturbatively by numerical method. The signal of the Unruh-like effect
experienced by the detector is found to be pronounced in quantum radiation in
the highly non-equilibrium regime with high averaged acceleration and short
oscillatory cycle, and the signal would be greatly suppressed by quantum
interference when the averaged proper acceleration is sufficiently low. An
observer at a fixed angle would see periods of negative radiated power in each
cycle of motion, while the averaged radiated power over a cycle is always
positive as guaranteed by the quantum inequalities. Coherent high harmonic
generation and down conversion are identified in the detector's quantum
radiation. Due to the overwhelming largeness of the vacuum correlators of the
free field, the asymptotic reduced state of the harmonics of the radiation
field is approximately a direct product of the squeezed thermal states.Comment: 30 pages, 10 figures, partly based on [arXiv:1601.07006 | Quantum radiation by an Unruh-DeWitt detector in oscillatory motion | quantum radiation by an unruh-dewitt detector in oscillatory motion | radiated emitted unruh dewitt oscillatory minkowski harmonic oscillator minimally massless perturbatively method. unruh experienced pronounced averaged acceleration oscillatory greatly suppressed interference averaged proper acceleration sufficiently low. observer radiated averaged radiated guaranteed inequalities. coherent harmonic conversion radiation. overwhelming largeness correlators asymptotic harmonics squeezed pages partly | non_dup | [] |
83870318 | 10.1007/JHEP11(2017)103 | The thermodynamics of quantum chromodynamics at low temperatures and in
sufficiently strong magnetic fields is governed by neutral pions. We analyze
the interacting system of neutral pions and photons at zero baryon chemical
potential using effective field theory. As a consequence of the axial anomaly
and the external magnetic field, the pions and photons mix with one another.
The resulting spectrum contains one usual, relativistic photon state, and two
nonrelativistic modes, one of which is gapless and the other gapped.
Furthermore, we calculate the leading, one-loop contribution to the pressure of
the system. In the chiral limit, a closed analytic expression for the pressure
exists, which features an unusual scaling with temperature and magnetic field,
$T^3B/f_\pi$, at low temperatures, $T\ll B/f_\pi$. Finally, we determine the
pion decay rate as a function of the magnetic field at the tree level. The
result is affected by a competition of the anisotropic kinematics and the
enlarged phase space due to the anomalous mass of the neutral pion. In the
chiral limit, the decay rate scales as $B^3/f_\pi^5$.Comment: 1+19 pages, v2: matches published versio | Anomalous low-temperature thermodynamics of QCD in strong magnetic
fields | anomalous low-temperature thermodynamics of qcd in strong magnetic fields | thermodynamics chromodynamics sufficiently governed neutral pions. analyze interacting neutral pions photons baryon theory. axial anomaly pions photons another. usual relativistic nonrelativistic gapless gapped. system. chiral analytic unusual pion level. competition anisotropic kinematics enlarged anomalous neutral pion. chiral .comment pages matches versio | non_dup | [] |
83836305 | 10.1007/JHEP11(2017)104 | We use the gauge gravity correspondence to study the renormalization group
flow of a double trace fermionic operator in a quark-gluon plasma subject to
the influence of a strong magnetic field and compare it with the results for
the case at zero temperature and no magnetic field, where the flow between two
fixed points is observed. Our results show that the energy necessary to access
the physics of the ultraviolet theory increases with the intensity of the
magnetic field under which the processes happen. We provide arguments to
support that this increase is scheme independent, and to exhibit further
evidence we do a very simple calculation showing that the dimensional reduction
expected in the gauge theory in this scenario is effective up to an energy
scale that grows with the strength of such a background field. We also show
that independently of the renormalization scheme, the coupling of the double
trace operators in the ultraviolet fixed point increases with the intensity of
the background field. These effects combined can change both, the processes
that are expected to be involved in a collision experiment at a given energy
and the azimuthal anisotropy of the measurements resulting of them.Comment: 23 pages, 10 figures. Added section about renormalization scheme
independenc | Increase of the Energy Necessary to Probe Ultraviolet Theories Due to
the Presence of a Strong Magnetic Field | increase of the energy necessary to probe ultraviolet theories due to the presence of a strong magnetic field | correspondence renormalization trace fermionic gluon observed. ultraviolet happen. arguments exhibit grows field. independently renormalization trace ultraviolet field. collision azimuthal anisotropy pages figures. renormalization independenc | non_dup | [] |
83847292 | 10.1007/JHEP11(2017)105 | We obtain finite-temperature M2 black branes in 11-dimensional supergravity,
in a $G_4$-flux background whose self-dual part approaches a solution of
Cveti\v{c}, Gibbons, L\"u, and Pope, based upon Stenzel's family of Ricci-flat
