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42745022 | 10.1007/JHEP10(2016)120 | We construct a new class of 4-dimensional z=2 Lifshitz black branes that have
a nonzero linear momentum. These are solutions of an Einstein-Proca-dilaton
model that can be obtained by Scherk-Schwarz circle reduction of AdS_5 gravity
coupled to a free real scalar field. The boundary of a bulk Lifshitz space-time
is a Newton-Cartan geometry. We show that the fluid dual to the moving Lifshitz
black brane leads to a novel form of Lifshitz hydrodynamics on a Newton-Cartan
space-time. Since the linear momentum of the black brane cannot be obtained by
a boost transformation the velocity of the fluid or rather, by boundary
rotational invariance, its magnitude plays the role of a chemical potential.
The conjugate dual variable is mass density. The Lifshitz perfect fluid can be
thought of as arising from a Schroedinger perfect fluid with broken particle
number symmetry.Comment: 26 pages + 20 pages appendi | Lifshitz Hydrodynamics from Lifshitz Black Branes with Linear Momentum | lifshitz hydrodynamics from lifshitz black branes with linear momentum | lifshitz branes nonzero momentum. einstein proca dilaton scherk schwarz circle field. lifshitz newton cartan geometry. moving lifshitz brane lifshitz hydrodynamics newton cartan time. brane boost rotational invariance plays potential. conjugate density. lifshitz perfect thought arising schroedinger perfect broken pages pages appendi | non_dup | [] |
42726318 | 10.1007/JHEP10(2016)121 | We consider supersymmetric near-horizon geometries in heterotic supergravity
up to two loop order in sigma model perturbation theory. We identify the
conditions for the horizons to admit enhancement of supersymmetry. We show that
solutions which undergo supersymmetry enhancement exhibit an sl(2,R) symmetry,
and we describe the geometry of their horizon sections. We also prove a
modified Lichnerowicz type theorem, incorporating $\alpha'$ corrections, which
relates Killing spinors to zero modes of near-horizon Dirac operators.
Furthermore, we demonstrate that there are no AdS2 solutions in heterotic
supergravity up to second order in $\alpha'$ for which the fields are smooth
and the internal space is smooth and compact without boundary. We investigate a
class of nearly supersymmetric horizons, for which the gravitino Killing spinor
equation is satisfied on the spatial cross sections but not the dilatino one,
and present a description of their geometry.Comment: 55 pages, late | Anomaly Corrected Heterotic Horizons | anomaly corrected heterotic horizons | supersymmetric horizon geometries heterotic supergravity sigma perturbation theory. horizons admit enhancement supersymmetry. undergo supersymmetry enhancement exhibit horizon sections. lichnerowicz incorporating alpha relates killing spinors horizon dirac operators. heterotic supergravity alpha boundary. nearly supersymmetric horizons gravitino killing spinor satisfied dilatino pages | non_dup | [] |
42750466 | 10.1007/JHEP10(2016)123 | We present the results of the computation of the next-to-leading order QCD
corrections to the production cross section of a Higgs boson in association
with a top-antitop pair at the LHC, including the three relevant dimension-six
operators ($O_{t \varphi }, O_{\varphi G}, O_{tG}$) of the standard model
effective field theory. These operators also contribute to the production of
Higgs bosons in loop-induced processes at the LHC, such as inclusive Higgs,
$Hj$ and $HH$ production, and modify the Higgs decay branching ratios for which
we also provide predictions. We perform a detailed study of the cross sections
and their uncertainties at the total as well as differential level and of the
structure of the effective field theory at NLO including renormalisation group
effects. Finally, we show how the combination of information coming from
measurements of these production processes will allow to constrain the three
operators at the current and future LHC runs. Our results lead to a significant
improvement of the accuracy and precision of the deviations expected from
higher-dimensional operators in the SM in both the top-quark and the
Higgs-boson sectors and provide a necessary ingredient for performing a global
EFT fit to the LHC data at NLO accuracy.Comment: typos in figures 7 & 12 correcte | Higgs production in association with a top-antitop pair in the Standard
Model Effective Field Theory at NLO in QCD | higgs production in association with a top-antitop pair in the standard model effective field theory at nlo in qcd | boson antitop varphi varphi theory. bosons inclusive modify branching predictions. renormalisation effects. coming constrain runs. precision deviations boson sectors ingredient performing typos correcte | non_dup | [] |
73358748 | 10.1007/JHEP10(2016)124 | The splitting processes of bremsstrahlung and pair production in a medium are
coherent over large distances in the very high energy limit, which leads to a
suppression known as the Landau-Pomeranchuk-Migdal (LPM) effect. In this paper,
we continue study of the case when the coherence lengths of two consecutive
splitting processes overlap (which is important for understanding corrections
to standard treatments of the LPM effect in QCD), avoiding soft-gluon
approximations. In particular, this paper completes the calculation of the rate
for real double gluon bremsstrahlung from an initial gluon with various
simplifying assumptions (thick media; $\hat q$ approximation; and large $N_c$)
by now including processes involving 4-gluon vertices.Comment: 35 pages, 17 figures [changes from v1: minor typo fixes and minor
referencing updates | The LPM effect in sequential bremsstrahlung: 4-gluon vertices | the lpm effect in sequential bremsstrahlung: 4-gluon vertices | splitting bremsstrahlung coherent distances suppression landau pomeranchuk migdal effect. continue coherence lengths consecutive splitting overlap treatments avoiding gluon approximations. completes gluon bremsstrahlung gluon simplifying assumptions thick involving gluon pages minor typo fixes minor referencing updates | non_dup | [] |
42742183 | 10.1007/JHEP10(2016)125 | We introduce a new kind of jet function: the semi-inclusive jet function
$J_i(z, \omega_J, \mu)$, which describes how a parton $i$ is transformed into a
jet with a jet radius $R$ and energy fraction $z = \omega_J/\omega$, with
$\omega_J$ and $\omega$ being the large light-cone momentum component of the
jet and the corresponding parton $i$ that initiates the jet, respectively.
Within the framework of Soft Collinear Effective Theory (SCET) we calculate
both $J_q(z, \omega_J, \mu)$ and $J_g(z, \omega_J, \mu)$ to the next-to-leading
order (NLO) for cone and anti-k$_{\rm T}$ algorithms. We demonstrate that the
renormalization group (RG) equations for $J_i(z, \omega_J, \mu)$ follow exactly
the usual DGLAP evolution, which can be used to perform the $\ln R$ resummation
for {\it inclusive} jet cross sections with a small jet radius $R$. We clarify
the difference between our RG equations for $J_i(z, \omega_J, \mu)$ and those
for the so-called unmeasured jet functions $J_i(\omega_J, \mu)$, widely used in
SCET for {\it exclusive} jet production. Finally, we present applications of
the new semi-inclusive jet functions to inclusive jet production in $e^+e^-$
and $pp$ collisions. We demonstrate that single inclusive jet production in
these collisions shares the same short-distance hard functions as single
inclusive hadron production, with only the fragmentation functions $D_i^h(z,
\mu)$ replaced by $J_i(z, \omega_J, \mu)$. This can facilitate more efficient
higher-order analytical computations of jet cross sections. We further match
our $\ln R$ resummation at both LL$_{R}$ and NLL$_{R}$ to fixed NLO results and
present the phenomenological implications for single inclusive jet production
at the LHC.Comment: 35 pages, 11 figures, published version at JHE | The semi-inclusive jet function in SCET and small radius resummation for
inclusive jet production | the semi-inclusive jet function in scet and small radius resummation for inclusive jet production | kind inclusive omega describes parton transformed omega omega omega omega cone parton initiates respectively. collinear scet omega omega cone algorithms. renormalization omega usual dglap resummation inclusive clarify omega unmeasured omega widely scet exclusive production. inclusive inclusive collisions. inclusive collisions shares inclusive hadron fragmentation replaced omega facilitate computations sections. match resummation phenomenological inclusive pages | non_dup | [] |
42668086 | 10.1007/JHEP10(2016)126 | We propose new five-dimensional gauge theory descriptions of six-dimensional
$\mathcal{N}=(1,0)$ superconformal field theories arising from type IIA brane
configurations including an $ON^0$-plane. The new five-dimensional gauge
theories may have $SO$, $Sp$, and $SU$ gauge groups and further broaden the
landscape of ultraviolet complete five-dimensional $\mathcal{N}=1$
supersymmetric gauge theories. When we include an $O8^-$-plane in addition to
an $ON^0$-plane, T-duality yields two $O7^-$-planes at the intersections of an
$ON^0$-plane and two $O5^0$-planes. We propose a novel resolution of the
$O7^-$-plane with four D7-branes in such a configuration, which enables us to
obtain three different types of five-dimensional gauge theories, depending on
whether we resolve either none or one or two $O7^-$-planes. Such different
possibilities yield a new five-dimensional duality between a D-type $SU$ quiver
and an $SO-Sp$ quiver theories. We also claim that a twisted circle
compactification of a six-dimensional superconformal field theory may lead to a
five-dimensional gauge theory different from those obtained by a simple circle
compactification.Comment: 41 pages, published versio | More on 5d descriptions of 6d SCFTs | more on 5d descriptions of 6d scfts | propose descriptions mathcal superconformal arising brane configurations plane. broaden landscape ultraviolet mathcal supersymmetric theories. duality planes intersections planes. propose branes enables resolve none planes. possibilities duality quiver quiver theories. claim twisted circle compactification superconformal circle pages versio | non_dup | [] |
42742828 | 10.1007/JHEP10(2016)128 | We propose a simple method for the computation of the flat coordinates and
Saito primitive forms on Frobenius manifolds of the deformations of Jacobi
rings associated with isolated singularities. The method is based on using a
conjecture about integral representations for the flat coordinates and on the
Saito cohomology theory. This reduces the computation to a simple linear
problem. We consider the case of the deformed Gepner chiral rings. The
knowledge of the flat structures of Frobenius manifolds can be used for exact
solution of the models of the topological conformal field theories
corresponding to these chiral rings.Comment: 17 page | Flat structures on the deformations of Gepner chiral rings | flat structures on the deformations of gepner chiral rings | propose saito primitive frobenius manifolds deformations jacobi rings singularities. conjecture representations saito cohomology theory. reduces problem. deformed gepner chiral rings. frobenius manifolds topological conformal chiral | non_dup | [] |
73356077 | 10.1007/JHEP10(2016)130 | We introduce a new set of symmetries obeyed by tree-level gauge-theory
amplitudes involving at least one gluon. The symmetry acts as a
momentum-dependent shift on the color factors of the amplitude. Using the
radiation vertex expansion, we prove the invariance under this color-factor
shift of the $n$-gluon amplitude, as well as amplitudes involving massless or
massive particles in an arbitrary representation of the gauge group with spin
zero, one-half, or one. The Bern-Carrasco-Johansson relations are a direct
consequence of this symmetry.
We also introduce the cubic vertex expansion of an amplitude, and use it to
derive a generalized-gauge-invariant constraint on the kinematic numerators of
the amplitude. We show that the amplitudes of the bi-adjoint scalar theory are
invariant under the color-factor symmetry, and use this to derive the null
eigenvectors of the propagator matrix.
We generalize the color-factor shift to loop level, and prove the invariance
under this shift of one-loop $n$-gluon amplitudes in any theory that admits a
color-kinematic-dual representation of numerators. We show that the one-loop
color-factor symmetry implies known relations among the integrands of one-loop
color-ordered amplitudes.Comment: 52 pages, 7 figures; v2: various clarifications, added figures and
references, published versio | BCJ relations from a new symmetry of gauge-theory amplitudes | bcj relations from a new symmetry of gauge-theory amplitudes | symmetries obeyed amplitudes involving gluon. acts amplitude. invariance gluon amplitudes involving massless massive one. bern carrasco johansson symmetry. cubic derive kinematic numerators amplitude. amplitudes adjoint derive eigenvectors propagator matrix. generalize invariance gluon amplitudes admits kinematic numerators. integrands ordered pages clarifications versio | non_dup | [] |
42693644 | 10.1007/JHEP10(2016)132 | We find new exact relations between the partition function and vacuum
expectation values (VEVs) of 1/2 BPS Wilson loops in ABJ theory, which allow us
to predict the large N expansions of the 1/2 BPS Wilson loops from known
results of the partition function. These relations are interpreted as an
open-closed duality where the closed string background is shifted by the
insertion of Wilson loops due to a back-reaction. Using the connection between
ABJ theory and the topological string on local P1 x P1, we explicitly write
down non-trivial relations between open and closed string amplitudes.Comment: 34 page | Exact results for ABJ Wilson loops and open-closed duality | exact results for abj wilson loops and open-closed duality | partition expectation vevs wilson loops predict expansions wilson loops partition function. interpreted duality shifted insertion wilson loops reaction. connection topological explicitly trivial | non_dup | [] |
73364919 | 10.1007/JHEP10(2016)134 | We study deviations between MSSM and $Z_3$-invariant NMSSM, with respect to
their predictions in $\Delta F=2 $ processes. We find that potentially
significant effects arise either from the well known double-penguin diagrams,
due to the extra scalar NMSSM states, or from neutralino-gluino box
contributions, due to the extended neutralino sector. Both are discussed to be
effective in the large $\tan\beta$ regime. Enhanced genuine-NMSSM contributions
in double penguins are expected for a light singlet spectrum (CP-even,CP-odd),
while the magnitude of box effects is primarily controlled through singlino
mixing. The latter is found to be typically subleading (but non-negligible) for
$\lambda \lesssim 0.5$, however it can become dominant for $\lambda\sim
\mathcal{O}(1)$. We also study the low $\tan\beta$ regime, where a distinction
between MSSM and NMSSM can come instead due to experimental constraints, acting
differently on the allowed parameter space of each model. To this end, we
incorporate the LHC Run-I limits from $H\rightarrow Z Z$, $A \rightarrow hZ$
and $H^\pm \rightarrow \tau \nu $ non-observation along with Higgs observables
and set (different) upper bounds for new physics contributions in $\Delta F=2 $
processes. We find that a $\sim 25\%$ contribution in $\Delta M_{s(d)}$ is
still possible for MFV models, however such a large effect is nowadays severely
constrained for the case of MSSM, due to stronger bounds on the charged Higgs
masses.Comment: 30 pp. text, 13 pp. appendix. Phrase "Recent limits" replaced by the
more appropriate "LHC Run-I limits" due to new data becoming available from
ATLAS, CMS. Note added with a brief discussion on these preliminary results.
Refs adde | Distinguishing between MSSM and NMSSM through $\Delta F=2$ processes | distinguishing between mssm and nmssm through $\delta f=2$ processes | deviations mssm nmssm delta processes. potentially arise penguin diagrams extra nmssm neutralino gluino neutralino sector. beta regime. genuine nmssm penguins singlet primarily singlino mixing. subleading negligible lambda lesssim lambda mathcal beta distinction mssm nmssm come acting differently model. incorporate rightarrow rightarrow rightarrow observables bounds delta processes. delta nowadays severely constrained mssm stronger bounds appendix. phrase replaced becoming atlas cms. brief preliminary results. refs adde | non_dup | [] |
73365779 | 10.1007/JHEP10(2016)136 | Given the fact that the relatively light Higgsino mass $\mu$ favored in
natural supersymmetry usually results in a sizable scattering cross section
between the neutralino dark matter and the nucleon, we study the impact of the
recently updated direct detection bounds from LUX experiment, including both
Spin Independent (SI) and Spin Dependent (SD) measurements, on the parameter
space of natural Next-to-Minimal Supersymmetric Standard Model (nNMSSM).
Different from the common impression that the SI bound is stronger than the SD
one, we find that the SD bound is complementary to the SI bound and in some
cases much more powerful than the latter in limiting the nNMSSM scenarios.
After considering the LUX results, nNMSSM is severely limited, e.g. for the
peculiar scenarios of the NMSSM where the next-to-lightest CP-even Higgs
corresponds to the $125 {\rm GeV}$ Higgs boson discovered at the LHC, the
samples obtained in our random scan are excluded by more than $85\%$. By
contrast, the monojet search at the LHC Run-I can not exclude any sample of
nNMSSM. We also investigate the current status of nNMSSM and conclude that,
although the parameter points with low fine tuning are still attainable, they
are distributed in some isolated parameter islands which are difficult to get.