K\"ahler deformed cones. Our solutions are asymptotically $AdS_4$ times a
7-dimensional Stiefel manifold $V_{5,2}$, and the branes are ``smeared'' to
retain $SO(5)$ symmetry in the internal space. The solutions represent a mass
deformation of the corresponding dual $CFT_3$, whose full description is at
this time only partially-understood. We investigate the possibility of a
confinement/de-confinement phase transition analogous to the $AdS_5 \times S^5$
case, and a possible Gregory-Laflamme type instability which could lead to
polarised brane solutions which break $SO(5)$. We discuss possible consequences
for AdS/CFT and the KKLT cosmological uplift mechanism.Comment: 33 pages, 3 figure | Mass-deformed M2 branes in Stenzel space | mass-deformed m2 branes in stenzel space | branes supergravity cveti gibbons pope stenzel ricci ahler deformed cones. asymptotically stiefel manifold branes smeared retain space. deformation partially understood. confinement confinement analogous gregory laflamme instability polarised brane break consequences kklt cosmological uplift pages | non_dup | [] |
84331317 | 10.1007/JHEP11(2017)106 | The Two-Higgs-Doublet model (2HDM) is a simple and viable extension of the
Standard Model (SM) with a scalar potential complex enough that two minima may
coexist. In this work we investigate if the procedure to identify our vacuum as
the global minimum by tree-level formulas carries over to the one-loop
corrected potential. In the CP conserving case, we identify two distinct types
of coexisting minima --- the regular ones (moderate $\tan\beta$) and the
non-regular ones (small or large $\tan\beta$) --- and conclude that the tree
level expectation fails only for the non-regular type of coexisting minima. For
the regular type, the sign of $m^2_{12}$ already precisely indicates which
minima is the global one, even at one-loop.Comment: to appear in JHE | One-loop considerations for coexisting vacua in the CP conserving 2HDM | one-loop considerations for coexisting vacua in the cp conserving 2hdm | doublet viable minima coexist. formulas carries corrected potential. conserving coexisting minima moderate beta beta expectation fails coexisting minima. precisely minima | non_dup | [] |
83837079 | 10.1007/JHEP11(2017)107 | Three related analyses of $\phi^4$ theory with $O(N)$ symmetry are presented.
In the first, we review the $O(N)$ model over the $p$-adic numbers and the
discrete renormalization group transformations which can be understood as spin
blocking in an ultrametric context. We demonstrate the existence of a
Wilson-Fisher fixed point using an $\epsilon$ expansion, and we show how to
obtain leading order results for the anomalous dimensions of low dimension
operators near the fixed point. Along the way, we note an important aspect of
ultrametric field theories, which is a non-renormalization theorem for kinetic
terms. In the second analysis, we employ large $N$ methods to establish
formulas for anomalous dimensions which are valid equally for field theories
over the $p$-adic numbers and field theories on $\mathbb{R}^n$. Results for
anomalous dimensions agree between the first and second analyses when they can
be meaningfully compared. In the third analysis, we consider higher derivative
versions of the $O(N)$ model on $\mathbb{R}^n$, the simplest of which has been
studied in connection with spatially modulated phases. Our general formula for
anomalous dimensions can still be applied. Analogies with two-derivative
theories hint at the existence of some interesting unconventional field
theories in four real Euclidean dimensions.Comment: 44 pages, 8 figure | O(N) and O(N) and O(N) | o(n) and o(n) and o(n) | presented. adic renormalization transformations understood blocking ultrametric context. wilson fisher epsilon anomalous point. aspect ultrametric renormalization terms. employ establish formulas anomalous valid equally adic mathbb anomalous agree meaningfully compared. versions mathbb simplest connection spatially modulated phases. anomalous applied. analogies hint unconventional euclidean pages | non_dup | [] |
83867445 | 10.1007/JHEP11(2017)108 | The most dramatic "Sommerfeld enhancements" of neutral-wino-pair annihilation
occur when the wino mass is near a critical value where there is a zero-energy
S-wave resonance at the neutral-wino-pair threshold. Near such a critical mass,
low-energy winos can be described by a zero-range effective field theory in
which the winos interact nonperturbatively through a contact interaction. The
effective field theory is controlled by a renormalization-group fixed point at
which the neutral and charged winos are degenerate in mass and their scattering
length is infinite. The parameters of the zero-range effective field theory can
be determined by matching wino-wino scattering amplitudes calculated by solving
the Schr\"odinger equation for winos interacting through a potential due to the
exchange of weak gauge bosons. If the wino mass is larger than the critical
value, the resonance is a wino-pair bound state. The power of the zero-range
effective field theory is illustrated by calculating the rate for formation of
the bound state in the collision of two neutral winos through the emission of
two soft photons.Comment: 63 pages, 22 figures, Corrected typos in version | Zero-Range Effective Field Theory for Resonant Wino Dark Matter I.