Future dark matter direct search experiments such as XENON-1T will provide a
better test of nNMSSM.Comment: 20 pages, 10 figures, meet JHEP published versio | Strong constraints of LUX-2016 results on the natural NMSSM | strong constraints of lux-2016 results on the natural nmssm | higgsino favored supersymmetry sizable neutralino nucleon updated bounds supersymmetric nnmssm impression stronger complementary powerful limiting nnmssm scenarios. nnmssm severely e.g. peculiar scenarios nmssm lightest boson discovered scan excluded monojet exclude nnmssm. nnmssm fine tuning attainable islands get. xenon pages meet jhep versio | non_dup | [] |
29517614 | 10.1007/JHEP10(2016)137 | Scattering amplitudes of any four-dimensional theory with nonabelian gauge
group $\mathcal G$ may be recast as two-dimensional correlation functions on
the asymptotic two-sphere at null infinity. The soft gluon theorem is shown,
for massless theories at the semiclassical level, to be the Ward identity of a
holomorphic two-dimensional $\mathcal G$-Kac-Moody symmetry acting on these
correlation functions. Holomorphic Kac-Moody current insertions are positive
helicity soft gluon insertions. The Kac-Moody transformations are a $CPT$
invariant subgroup of gauge transformations which act nontrivially at null
infinity and comprise the four-dimensional asymptotic symmetry group.Comment: 18 pages; v2: Corrected typos; v3: Added references and a footnot | 2D Kac-Moody Symmetry of 4D Yang-Mills Theory | 2d kac-moody symmetry of 4d yang-mills theory | amplitudes nonabelian mathcal recast asymptotic sphere infinity. gluon massless semiclassical ward holomorphic mathcal moody acting functions. holomorphic moody insertions helicity gluon insertions. moody transformations subgroup transformations nontrivially infinity comprise asymptotic pages corrected typos footnot | non_dup | [] |
42753653 | 10.1007/JHEP10(2016)138 | We study the effects of non-standard interactions (NSI) and the genuine CP
phase $\delta_D$ in neutrino oscillations at low, $E_\nu \lesssim
1\,\mbox{GeV}$, and very low, $E_\nu \lesssim 0.1\,\mbox{GeV}$, energies. For
experimental setup with baseline and neutrino energy tuned to the first 1-3
oscillation maximum, we develop a simple analytic formalism to show the effects
of NSI. The vacuum mimicking and its violation as well as the use of the
separation basis play a central role in our formalism. The NSI corrections that
affect the CP phase measurement mainly come from the violation of vacuum
mimicking as well as from the corrections to the 1-3 mixing angle and
mass-squared difference. We find that the total NSI correction to the $\nu_\mu
- \nu_e$ probability $P_{\mu e}$ can reach $20\% - 30\%$ ($1 \sigma$) at
T2(H)K. Correspondingly, the correction to the CP phase can be as large as
$50^\circ$ and hence significantly deteriorates the CP sensitivity at T2(H)K.
The proposed TNT2K experiment, a combination of T2(H)K and the short baseline
experiment $\mu$Kam that uses the Super-K/Hyper-K detector at Kamioka to
measure the oscillation of the antineutrinos from muon decay at rest
($\mu$DAR), can substantially reduce the degeneracy between NSI and the genuine
CP phase $\delta_D$ to provide high CP sensitivity. The NSI correction to
$P_{\mu e}$ is only $2\%$ ($1 \sigma$) for $\mu$DAR neutrinos.Comment: The signs of the CP phases in analytic expressions are changed while
the conclusions are unchange | Non-standard interactions and the CP phase measurements in neutrino
oscillations at low energies | non-standard interactions and the cp phase measurements in neutrino oscillations at low energies | genuine delta oscillations lesssim mbox lesssim mbox energies. setup tuned oscillation analytic formalism nsi. mimicking violation formalism. come violation mimicking squared difference. sigma correspondingly circ deteriorates super hyper kamioka oscillation antineutrinos muon substantially degeneracy genuine delta sensitivity. sigma signs analytic expressions changed unchange | non_dup | [] |
42749569 | 10.1007/JHEP10(2016)139 | We review the state-of-the-art of Glauber-inspired models for estimating the
distribution of the number of participating nucleons in pA and AA collisions.
We argue that there is room for improvement in these models when it comes to
the treatment of diffractive excitation processes, and present a new simple
Glauber-like model where these processes are better taken into account. We also
suggest a new way of using the number of participating, or wounded, nucleons to
extrapolate event characteristics from pp collisions, and hence get an estimate
of basic hadronic final-state properties in pA collisions, which may be used to
extract possible nuclear effects. The new method is inspired by the Fritiof
model, but based on the full, semi-hard multiparton interaction model of Pythia
8.Comment: 50 pages, 13 figure | Diffractive and non-diffractive wounded nucleons and final states in pA
collisions | diffractive and non-diffractive wounded nucleons and final states in pa collisions | glauber inspired estimating participating nucleons collisions. argue room comes diffractive glauber account. participating wounded nucleons extrapolate collisions hadronic collisions extract effects. inspired fritiof multiparton pythia pages | non_dup | [] |
42745514 | 10.1007/JHEP10(2016)140 | We study boundary renormalization group flows between boundary conformal
field theories in $1+1$ dimensions using methods of quantum information theory.
We define an entropic $g$-function for theories with impurities in terms of the
relative entanglement entropy, and we prove that this $g$-function decreases
along boundary renormalization group flows. This entropic $g$-theorem is valid
at zero temperature, and is independent from the $g$-theorem based on the
thermal partition function. We also discuss the mutual information in boundary
RG flows, and how it encodes the correlations between the impurity and bulk
degrees of freedom. Our results provide a quantum-information understanding of
(boundary) RG flow as increase of distinguishability between the UV fixed point
and the theory along the RG flow.Comment: 34 pages + appendices, 8 figures. v2. Improved and corrected version
of the proo | The g-theorem and quantum information theory | the g-theorem and quantum information theory | renormalization flows conformal theory. entropic impurities entanglement renormalization flows. entropic valid partition function. mutual flows encodes impurity freedom. distinguishability pages appendices figures. corrected proo | non_dup | [] |
42677132 | 10.1007/JHEP10(2016)141 | Causality in a shockwave state is related to the analytic properties of a
four-point correlation function. Extending recent results for scalar probes, we
show that this constrains the couplings of the stress tensor to light spinning
operators in conformal field theory, and interpret these constraints in terms
of the interaction with null energy. For spin-1 and spin-2 conserved currents
in four dimensions, the resulting inequalities are a subset of the
Hofman-Maldacena conditions for positive energy deposition. It is well known
that energy conditions in holographic theories are related to causality on the
gravity side; our results make a connection on the CFT side, and extend it to
non-holographic theories.Comment: 24+10 page | A New Spin on Causality Constraints | a new spin on causality constraints | causality shockwave analytic function. extending probes constrains couplings spinning conformal interpret energy. conserved currents inequalities hofman maldacena deposition. holographic causality connection extend holographic | non_dup | [] |
42729995 | 10.1007/JHEP10(2016)142 | We study $\mathcal{N}=2$ supergravity with higher-derivative corrections that
preserve the $\mathcal{N}=2$ supersymmetry and show that Kerr-Newman black
holes are solutions to these theories. Modifications of the black hole entropy
due to the higher derivatives are universal and apply even in the BPS and
Schwarzschild limits. Our solutions and their entropy are greatly simplified by
supersymmetry of the theory even though the black holes generally do not
preserve any of the supersymmetry.Comment: 27 pages, 4 table | Kerr-Newman Black Holes with String Corrections | kerr-newman black holes with string corrections | mathcal supergravity preserve mathcal supersymmetry kerr newman holes theories. modifications derivatives universal schwarzschild limits. greatly simplified supersymmetry holes preserve pages | non_dup | [] |
73353870 | 10.1007/JHEP10(2016)143 | Recently, it has been proposed that the butterfly velocity - a speed at which
quantum information propagates - may provide a fundamental bound on diffusion
constants in dirty incoherent metals. We analytically compute the charge
diffusion constant and the butterfly velocity in charge-neutral holographic
matter with long wavelength "hydrodynamic" disorder in a single spatial
direction. In this limit, we find that the butterfly velocity does not set a
sharp lower bound for the charge diffusion constant.Comment: 16+7 pages; 1 figure. v2: published versio | Charge diffusion and the butterfly effect in striped holographic matter | charge diffusion and the butterfly effect in striped holographic matter | butterfly propagates dirty incoherent metals. analytically butterfly neutral holographic hydrodynamic disorder direction. butterfly sharp pages figure. versio | non_dup | [] |
73356659 | 10.1007/JHEP10(2016)146 | We study asymptotic charges for symmetric massless higher-spin fields on Anti
de Sitter backgrounds of arbitrary dimension within the canonical formalism. We
first analyse in detail the spin-3 example: we cast Fronsdal's action in
Hamiltonian form, we derive the charges and we propose boundary conditions on
the canonical variables that secure their finiteness. We then extend the
computation of charges and the characterisation of boundary conditions to
arbitrary spin.Comment: 44 pages. References and comments added; version to appear in JHE | Higher-spin charges in Hamiltonian form. I. Bose fields | higher-spin charges in hamiltonian form. i. bose fields | asymptotic charges massless sitter backgrounds canonical formalism. analyse cast fronsdal derive charges propose canonical secure finiteness. extend charges characterisation pages. comments | non_dup | [] |
42752794 | 10.1007/JHEP10(2016)147 | We present a detailed discussion on neutrinoless double beta decay within a
class of left-right symmetric models where neutrino mass originates by natural
type-II seesaw dominance. The spontaneous symmetry breaking is implemented with
doublets, triplets and bidoublet scalars. The fermion sector is extended with
an extra sterile neutrino per generation that helps in implementing the seesaw
mechanism. The presence of extra particles in the model exactly cancels type-I
seesaw and allows large value for Dirac neutrino mass matrix $M_D$. The key
feature of this work is that all the physical masses and mixing are expressed
in terms of neutrino oscillation parameters and lightest neutrino mass thereby
facilitating to constrain light neutrino masses from $0\nu\beta\beta$ decay.
With this large value of $M_D$ new contributions arise due to; i) purely
left-handed current via exchange of heavy right-handed neutrinos as well as
sterile neutrinos, ii) the so called $\lambda$ and $\eta$ diagrams. New physics
contributions also arise from right-handed currents with right-handed gauge
boson $W_R$ mass around $3$~TeV. From the numerical study, we find that the new
contributions to $0\nu\beta\beta$ decay not only saturate the current
experimental bound but also give lower limit on absolute scale of lightest
neutrino mass and favor NH pattern of light neutrino mass hierarchy.Comment: 40 pages, Discussion added on NMEs uncertainty, Version accepted in
JHE | Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw
Dominance | neutrinoless double beta decay in lrsm with natural type-ii seesaw dominance | neutrinoless beta originates seesaw dominance. spontaneous breaking implemented doublets triplets bidoublet scalars. fermion extra sterile helps implementing seesaw mechanism. extra cancels seesaw dirac oscillation lightest thereby facilitating constrain beta beta decay. arise purely handed handed neutrinos sterile neutrinos lambda diagrams. arise handed currents handed boson tev. beta beta saturate lightest favor pages nmes | non_dup | [] |
42659816 | 10.1007/JHEP10(2016)149 | The scattering equations, originally introduced by Fairlie and Roberts in
1972 and more recently shown by Cachazo, He and Yuan to provide a kinematic
basis for describing tree amplitudes for massless particles in arbitrary
space-time dimension, have been reformulated in polynomial form. The scattering
equations for N particles are equivalent to N-3 polynomial equations h_m=0,
m=1,...,N-3, in N-3 variables, where h_m has degree m and is linear in the
individual variables. Facilitated by this linearity, elimination theory is used
to construct a single variable polynomial equation of degree (N-3)! determining
the solutions. \Delta_N is the sparse resultant of the system of polynomial
scattering equations and it can be identified as the hyperdeterminant of a
multidimensional matrix of border format within the terminology of Gel'fand,
Kapranov and Zelevinsky. Macaulay's Unmixedness Theorem is used to show that
the polynomials of the scattering equations constitute a regular sequence,
enabling the Hilbert series of the variety determined by the scattering
equations to be calculated, independently showing that they have (N-3)!
solutions.Comment: v2 completes the proof that the construction yields \Delta_N for all
N, identifies it as the hyperdeterminant of a multidimensional matrix, and
proves that the polynomial scattering equations constitute a regular
sequence, enabling the Hilbert series of the associated variety to be
calculated, 26 page | General Solution of the Scattering Equations | general solution of the scattering equations | originally fairlie roberts cachazo yuan kinematic describing amplitudes massless reformulated form. variables. facilitated linearity elimination determining solutions. delta sparse resultant hyperdeterminant multidimensional border format terminology fand kapranov zelevinsky. macaulay unmixedness polynomials constitute enabling hilbert independently completes delta identifies hyperdeterminant multidimensional proves constitute enabling hilbert | non_dup | [] |
42742638 | 10.1007/JHEP10(2016)150 | We study supersymmetry enhancement from ${\cal N}=3$ to ${\cal N}=4$ proposed
by Aharony and Tachikawa by using string junctions in S-folds. The central
charges carried by junctions play a central role in our analysis. We consider
planer junctions in a specific plane. Before the S-folding they carry two
complex central charges, which we denote by $Z$ and $\bar Z$. The S-fold
projection eliminates $\bar Z$ as well as one of the four supercharges, and
when the supersymmetry is enhanced $\bar Z$ should be reproduced by some
non-perturbative mechanism. For the models of $\mathbb{Z}_3$ and $\mathbb{Z}_4$
S-folds which are expected to give $SU(3)$ and $SO(5)$ ${\cal N}=4$ theories we
compare the junction spectra with those in perturbative brane realization of
the same theories. We establish one-to-one correspondence so that $Z$
coincides. By using the correspondence we also give an expression for the
enhanced central charge $\bar Z$.Comment: 30 pages, 7 figures, v2: minor corrections, version accepted for
publication in JHE | Supersymmetry Enhancement and Junctions in S-folds | supersymmetry enhancement and junctions in s-folds | supersymmetry enhancement aharony tachikawa junctions folds. charges junctions analysis. planer junctions plane. folding carry charges projection eliminates supercharges supersymmetry reproduced perturbative mechanism. mathbb mathbb folds junction perturbative brane realization theories. establish correspondence coincides. correspondence .comment pages minor publication | non_dup | [] |
73376000 | 10.1007/JHEP10(2016)151 | The purpose of this contribution is to initiate the study of integrable
deformations for different superstring theory formalisms that manifest the
property of (classical) integrability. In this paper we choose the hybrid
formalism of the superstring in the background AdS_{2}xS^{2} and explore in
detail the most immediate consequences of its lambda-deformation. The resulting
action functional corresponds to the lambda-model of the matter part of the
fairly more sophisticated pure spinor formalism, which is also known to be
classical integrable. In particular, the deformation preserves the
integrability and the one-loop conformal invariance of its parent theory, hence
being a marginal deformation.Comment: LaTex, 37 pages, references added, match published version in Journal
of High Energy Physics, 201 | Exploring The Lambda Model Of The Hybrid Superstring | exploring the lambda model of the hybrid superstring | initiate integrable deformations superstring formalisms manifest integrability. hybrid formalism superstring explore immediate consequences lambda deformation. lambda fairly sophisticated spinor formalism integrable. deformation preserves integrability conformal invariance parent marginal latex pages match | non_dup | [] |
73348022 | 10.1007/JHEP10(2016)152 | Holographic model of a three-dimensional current carrying superconductor or
superfluid with {\it dark matter} sector described by the additional
$U(1)$-gauge field coupled to the ordinary Maxwell one, has been studied in the
probe limit. We investigated analytically by the Sturm-Liouville variational
method, the holographic s-wave and p-wave models in the background of the AdS
soliton as well as five-dimensional AdS black hole spacetimes. The two models
of p-wave superfluids were considered, the so called $SU(2)$ and the
Maxwell-vector. Special attention has been paid to the dependence of the
critical chemical potential and critical transition temperature on the velocity
of the condensate and {\it dark matter} parameters. The current $J$ in
holographic three-dimensional superconductor studied here, shows the linear
dependence on $T_c-T$ for both s and p-wave symmetry. This is in a significant
contrast with the previously obtained results for two-dimensional
superconductors, which reveal the $(T-T_c)^{3/2}$ temperature dependence. The
coupling constant $\alpha$, as well as, chemical potential $\mu_D$ and the
velocity $S_D$ of the {\it dark matter}, affect the critical chemical potential
of the p-wave holographic $SU(2)$ system. On the other hand, $\alpha$, {\it
dark matter} velocity $S_D$ and density $\rho_D$ determine the actual value of
the transition temperature of the same superconductor/superfluid set up.