Framework | zero-range effective field theory for resonant wino dark matter i. framework | dramatic sommerfeld enhancements neutral wino annihilation wino neutral wino threshold. winos winos interact nonperturbatively interaction. renormalization neutral winos degenerate infinite. matching wino wino amplitudes solving schr odinger winos interacting bosons. wino wino state. illustrated calculating collision neutral winos pages corrected typos | non_dup | [] |
93937225 | 10.1007/JHEP11(2017)109 | The $R_{K^{(*)}}$ anomaly can be explained by tree level exchange of
leptoquarks. We study the consequences of subjecting these models to the
principle of minimal flavor violation (MFV). We consider MFV in the linear
regime, and take the charged lepton Yukawa matrix to be the only spurion that
violates lepton flavor universality. We find that a combination of constraints
from a variety of processes -- $b\to s\mu\mu$, $b\to s\tau\tau$, $b\to
s\nu\nu$, $b\bar b\to\tau\tau$ and $b\to c\tau\nu$ -- excludes MFV in these
models.Comment: Version published in JHEP, 15 pages, 1 figur | Testing Minimal Flavor Violation in Leptoquark Models of the
$R_{K^{(*)}}$ Anomaly | testing minimal flavor violation in leptoquark models of the $r_{k^{(*)}}$ anomaly | anomaly leptoquarks. consequences subjecting flavor violation lepton yukawa spurion violates lepton flavor universality. excludes jhep pages figur | non_dup | [] |
84330140 | 10.1007/JHEP11(2017)110 | We introduce and study renormalization group interfaces between two
holographic conformal theories which are related by deformation by a scalar
double trace operator. At leading order in the 1/N expansion, we derive
expressions for the two point correlation functions of the scalar, as well as
the spectrum of operators living on the interface. We also compute the
interface contribution to the sphere partition function, which in two
dimensions gives the boundary g factor. Checks of our proposal include
reproducing the g factor and some defect overlap coefficients of Gaiotto's RG
interfaces at large N, and the two-point correlation function whenever
conformal perturbation theory is valid.Comment: 59 pages, 2 figure | Double Trace Interfaces | double trace interfaces | renormalization interfaces holographic conformal deformation trace operator. derive expressions living interface. sphere partition factor. checks proposal reproducing defect overlap gaiotto interfaces whenever conformal perturbation pages | non_dup | [] |
86420141 | 10.1007/JHEP11(2017)111 | Light-cone cuts have recently been proposed as a method to reconstruct the
conformal metric of a holographic spacetime. We explore how additional
information about the bulk geometry gets encoded in the structure of these
light-cone cuts. In particular, we study how the hyperbolic angle related to a
cusp in the light-cone cut encodes information about the matter content of the
spacetime. We provide an explicit numerical example reconstructing the metric
for a 4- dimensional spacetime composed by the superposition of a boson star
and a gas of radiation in AdS.Comment: 18 pages, 9 figure | Reconstruction of an AdS Radiation/Boson Star Bulk Geometry Using
Light-cone Cuts | reconstruction of an ads radiation/boson star bulk geometry using light-cone cuts | cone cuts reconstruct conformal holographic spacetime. explore gets encoded cone cuts. hyperbolic cusp cone encodes spacetime. reconstructing spacetime composed superposition boson pages | non_dup | [] |
84331996 | 10.1007/JHEP11(2017)112 | In this paper we propose (0,2) mirrors for general Fano toric varieties with
special tangent bundle deformations, corresponding to subsets of toric
deformations. Our mirrors are of the form of (B/2-twisted) (0,2)
Landau-Ginzburg models, matching Hori-Vafa mirrors on the (2,2) locus. We
compare our predictions to (0,2) mirrors obtained by Chen et al for certain
examples of toric varieties, and find that they match. We also briefly outline
conjectures for analogous results for hypersurfaces in Fano toric varieties.
Our methods utilize results from supersymmetric localization, which allows us
to incidentally gain occasional further insights into GLSM-based (2,2) mirror
constructions. For example, we explicitly verify that closed-string correlation
functions of the original A-twisted GLSM match those of the mirror B-twisted
Landau-Ginzburg model, as well as (0,2) deformations thereof.Comment: 52 pages, LaTeX; v2: miscellaneous writing updates, typos fixe | A proposal for (0,2) mirrors of toric varieties | a proposal for (0,2) mirrors of toric varieties | propose mirrors fano toric varieties tangent bundle deformations subsets toric deformations. mirrors twisted landau ginzburg matching hori vafa mirrors locus. mirrors toric varieties match. briefly outline conjectures analogous hypersurfaces fano toric varieties. utilize supersymmetric localization incidentally occasional insights glsm mirror constructions. explicitly verify twisted glsm match mirror twisted landau ginzburg deformations pages latex miscellaneous writing updates typos fixe | non_dup | [] |
129349553 | 10.1007/JHEP11(2017)113 | Action principles for the single and double valued continuous-spin
representations of the Poincare group have been recently proposed in a
Segal-like formulation. We address three related issues: First, we explain how
to obtain these actions directly from the Fronsdal-like and Fang-Fronsdal-like
equations by solving the traceless constraints in Fourier space. Second, we
introduce a current, similar to the one of Berends, Burgers and Van Dam, which
is bilinear in a pair of scalar matter fields, to which the bosonic
continuous-spin field can couple minimally. Third, we investigate the current
exchange mediated by a continuous-spin particle obtained from this action
principle and investigate whether it propagates the right degrees of freedom,
and whether it reproduces the known result for massless higher-spin fields in
the helicity limit.Comment: 31 pages, no figur | Continuous-spin field propagator and interaction with matter | continuous-spin field propagator and interaction with matter | principles valued representations poincare segal formulation. fronsdal fang fronsdal solving traceless fourier space. berends burgers bilinear bosonic couple minimally. propagates freedom reproduces massless helicity pages figur | non_dup | [] |
86419861 | 10.1007/JHEP11(2017)114 | We present general formulae to compute Wilson line correlators with the Color
Glass Condensate described by the McLerran-Venugopalan model. We explicitly
construct a complete and non-orthogonal set of color-singlet bases and write
matrix elements down, so that the exponential of the matrix leads to the Wilson
line correlators. We further develop a systematic perturbative expansion of
dipole Wilson line correlators in terms of $1/N_c$ where $N_c$ is the color
number. As a phenomenological application we calculate the flow harmonics
$v_n\{m\}$ in the dipole model and discuss the $N_c$ scaling.Comment: 19 pages, 4 figure | General formulae for dipole Wilson line correlators with the Color Glass
Condensate | general formulae for dipole wilson line correlators with the color glass condensate | formulae wilson correlators glass condensate mclerran venugopalan model. explicitly orthogonal singlet bases exponential wilson correlators. perturbative dipole wilson correlators number. phenomenological harmonics dipole pages | non_dup | [] |
93947233 | 10.1007/JHEP11(2017)115 | We discuss USp(2n) supersymmetric models with eight fundamental fields and a
field in the antisymmetric representation. Turning on the most generic
superpotentials, coupling pairs of fundamental fields to powers of the
antisymmetric field while preserving an R symmetry, we give evidence for the
statement that the models are connected by a large network of dualities which
can be organized into orbits of the Weyl group of E_8. We make also several
curious observations about such models. In particular, we argue that a USp(2m)
model with the addition of singlet fields and even rank m flows in the IR to a
CFT with E_7 U(1) symmetry. We also discuss an infinite number of duals for the
USp(2) theory with eight fundamentals and no superpotential.Comment: 15 pages, harvmac. v2: added reference | E_8 orbits of IR dualities | e_8 orbits of ir dualities | supersymmetric eight antisymmetric representation. turning generic superpotentials powers antisymmetric preserving statement dualities organized orbits weyl curious models. argue singlet flows symmetry. infinite duals eight fundamentals pages harvmac. | non_dup | [] |
83868181 | 10.1007/JHEP11(2017)116 | We study structure constants of local operators inserted on the Wilson loop