However, the {\it dark matter} does not affect the value of the current.Comment: Completely rewritten version. Added new references and the discussion
of experimental relevance. 36 pages. JHEP style - file include | Condensate flow in holographic models in the presence of dark matter | condensate flow in holographic models in the presence of dark matter | holographic carrying superconductor superfluid ordinary maxwell limit. analytically sturm liouville variational holographic soliton spacetimes. superfluids maxwell vector. paid condensate parameters. holographic superconductor symmetry. superconductors reveal dependence. alpha holographic system. alpha superconductor superfluid rewritten version. relevance. pages. jhep style file | non_dup | [] |
73353738 | 10.1007/JHEP10(2016)153 | In view of the large discrepancy about the associated production of a prompt
$J/\psi$ and a $Z$ boson between the ATLAS data at $\sqrt{s}=8$ TeV and
theoretical predictions for Single Parton Scattering (SPS) contributions, we
perform an evaluation of the corresponding cross section at one loop accuracy
(Next-to-Leading Order, NLO) in a quark-hadron-duality approach, also known as
the Colour-Evaporation Model (CEM). This work is motivated by (i) the extremely
disparate predictions based on the existing NRQCD fits conjugated with the
absence of a full NLO NRQCD computation and (ii) the fact that we believe that
such an evaluation provides a likely upper limit of the SPS cross section. In
addition to these theory improvements, we argue that the ATLAS estimation of
the Double Parton Scattering (DPS) yield may be underestimated by a factor as
large as 3 which then reduces the size of the SPS yield extracted from the
ATLAS data. Our NLO SPS evaluation also allows us to set an upper limit on
$\sigma_{\rm eff}$ driving the size of the DPS yield. Overall, the discrepancy
between theory and experiment may be smaller than expected, which calls for
further analyses by ATLAS and CMS, for which we provide predictions, and for
full NLO computations in other models. As an interesting side product of our
analysis, we have performed the first NLO computation of $d\sigma / dP_T$ for
prompt single-$J/\psi$ production in the CEM from which we have fit the CEM
non-pertubative parameter at NLO using the most recent ATLAS data.Comment: 22 pages, 9 figures, 3 tables. LaTeX uses jheppub.st | Associated production of a quarkonium and a Z boson at one loop in a
quark-hadron-duality approach | associated production of a quarkonium and a z boson at one loop in a quark-hadron-duality approach | discrepancy prompt boson atlas sqrt parton hadron duality colour evaporation motivated extremely disparate nrqcd fits conjugated nrqcd believe section. improvements argue atlas parton underestimated reduces atlas data. sigma driving yield. discrepancy calls atlas computations models. sigma prompt pertubative atlas pages tables. latex jheppub.st | non_dup | [] |
42738433 | 10.1007/JHEP10(2016)158 | We study the velocity statistics distribution of an external heavy particle
in holographic fluids. We argue that when the dual supergravity background has
a finite temperature horizon the velocity statistics goes generically as $1/v$,
compatible with the jet-quenching intuition from the quark-gluon plasma. A
careful analysis of the behavior of the classical string whose apparent
worldsheet horizon deviates from the background horizon reveals that other
regimes are possible. We numerically discuss two cases: the magnetized
quark-gluon plasma and a model of superfluid flow. We explore a range of
parameters in these top-down supergravity solutions including, respectively,
the magnetic field and the superfluid velocity. We determine that the velocity
statistics goes largely as $1/v$, however, as we leave the non-relativistic
regime we observe some deviations.Comment: 32 pages, 12 figures, references added and minor correction | Velocity Statistics in Holographic Fluids: Magnetized Quark-Gluon Plasma
and Superfluid Flow | velocity statistics in holographic fluids: magnetized quark-gluon plasma and superfluid flow | holographic fluids. argue supergravity horizon goes generically compatible quenching intuition gluon plasma. careful apparent worldsheet horizon deviates horizon reveals regimes possible. numerically magnetized gluon superfluid flow. explore supergravity superfluid velocity. goes largely leave relativistic pages minor | non_dup | [] |
73380153 | 10.1007/JHEP10(2016)160 | Starting from a recently proposed linear formulation in terms of auxiliary
fields, we study $n$-field generalizations of Born and Born-Infeld theories. In
this description the Lagrangian is quadratic in the vector field strengths and
the symmetry properties (including the characteristic self-duality) of the
corresponding non-linear theory are manifest as on-shell duality symmetries and
depend on the choice of the (homogeneous) manifold spanned by the auxiliary
scalar fields and the symplectic frame. By suitably choosing these defining
properties of the quadratic Lagrangian, we are able to reproduce some known
multi-field Born-Infeld theories and to derive new non-linear models, such as
the $n$-field Born theory. We also discuss non-Abelian generalizations of these
theories obtained by choosing the vector fields in the adjoint representation
of an off-shell compact global symmetry group $K$ and replacing them by
non-Abelian, $K$-covariant field strengths, thus promoting $K$ to a gauge
group.Comment: 22 pages, LaTeX source, minor corrections and references adde | On Multifield Born and Born-Infeld Theories and their non-Abelian
Generalizations | on multifield born and born-infeld theories and their non-abelian generalizations | formulation auxiliary generalizations born born infeld theories. lagrangian quadratic strengths duality manifest duality symmetries homogeneous manifold spanned auxiliary symplectic frame. suitably choosing defining quadratic lagrangian reproduce born infeld derive born theory. abelian generalizations choosing adjoint replacing abelian covariant strengths promoting pages latex minor adde | non_dup | [] |
73352404 | 10.1007/JHEP10(2016)161 | When analyzing the perception of Hawking radiation by different observers,
the Hawking effect becomes mixed with the Unruh effect. The separation of both
effects is not always clear in the literature. Here we propose an
inconsistency-free interpretation of what constitutes a Hawking effect and what
an Unruh effect. An appropriate interpretation is important in order to
elucidate what sort of effects a detector might experience depending on its
trajectory and the state of the quantum field. Under simplifying assumptions we
introduce an analytic formula that separates these two effects. Armed with the
previous interpretation we argue that for a free-falling detector to cross the
horizon without experiencing high-energy effects, it is necessary that the
horizon crossing is not attempted at low velocities.Comment: Minor corrections to match the published version. 14 pages, 2 figure | Hawking versus Unruh effects, or the difficulty of slowly crossing a
black hole horizon | hawking versus unruh effects, or the difficulty of slowly crossing a black hole horizon | analyzing perception hawking observers hawking unruh effect. literature. propose inconsistency constitutes hawking unruh effect. elucidate sort trajectory field. simplifying assumptions analytic separates effects. armed argue falling horizon experiencing horizon crossing attempted minor match version. pages | non_dup | [] |
73350475 | 10.1007/JHEP10(2016)162 | We extend the four-dimensional unsubtraction method, which is based on the
loop-tree duality (LTD), to deal with processes involving heavy particles. The
method allows to perform the summation over degenerate IR configurations
directly at integrand level in such a way that NLO corrections can be
implemented directly in four space-time dimensions. We define a general
momentum mapping between the real and virtual kinematics that accounts properly
for the quasi-collinear configurations, and leads to an smooth massless limit.
We illustrate the method first with an scalar toy example, and then analyse the
case of the decay of a scalar or vector boson into a pair of massive quarks.
The results presented in this paper are suitable for the application of the
method to any multipartonic process.Comment: 31 pages, 9 figure | Four-dimensional unsubtraction with massive particles | four-dimensional unsubtraction with massive particles | extend unsubtraction duality deal involving particles. summation degenerate configurations integrand implemented dimensions. virtual kinematics accounts properly quasi collinear configurations massless limit. illustrate analyse boson massive quarks. multipartonic pages | non_dup | [] |
83864161 | 10.1007/JHEP10(2017)001 | We study some analytic properties of the BFKL ladder at next-to-leading
logarithmic accuracy (NLLA). We use a procedure by Chirilli and Kovchegov to
construct the NLO eigenfunctions, and we show that the BFKL ladder can be
evaluated order by order in the coupling in terms of certain generalised
single-valued multiple polylogarithms recently introduced by Schnetz. We
develop techniques to evaluate the BFKL ladder at any loop order, and we
present explicit results up to five loops. Using the freedom in defining the
matter content of the NLO BFKL eigenvalue, we obtain conditions for the BFKL
ladder in momentum space at NLLA to have maximal transcendental weight. We
observe that, unlike in moment space, the result in momentum space in N = 4 SYM
is not identical to the maximal weight part of QCD, and moreover that there is
no gauge theory with this property. We classify the theories for which the BFKL
ladder at NLLA has maximal weight in terms of their field content, and we find
that these theories are highly constrained: there are precisely four classes of
theories with this property involving only fundamental and adjoint matter, all
of which have a vanishing one-loop beta function and a matter content that fits
into supersymmetric multiplets. Our findings indicate that theories which have
maximal weight are highly constrained and point to the possibility that there
is a connection between maximal transcendental weight and superconformal
symmetry.Comment: 45 pages, 1 figure, 1 table. v2: published versio | The analytic structure and the transcendental weight of the BFKL ladder
at NLL accuracy | the analytic structure and the transcendental weight of the bfkl ladder at nll accuracy | analytic bfkl ladder logarithmic nlla chirilli kovchegov eigenfunctions bfkl ladder generalised valued polylogarithms schnetz. bfkl ladder loops. freedom defining bfkl eigenvalue bfkl ladder nlla maximal transcendental weight. unlike moment maximal property. classify bfkl ladder nlla maximal constrained precisely involving adjoint vanishing beta fits supersymmetric multiplets. maximal constrained connection maximal transcendental superconformal pages table. versio | non_dup | [] |
83870348 | 10.1007/JHEP10(2017)002 | The clockwork mechanism is a novel method for generating a large separation
between the dynamical scale and interaction scale of a theory. We demonstrate
how the mechanism can arise from a sequence of strongly-coupled sectors. This
framework avoids elementary scalar fields as well as ad hoc continuous global
symmetries, both of which are subject to serious stability issues. The
clockwork factor, $q$, is determined by the consistency of the strong dynamics.
The preserved global $U(1)$ of the clockwork appears as an accidental symmetry,
resulting from discrete or $U(1)$ gauge symmetries, and it is spontaneously
broken by the chiral condensates. We apply such a dynamical clockwork to
construct models with an effectively invisible QCD axion from TeV-scale strong
dynamics. The axion couplings are determined by the localisation of the
Standard Model interactions along the clockwork sequence. The TeV spectrum
includes either coloured hadrons or vector-like quarks. Dark matter can be
accounted for by the axion or the lightest neutral baryons, which are
accidentally stable.Comment: 41 page | Dynamical Clockwork Axions | dynamical clockwork axions | clockwork generating theory. arise sectors. avoids elementary symmetries serious issues. clockwork consistency dynamics. preserved clockwork accidental symmetries spontaneously broken chiral condensates. clockwork effectively invisible axion dynamics. axion couplings localisation clockwork sequence. coloured hadrons quarks. accounted axion lightest neutral baryons accidentally | non_dup | [] |
86414402 | 10.1007/JHEP10(2017)004 | Massless particles in $n+1$ dimensions lead to massive particles in $n$
dimensions on Kaluza-Klein reduction. In string theory, wrapped branes lead to
multiplets of massive particles in $n$ dimensions, in representations of a
duality group $G$. By encoding the masses of these particles in auxiliary
worldline scalars, also transforming under $G$, we write an action which
resembles that for a massless particle on an extended spacetime. We associate
this extended spacetime with that appearing in double field theory and
exceptional field theory, and formulate a version of the action which is
invariant under the generalised diffeomorphism symmetry of these theories. This
provides a higher-dimensional perspective on the origin of mass and tension in
string theory and M-theory. Finally, we consider the reduction of exceptional
field theory on a twisted torus, which is known to give the massive IIA theory
of Romans. In this case, our particle action leads naturally to the action for
a D0 brane in massive IIA. Here an extra vector field is present on the
worldline, whose origin in exceptional field theory is a vector field
introduced to ensure invariance under generalised diffeomorphisms.Comment: 36 pages plus appendices, v2: typos, minor clarifications etc, v3:
ditt | Particle actions and brane tensions from double and exceptional geometry | particle actions and brane tensions from double and exceptional geometry | massless massive kaluza klein reduction. wrapped branes multiplets massive representations duality encoding auxiliary worldline scalars transforming resembles massless spacetime. associate spacetime appearing exceptional formulate generalised diffeomorphism theories. perspective tension theory. exceptional twisted torus massive romans. naturally brane massive iia. extra worldline exceptional ensure invariance generalised pages appendices typos minor clarifications ditt | non_dup | [] |
83837489 | 10.1007/JHEP10(2017)008 | The SYK model is a quantum mechanical model that has been proposed to be
holographically dual to a $1+1$-dimensional model of a quantum black hole. An
emergent "gravitational" mode of this model is governed by an unusual action
that that has been called the Schwarzian action. It governs a reparametrization
of a circle. We show that the path integral of the Schwarzian theory is
one-loop exact. The argument uses a method of fermionic localization, even
though the model itself is purely bosonic.Comment: 19+9 page | Fermionic Localization of the Schwarzian Theory | fermionic localization of the schwarzian theory | holographically hole. emergent gravitational governed unusual schwarzian action. governs reparametrization circle. schwarzian exact. argument fermionic localization purely | non_dup | [] |
83842973 | 10.1007/JHEP10(2017)009 | We construct four-center bubbled BPS solutions with a Gibbons-Hawking base
space. We give a systematic procedure to build scaling solutions: starting from
three-supertube configurations and using generalized spectral flows and gauge
transformations to extend to solutions with four Gibbons-Hawking centers. This
allows us to construct very large families of smooth horizonless solutions that
have the same charges and angular momentum as supersymmetric black holes with a
macroscopically large horizon area. Our construction reveals that all scaling
solutions with four Gibbons Hawking centers have an angular momentum at around
99% of the cosmic censorship bound. We give both an analytical and a numerical
explanation for this unexpected feature.Comment: 23 pages, 16 figures; v2: minor correction | Four-center bubbled BPS solutions with a Gibbons-Hawking base | four-center bubbled bps solutions with a gibbons-hawking base | bubbled gibbons hawking space. build supertube configurations flows transformations extend gibbons hawking centers. families horizonless charges supersymmetric holes macroscopically horizon area. reveals gibbons hawking centers cosmic censorship bound. explanation unexpected pages minor | non_dup | [] |
83848364 | 10.1007/JHEP10(2017)010 | Memory effects in scattering processes are described in terms of the
asymptotic retarded fields. These fields are completely determined by the
scattering data and the zero mode part is set by the soft photon theorem. The
dressed asymptotic states defining an infrared finite S- matrix for charged
particles can be defined as quantum coherent states using the corpuscular
resolution of the asymptotic retarded fields. Im- posing that the net radiated
energy in the scattering is zero leads to the new set of conservation laws for
the scattering S-matrix which are equivalent to the decoupling of the soft
modes. The actual observabil- ity of the memory requires a non vanishing
radiated energy and could be described using the infrared part of the
differential cross section that only depends on the scattering data and the
radiated energy. This is the IR safe cross section with any number of emitted
pho- tons carrying total energy equal to the energy involved in the actual
memory detection | Memory and the Infrared | memory and the infrared | asymptotic retarded fields. theorem. dressed asymptotic defining infrared coherent corpuscular asymptotic retarded fields. posing radiated conservation laws decoupling modes. observabil vanishing radiated infrared radiated energy. safe emitted tons carrying | non_dup | [] |
73355334 | 10.1007/JHEP10(2017)011 | We consider the supergravity back-reaction of M2 branes wrapping around the
space-time cycles in 1/8-BPS microstate geometries. We show that such brane
wrappings will generically break all the supersymmetries. In particular, all
the supersymmetries will be broken if there are such wrapped branes but the net
charge of the wrapped branes is zero. We show that if M2 branes wrap a single
cycle, or if they wrap a several of co-linear cycles with the same orientation,
then the solution will be 1/16-BPS, having two supersymmetries. We comment on
how these results relate to using W-branes to understand the microstate
structure of 1/8-BPS black holes.Comment: 20 page | Supersymmetry and Wrapped Branes in Microstate Geometries | supersymmetry and wrapped branes in microstate geometries | supergravity branes wrapping cycles microstate geometries. brane wrappings generically break supersymmetries. supersymmetries broken wrapped branes wrapped branes zero. branes wrap wrap cycles supersymmetries. comment relate branes microstate | non_dup | [] |
73990947 | 10.1007/JHEP10(2017)012 | We propose a supersymmetric extension of the Standard Model (SM) with a
continuous global $U(1)_R$ symmetry. The $R$-charges of the SM fields are
identified with that of their lepton numbers. As a result, both bilinear and
trilinear `$R$-parity violating' (RPV) terms could be present at the
superpotential. However, $R$-symmetry is not an exact symmetry as it is broken
by supergravity effects. Hence, sneutrinos acquire a small vacuum expectation
value in this framework. However, a suitable choice of basis ensures that the
bilinear RPV terms can be completely rotated away from the superpotential and
the scalar potential. On the other hand, the trilinear terms play a very
crucial role in generating neutrino masses and mixing at the tree level. This
is noticeably different from the typical $R$-parity violating Minimal
Supersymmetric Standard Model. Also, gravitino mass turns out to be the order
parameter of $R$-breaking and is directly related to the neutrino mass. We show
that such a gravitino, within the mass range $200~\text{keV}\lesssim
m_{3/2}\lesssim 0.1~\text{GeV}$ can be an excellent dark matter candidate.