in ${\cal N}=4$ super Yang-Mills theory. We compute the structure constants in
the SU(2) sector at tree level using the correspondence between operators on
the Wilson loop and the open spin chain. The results are interpreted as the
summation over all possible ways of changing the signs of magnon momenta in the
hexagon form factors. This is consistent with a holographic description of the
correlator as the cubic open string vertex, which consists of one hexagonal
patch and three boundaries. We then conjecture that a similar expression should
hold also at finite coupling.Comment: 38 pages; v3: JHEP published versio | Structure constants of operators on the Wilson loop from integrability | structure constants of operators on the wilson loop from integrability | inserted wilson super mills theory. correspondence wilson chain. interpreted summation ways changing signs magnon momenta hexagon factors. holographic correlator cubic hexagonal patch boundaries. conjecture hold pages jhep versio | non_dup | [] |
84331132 | 10.1007/JHEP11(2017)117 | As sequel to a recent paper we examine the phenomenology of the full
electroweakino sector of the pMSSM without invoking the adhoc but often
employed assumption that the heavier ones are decoupled. We identify several
generic models which illustrate the importance of the heavier electroweakinos
and constrain them with the LHC $3l$ + ${E\!\!\!\!/_T}$ data. The constraints
are usually stronger than that for decoupled heavier electroweakinos indicating
that the LHC data is already sensitive to their presence. We also take into
account the constraints from the observed dark matter relic density of the
universe and precisely measured anomalous magnetic moment of the muon. Using
the allowed parameter space thus obtained, we show that in addition to the
conventional $3l$ + ${E\!\!\!\!/_T}$ signatures novel multilepton ($ml$) +
${E\!\!\!\!/_T}$ final states with $m > 3$, which are not viable in models with
lighter electroweakinos only, can be observed before the next long shut down of
the LHC.Comment: 40 pages, 5 figure | Multilepton signals of heavier electroweakinos at the LHC | multilepton signals of heavier electroweakinos at the lhc | sequel examine phenomenology electroweakino pmssm invoking adhoc heavier decoupled. generic illustrate heavier electroweakinos constrain data. stronger decoupled heavier electroweakinos presence. relic universe precisely anomalous moment muon. signatures multilepton viable lighter electroweakinos shut pages | non_dup | [] |
78508407 | 10.1007/JHEP11(2017)121 | We show that superpositions of classical states in quantum gravity with fixed
topology can lead to new classical states with a different topology. We study
this phenomenon in a particular limit of the LLM geometries. In this limit, the
UV complete minisuperspace of allowed quantum states is exactly given by the
Hilbert space of a free chiral boson in two dimensions. We construct this
chiral boson purely in terms of combinatorial objects associated with the
permutation group. As a byproduct of this analysis, we re-derive the
Murnaghan-Nakayama rule for characters of the permutation group. We are able to
express this rule in terms of operator relations for raising and lowering
operators on the Hilbert space of states in a free fermion basis. Our
construction provides a preferred notion of bulk locality by studying an
appropriate notion of D-brane state generating functions. We describe how
multi-droplet LLM geometries with different topologies give new classical
limits of the free chiral boson, even though they can be written as
superpositions of coherent states with trivial topology. As a consequence,
topology cannot be accessed by a single operator measurement in this quantum
system. We study other non-linear measurements in the quantum wave-function,
based on uncertainty and entanglement between modes of the chiral boson, that
can be used as order parameters to measure the topology of such states.Comment: 87 pages (incl. appendices). v2: updated reference | Superposition induced topology changes in quantum gravity | superposition induced topology changes in quantum gravity | superpositions topology topology. phenomenon geometries. minisuperspace hilbert chiral boson dimensions. chiral boson purely combinatorial permutation group. byproduct derive murnaghan nakayama characters permutation group. express raising lowering hilbert fermion basis. preferred notion locality studying notion brane generating functions. droplet geometries topologies chiral boson superpositions coherent trivial topology. topology accessed system. entanglement chiral boson topology pages incl. appendices updated | non_dup | [] |