Finally, we looked into the collider implications of our framework.Comment: 23 pages, one figure (added), title changed, discussion added on
sneutrino vev basis, accepted for publication in JHE | Natural emergence of neutrino masses and dark matter from $R$-symmetry | natural emergence of neutrino masses and dark matter from $r$-symmetry | propose supersymmetric symmetry. charges lepton numbers. bilinear trilinear parity violating superpotential. broken supergravity effects. sneutrinos acquire expectation framework. ensures bilinear rotated away superpotential potential. trilinear crucial generating level. noticeably parity violating supersymmetric model. gravitino turns breaking mass. gravitino lesssim lesssim excellent candidate. looked collider pages title changed sneutrino publication | non_dup | [] |
74204354 | 10.1007/JHEP10(2017)013 | Light dark matter is a compelling experimental target in light of stringent
constraints on heavier WIMPs. However, for a sub-MeV WIMP, the universe is
sufficiently well understood at temperatures below 10 MeV that there is no room
for it to be a thermal relic. Avoiding thermalization is itself a strong
constraint with significant implications for direct detection. In this paper,
we explore the space of models of sub-MeV dark matter with viable cosmologies.
The parameter space of these models that is also consistent with astrophysical
and lab-based limits is highly restricted for couplings to electrons but
somewhat less constrained for nuclei. We find that achieving nuclear
cross-sections well-above the neutrino floor necessarily predicts a new
contribution to the effective number of neutrino species, $\Delta N_{\rm eff} =
0.09$ that will be tested by the next generation of CMB observations. On the
other hand, models with absorption signatures of dark matter are less
restricted by cosmology even with future observations.Comment: 24 pages, 5 figures; V2: figures corrected, minor changes; V3:
additional stellar cooling constraint include | The Cosmology of Sub-MeV Dark Matter | the cosmology of sub-mev dark matter | compelling stringent heavier wimps. wimp universe sufficiently understood room relic. avoiding thermalization detection. explore viable cosmologies. astrophysical restricted couplings somewhat constrained nuclei. achieving floor necessarily predicts delta observations. signatures restricted cosmology pages corrected minor cooling | non_dup | [] |
86415810 | 10.1007/JHEP10(2017)014 | We calculate the vacuum stability conditions and renormalisation group
equations for the extensions of standard model with a higher colour multiplet
scalar up to the representation $\mathbf{15'}$ that leaves the strong
interaction asymptotically free. In order to find the vacuum stability
conditions, we calculate the orbit spaces for the self-couplings of the higher
multiplets, which for the representations $\mathbf{15}$ and $\mathbf{15'}$ of
$SU(3)_c$ are highly complicated. However, if the scalar potential is linear in
orbit space variables, it is sufficient to know the convex hull of the orbit
space. In contrast to the self-couplings of other multiplets, we find that the
scalar quartic couplings of the representations $\mathbf{3}$ and $\mathbf{8}$
walk rather than run, remaining nearly constant and perturbative over a vast
energy range. We describe the conditions for walking couplings using a
schematic model. With these technical results at hand we revise earlier results
of generation of new scales with large $SU(3)_c$ scalar multiplets. Our results
are easily extendable to models of new physics with additional $SU(3)$ or
SU($N$) gauge symmetries.Comment: 26 pages, 6 figures, 2 table | Vacuum Stability and Perturbativity of SU(3) Scalars | vacuum stability and perturbativity of su(3) scalars | renormalisation extensions colour multiplet mathbf leaves asymptotically free. orbit couplings multiplets representations mathbf mathbf complicated. orbit convex hull orbit space. couplings multiplets quartic couplings representations mathbf mathbf walk nearly perturbative vast range. walking couplings schematic model. revise multiplets. extendable pages | non_dup | [] |
84090946 | 10.1007/JHEP10(2017)015 | We consider two copies of the Standard Model, interchanged by an exact parity
symmetry, P. The observed fermion mass hierarchy is described by suppression
factors $\epsilon^{n_i}$ for charged fermion $i$, as can arise in
Froggatt-Nielsen and extra-dimensional theories of flavor. The corresponding
flavor factors in the mirror sector are $\epsilon'^{n_i}$, so that spontaneous
breaking of the parity P arises from a single parameter $\epsilon'/\epsilon$,
yielding a tightly constrained version of Minimal Mirror Twin Higgs, introduced
in our previous paper. Models are studied for simple values of $n_i$, including
in particular one with SU(5)-compatibility, that describe the observed fermion
mass hierarchy. The entire mirror quark and charged lepton spectrum is broadly
predicted in terms of $\epsilon'/\epsilon$, as are the mirror QCD scale and the
decoupling temperature between the two sectors. Helium-, hydrogen- and
neutron-like mirror dark matter candidates are constrained by self-scattering
and relic ionization. In each case, the allowed parameter space can be fully
probed by proposed direct detection experiments. Correlated predictions are
made as well for the Higgs signal strength and the amount of dark radiation.Comment: 43 pages, 15 figure | Effective Theory of Flavor for Minimal Mirror Twin Higgs | effective theory of flavor for minimal mirror twin higgs | copies interchanged parity fermion hierarchy suppression epsilon fermion arise froggatt nielsen extra flavor. flavor mirror epsilon spontaneous breaking parity arises epsilon epsilon yielding tightly constrained mirror twin paper. compatibility fermion hierarchy. mirror lepton broadly epsilon epsilon mirror decoupling sectors. helium neutron mirror candidates constrained relic ionization. probed experiments. pages | non_dup | [] |
84093118 | 10.1007/JHEP10(2017)016 | We introduce a mirror copy of the ordinary fermions and Higgs scalars for
embedding the $SU(2)_L\times U(1)_Y$ electroweak gauge symmetry into an
$SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ left-right gauge symmetry. We then
show the spontaneous left-right symmetry breaking can automatically break the
parity symmetry motivated by solving the strong CP problem. Through the
$SU(2)_R$ gauge interactions, a mirror Majorana neutrino can decay into a
mirror charged lepton and two mirror quarks. Consequently we can obtain a
lepton asymmetry stored in the mirror charged leptons. The Yukawa couplings of
the mirror and ordinary charged fermions to a dark matter scalar then can
transfer the mirror lepton asymmetry to an ordinary lepton asymmetry which
provides a solution to the cosmic baryon asymmetry in association with the
$SU(2)_L$ sphaleron processes. In this scenario, the baryon asymmetry can be
well described by the neutrino mass matrix up to an overall factor.Comment: 8 pages, 1 figur | Spontaneous mirror left-right symmetry breaking for leptogenesis
parametrized by Majorana neutrino mass matrix | spontaneous mirror left-right symmetry breaking for leptogenesis parametrized by majorana neutrino mass matrix | mirror copy ordinary fermions scalars embedding electroweak symmetry. spontaneous breaking automatically break parity motivated solving problem. mirror majorana mirror lepton mirror quarks. lepton asymmetry stored mirror leptons. yukawa couplings mirror ordinary fermions mirror lepton asymmetry ordinary lepton asymmetry cosmic baryon asymmetry sphaleron processes. baryon asymmetry pages figur | non_dup | [] |
83868153 | 10.1007/JHEP10(2017)017 | In theories of Einstein gravity coupled with a dilaton and a two-form, a soft
theorem for the two-form, known as the Kalb-Ramond B-field, has so far been
missing. In this work we fill the gap, and in turn formulate a unified soft
theorem valid for gravitons, dilatons and B-fields in any tree-level scattering
amplitude involving the three massless states. The new soft theorem is fixed by
means of on-shell gauge invariance and enters at the subleading order of the
graviton's soft theorem. In contrast to the subsubleading soft behavior of
gravitons and dilatons, we show that the soft behavior of B-fields at this
order cannot be fully fixed by gauge invariance. Nevertheless, we show that it
is possible to establish a gauge invariant decomposition of the amplitudes to
any order in the soft expansion. We check explicitly the new soft theorem in
the bosonic string and in Type II superstring theories, and furthermore
demonstrate that, at the next order in the soft expansion, totally gauge
invariant terms appear in both string theories which cannot be factorized into
a soft theorem.Comment: 27 pages, 1 figur | The B-field soft theorem and its unification with the graviton and
dilaton | the b-field soft theorem and its unification with the graviton and dilaton | einstein dilaton kalb ramond missing. fill formulate unified valid gravitons dilatons involving massless states. invariance enters subleading graviton theorem. subsubleading gravitons dilatons invariance. nevertheless establish decomposition amplitudes expansion. check explicitly bosonic superstring totally factorized pages figur | non_dup | [] |
83852800 | 10.1007/JHEP10(2017)018 | The clockwork mechanism is a means of naturally generating exponential
hierarchies in theories without significant hierarchies among fundamental
parameters. We emphasize the role of interactions in the clockwork mechanism,
demonstrating that clockwork is an intrinsically abelian phenomenon precluded
in non-abelian theories such as Yang-Mills, non-linear sigma models, and
gravity. We also show that clockwork is not realized in extra-dimensional
theories through purely geometric effects, but may be generated by appropriate
localization of zero modes.Comment: 30 pages plus appendices, 4 figures. v2: Clarifications, minor
changes, and comment on 1705.10162 added. Conclusions unchange | Disassembling the Clockwork Mechanism | disassembling the clockwork mechanism | clockwork naturally generating exponential hierarchies hierarchies parameters. emphasize clockwork demonstrating clockwork intrinsically abelian phenomenon precluded abelian mills sigma gravity. clockwork realized extra purely geometric localization pages appendices figures. clarifications minor comment added. unchange | non_dup | [] |
83855773 | 10.1007/JHEP10(2017)020 | We present a calculation of the hadronic vacuum polarization contribution to
the muon anomalous magnetic moment, $a_\mu^{\mathrm hvp}$, in lattice QCD
employing dynamical up and down quarks. We focus on controlling the infrared
regime of the vacuum polarization function. To this end we employ several
complementary approaches, including Pad\'e fits, time moments and the
time-momentum representation. We correct our results for finite-volume effects
by combining the Gounaris-Sakurai parameterization of the timelike pion form
factor with the L\"uscher formalism. On a subset of our ensembles we have
derived an upper bound on the magnitude of quark-disconnected diagrams and
found that they decrease the estimate for $a_\mu^{\mathrm hvp}$ by at most 2%.