83832901 | 10.1007/JHEP11(2017)123 | Superstring field theory gives expressions for heterotic and type II string
loop amplitudes that are free from ultraviolet and infrared divergences when
the number of non-compact space-time dimensions is five or more. We prove the
subleading soft graviton theorem in these theories to all orders in
perturbation theory for S-matrix elements of arbitrary number of finite energy
external states but only one external soft graviton. We also prove the leading
soft graviton theorem for arbitrary number of finite energy external states and
arbitrary number of soft gravitons. Since our analysis is based on general
properties of one particle irreducible effective action, the results are valid
in any theory of quantum gravity that gives finite result for the S-matrix
order by order in perturbation theory without violating general coordinate
invariance.Comment: LaTeX file, 20 pages; v2: added explanation for dropping terms
involving Christoffel symbols from the covariant derivatives; v3: references
updated, other minor change | Subleading Soft Graviton Theorem for Loop Amplitudes | subleading soft graviton theorem for loop amplitudes | superstring expressions heterotic amplitudes ultraviolet infrared divergences more. subleading graviton orders perturbation graviton. graviton gravitons. irreducible valid perturbation violating coordinate latex file pages explanation dropping involving christoffel symbols covariant derivatives updated minor | non_dup | [] |
84093607 | 10.1007/JHEP11(2017)124 | We analyze exotic matter representations that arise on singular seven-brane
configurations in F-theory. We develop a general framework for analyzing such
representations, and work out explicit descriptions for models with matter in
the 2-index and 3-index symmetric representations of SU($N$) and SU(2)
respectively, associated with double and triple point singularities in the
seven-brane locus. These matter representations are associated with Weierstrass
models whose discriminants vanish to high order thanks to nontrivial
cancellations possible only in the presence of a non-UFD algebraic structure.
This structure can be described using the normalization of the ring of
intrinsic local functions on a singular divisor. We consider the connection
between geometric constraints on singular curves and corresponding constraints
on the low-energy spectrum of 6D theories, identifying some new examples of
apparent "swampland" theories that cannot be realized in F-theory but have no
apparent low-energy inconsistency.Comment: 71 page | Exotic matter on singular divisors in F-theory | exotic matter on singular divisors in f-theory | analyze exotic representations arise singular seven brane configurations theory. analyzing representations descriptions representations triple singularities seven brane locus. representations weierstrass discriminants vanish thanks nontrivial cancellations algebraic structure. normalization intrinsic singular divisor. connection geometric singular identifying apparent swampland realized apparent | non_dup | [] |
93937594 | 10.1007/JHEP11(2017)125 | We study models in which reheating happens only through non-perturbative
processes. The energy transferred can be exponentially suppressed unless the
inflaton is coupled to a particle with a parametrically small mass.
Additionally, in some models a light scalar with a negative mass squared
parameter leads to much more efficient reheating than one with a positive mass
squared of the same magnitude. If a theory contains many sectors similar to the
Standard Model coupled to the inflaton via their Higgses, such dynamics can
realise the Nnaturalness solution to the hierarchy problem. A sector containing
a light Higgs with a non-zero vacuum expectation value is dominantly reheated
and there is little energy transferred to the other sectors, consistent with
cosmological constraints. The inflaton must decouple from other particles and
have a flat potential at large field values, in which case the visible sector
UV cutoff can be raised to 10 TeV in a simple model.Comment: 22 pages, 4 figure | Non-perturbative reheating and Nnaturalness | non-perturbative reheating and nnaturalness | reheating happens perturbative processes. transferred exponentially suppressed unless inflaton parametrically mass. additionally squared reheating squared magnitude. sectors inflaton higgses realise nnaturalness hierarchy problem. expectation dominantly reheated transferred sectors cosmological constraints. inflaton decouple visible cutoff raised pages | non_dup | [] |
93946945 | 10.1007/JHEP11(2017)126 | We treat the topic of the closures of the nilpotent orbits of the Lie
algebras of Exceptional groups through their descriptions as moduli spaces, in
terms of Hilbert series and the highest weight generating functions for their
representation content. We extend the set of known Coulomb branch quiver theory
constructions for Exceptional group minimal nilpotent orbits, or reduced single
instanton moduli spaces, to include all orbits of Characteristic Height 2,
drawing on extended Dynkin diagrams and the unitary monopole formula. We also
present a representation theoretic formula, based on localisation methods, for
the normal nilpotent orbits of the Lie algebras of any Classical or Exceptional
group. We analyse lower dimensioned Exceptional group nilpotent orbits in terms
of Hilbert series and the Highest Weight Generating functions for their
decompositions into characters of irreducible representations and/or Hall
Littlewood polynomials. We investigate the relationships between the moduli
spaces describing different nilpotent orbits and propose candidates for the
constructions of some non-normal nilpotent orbits of Exceptional algebras.Comment: 87 pages, 4 figure | Quiver Theories and Formulae for Nilpotent Orbits of Exceptional
Algebras | quiver theories and formulae for nilpotent orbits of exceptional algebras | treat topic closures nilpotent orbits algebras exceptional descriptions moduli hilbert generating content. extend coulomb branch quiver constructions exceptional nilpotent orbits instanton moduli orbits drawing dynkin diagrams unitary monopole formula. theoretic localisation nilpotent orbits algebras exceptional group. analyse dimensioned exceptional nilpotent orbits hilbert generating decompositions characters irreducible representations hall littlewood polynomials. moduli describing nilpotent orbits propose candidates constructions nilpotent orbits exceptional pages | non_dup | [] |
83851589 | 10.1007/JHEP11(2017)127 | The transverse momentum distribution of the Higgs at large $P_T$ is
complicated by its dependence on three important energy scales: $P_T$, the top
quark mass $m_t$, and the Higgs mass $m_H$. A strategy for simplifying the
calculation of the cross section at large $P_T$ is to calculate only the
leading terms in its expansion in $m_t^2/P_T^2$ and/or $m_H^2/P_T^2$. The
expansion of the cross section in inverse powers of $P_T$ is complicated by
logarithms of $P_T$ and by mass singularities. In this paper, we consider the
top-quark loop contribution to the subprocess $q\bar{q}\to H+g$ at leading
order in $\alpha_s$. We show that the leading power of $1/P_T^2$ can be
expressed in the form of a factorization formula that separates the large scale
$P_T$ from the scale of the masses. All the dependence on $m_t$ and $m_H$ can
be factorized into a distribution amplitude for $t \bar t$ in the Higgs, a
distribution amplitude for $t \bar t$ in a real gluon, and an endpoint
contribution. The factorization formula can be used to simplify calculations of
the $P_T$ distribution at large $P_T$ to next-to-leading order in $\alpha_s$.Comment: 49 pages, 8 figure | Mass Dependence of Higgs Production at Large Transverse Momentum | mass dependence of higgs production at large transverse momentum | complicated simplifying powers complicated logarithms singularities. subprocess alpha factorization separates masses. factorized gluon endpoint contribution. factorization simplify alpha .comment pages | non_dup | [] |
129352308 | 10.1007/JHEP11(2017)128 | It is shown that the notion of Conformal Mass can be defined within a given
anti-de Sitter (AdS) branch of a Lovelock gravity theory as long as the
corresponding vacuum is not degenerate. Indeed, conserved charges obtained by
the addition of Kounterterms to the bulk action turn out to be proportional to
the electric part of the Weyl tensor, when the fall-off of a generic solution
in that AdS branch is considered. The factor of proportionality is the
degeneracy condition for the vacua in the particular Lovelock AdS theory under
study. This last feature explains the obstruction to define Conformal Mass in
the degenerate case.Comment: 22 pages, no figures, a few references adde | Vacuum Degeneracy and Conformal Mass in Lovelock AdS Gravity | vacuum degeneracy and conformal mass in lovelock ads gravity | notion conformal sitter branch lovelock degenerate. conserved charges kounterterms weyl fall generic branch considered. proportionality degeneracy vacua lovelock study. explains obstruction conformal degenerate pages adde | non_dup | [] |
93951507 | 10.1007/JHEP11(2017)129 | We investigate the variation of the charged anti-de Sitter black hole under
charged particle absorption by considering thermodynamic volume. The variation
exactly corresponds to that expected as the first law of thermodynamics.
Nevertheless, we find the decrease of the Bekenstein-Hawking entropy for
extremal and near-extremal black holes under the absorption to be an
irreversible process. This violation of the second law of thermodynamics is
only found in the case considering thermodynamic volume. We test the weak
cosmic censorship conjecture affected by the violation. Fortunately, the
conjecture is still valid. However, extremal and near-extremal black holes do
not change their configurations under the absorption. This is quite different
from the case without thermodynamic volume.Comment: 14 pages, 5 figure | Thermodynamics with Pressure and Volume under Charged Particle
Absorption | thermodynamics with pressure and volume under charged particle absorption | sitter thermodynamic volume. thermodynamics. nevertheless bekenstein hawking extremal extremal holes irreversible process. violation thermodynamics thermodynamic volume. cosmic censorship conjecture violation. fortunately conjecture valid. extremal extremal holes configurations absorption. thermodynamic pages | non_dup | [] |
93945985 | 10.1007/JHEP11(2017)130 | String-localized quantum fields transforming in Wigner's infinite-spin
representations were introduced by Mund, Schroer and Yngvason. We construct
these fields as limits of fields of finite mass $m\to 0$ and finite spin
$s\to\infty$. We determine a string-localized infinite-spin quantum
stress-energy tensor with a novel prescription that does not refer to a
classical Lagrangean.Comment: v3: 35 pages. Version as published. v2: Two substantial mistakes
fixed, Sect. 2, 3, and 4 more appropriately organize | Pauli-Lubanski limit and stress-energy tensor for infinite-spin fields | pauli-lubanski limit and stress-energy tensor for infinite-spin fields | localized transforming wigner infinite representations mund schroer yngvason. infty localized infinite prescription pages. published. substantial mistakes sect. appropriately organize | non_dup | [] |
83862449 | 10.1007/JHEP11(2017)131 | We study out-of-time-ordered correlation functions in permutation orbifolds
at large central charge. We show that they do not decay at late times for
arbitrary choices of low-dimension operators, indicating that permutation
orbifolds are non-chaotic theories. This is in agreement with the fact they are
free discrete gauge theories and should be integrable rather than chaotic. We
comment on the early-time behaviour of the correlators as well as the
deformation to strong coupling.Comment: 15 pages, v2: more references and additional comments in the
introductio | Permutation Orbifolds and Chaos | permutation orbifolds and chaos | ordered permutation orbifolds charge. choices permutation orbifolds chaotic theories. integrable chaotic. comment correlators deformation pages comments introductio | non_dup | [] |
84327148 | 10.1007/JHEP11(2017)132 | We study the implications of dark matter searches, together with collider
constraints, on the phenomenological MSSM with neutralino dark matter and focus
on the consequences of the related uncertainties in some detail. We consider,
inter alia, the latest results from AMS-02, Fermi-LAT and XENON1T. In
particular, we examine the impact of the choice of the dark matter halo
profile, as well as the propagation model for cosmic rays, for dark matter
indirect detection and show that the constraints on the MSSM differ by one to
two orders of magnitude depending on the astrophysical hypotheses. On the other
hand, our limited knowledge of the local relic density in the vicinity of the
Earth and the velocity of Earth in the dark matter halo leads to a factor 3 in
the exclusion limits obtained by direct detection experiments. We identified
the astrophysical models leading to the most conservative and the most
stringent constraints and for each case studied the complementarities with the
latest LHC measurements and limits from Higgs, SUSY and monojet searches. We
show that combining all data from dark matter searches and colliders, a large
fraction of our supersymmetric sample could be probed. Whereas the direct
detection constraints are rather robust under the astrophysical assumptions,
the uncertainties related to indirect detection can have an important impact on
the number of the excluded points.Comment: 32 pages, 26 figures. v2: update of the conservative scenario for the
astrophysical uncertainties, references adde | Robustness of dark matter constraints and interplay with collider
searches for New Physics | robustness of dark matter constraints and interplay with collider searches for new physics | searches collider phenomenological mssm neutralino consequences detail. alia latest fermi xenon examine halo propagation cosmic rays indirect mssm orders astrophysical hypotheses. relic vicinity earth earth halo exclusion experiments. astrophysical conservative stringent complementarities latest susy monojet searches. combining searches colliders supersymmetric probed. robust astrophysical assumptions indirect excluded pages figures. update conservative astrophysical adde | non_dup | [] |