Our final result is $a_\mu^{\mathrm hvp}=(654\pm32\,{}^{+21}_{-23})\cdot
10^{-10}$, where the first error is statistical, and the second denotes the
combined systematic uncertainty. Based on our findings we discuss the prospects
for determining $a_\mu^{\mathrm hvp}$ with sub-percent precision.Comment: 42 pages, 7 figures, version published in JHE | The hadronic vacuum polarization contribution to the muon $g-2$ from
lattice QCD | the hadronic vacuum polarization contribution to the muon $g-2$ from lattice qcd | hadronic muon anomalous moment mathrm employing quarks. controlling infrared function. employ complementary fits moments representation. combining gounaris sakurai parameterization timelike pion uscher formalism. ensembles disconnected diagrams mathrm mathrm cdot uncertainty. prospects determining mathrm percent pages | non_dup | [] |
84092516 | 10.1007/JHEP10(2017)021 | In this work we propose an effective low-energy theory for a large class of
2+1 dimensional non-Abelian topological spin liquids whose edge states are
conformal degrees of freedom with central charges corresponding to the coset
structure $su(2)_k\oplus su(2)_{k'}/su(2)_{k+k'}$. For particular values of
$k'$ it furnishes the series for unitary minimal and superconformal models.
These gapped phases were recently suggested to be obtained from an array of
one-dimensional coupled quantum wires. In doing so we provide an explicit
relationship between two distinct approaches: quantum wires and Chern-Simons
bulk theory. We firstly make a direct connection between the interacting
quantum wires and the corresponding conformal field theory at the edges, which
turns out to be given in terms of chiral gauged WZW models. Relying on the
bulk-edge correspondence we are able to construct the underlying non-Abelian
Chern-Simons effective field theory.Comment: 41 pages, 5 figures, typos corrected, references added, published
versio | Effective Theories for 2+1 Dimensional Non-Abelian Topological Spin
Liquids | effective theories for 2+1 dimensional non-abelian topological spin liquids | propose abelian topological liquids conformal freedom charges coset oplus furnishes unitary superconformal models. gapped array wires. wires chern simons theory. firstly connection interacting wires conformal turns chiral gauged models. relying correspondence abelian chern simons pages typos corrected versio | non_dup | [] |
73993327 | 10.1007/JHEP10(2017)022 | We calculate the spectrum of light glueballs and the string tension in a
number of SO(N) lattice gauge theories in 2+1 dimensions, with N in the range
from N=3 to N=16. After extrapolating to the continuum limit and then to N=oo
we compare to the spectrum and string tension of the SU(N=oo) gauge theory and
find that the most reliably and precisely calculated physical quantities are
consistent in that limit. We also compare the glueball spectra of those pairs
of SO(N) and SU(N') theories that possess the same Lie algebra, i.e. SO(3) and
SU(2), SO(4) and SU(2)xSU(2), SO(6) and SU(4), and find that for the very
lightest glueballs the spectra are consistent within each such pair, as are the
string tensions and the couplings. Where there are apparent discrepancies they
are typically for heavier glueballs, where the systematic errors are much
harder to control. We calculate the SO(N) string tensions with a particular
focus on the confining properties of SO(2N+1) theories which, unlike SO(2N)
theories, possess a trivial centre. We find that for both the light glueballs
and for the string tension SO(2N) and SO(2N+1) gauge theories appear to form a
single smooth sequence.Comment: 99 pages, 32 figures, new SO6 calculations, others revised; more on
confinement; mass estimates graded for reliabilit | SO(N) gauge theories in 2+1 dimensions: glueball spectra and confinement | so(n) gauge theories in 2+1 dimensions: glueball spectra and confinement | glueballs tension extrapolating continuum tension reliably precisely quantities limit. glueball possess i.e. lightest glueballs tensions couplings. apparent discrepancies heavier glueballs harder control. tensions confining unlike possess trivial centre. glueballs tension pages revised confinement graded reliabilit | non_dup | [] |
84095174 | 10.1007/JHEP10(2017)023 | We construct solutions of IIB supergravity dual to non-supersymmetric states
of the D1D5 system. These solutions are constructed as perturbations carrying
both left and right moving momentum around the maximally rotating D1D5 ground
state at linear order. They are found by extending to the asymptotically flat
region the geometry generated in the decoupling limit by the action of left and
right R-currents on a known D1D5 microstate. The perturbations are regular
everywhere and do not carry any global charge. We also study the near-extremal
limit of the solutions and derive the first non-trivial correction to the
extremal geometry.Comment: 25 page | Non-extremal superdescendants of the D1D5 CFT | non-extremal superdescendants of the d1d5 cft | supergravity supersymmetric system. perturbations carrying moving maximally rotating order. extending asymptotically decoupling currents microstate. perturbations everywhere carry charge. extremal derive trivial extremal | non_dup | [] |
84326594 | 10.1007/JHEP10(2017)024 | We elaborate on the class of deformed T-dual (DTD) models obtained by first
adding a topological term to the action of a supercoset sigma model and then
performing (non-abelian) T-duality on a subalgebra $\tilde{\mathfrak{g}}$ of
the superisometry algebra. These models inherit the classical integrability of
the parent one, and they include as special cases the so-called homogeneous
Yang-Baxter sigma models as well as their non-abelian T-duals. Many properties
of DTD models have simple algebraic interpretations. For example we show that
their (non-abelian) T-duals---including certain deformations---are again in the
same class, where $\tilde{\mathfrak{g}}$ gets enlarged or shrinks by adding or
removing generators corresponding to the dualised isometries. Moreover, we show
that Weyl invariance of these models is equivalent to $\tilde{\mathfrak{g}}$
being unimodular; when this property is not satisfied one can always remove one
generator to obtain a unimodular $\tilde{\mathfrak{g}}$, which is equivalent to
(formal) T-duality. We also work out the target space superfields and, as a
by-product, we prove the conjectured transformation law for Ramond-Ramond (RR)
fields under bosonic non-abelian T-duality of supercosets, generalising it to
cases involving also fermionic T-dualities.Comment: 25 pages. Comments added. Published versio | On non-abelian T-duality and deformations of supercoset string
sigma-models | on non-abelian t-duality and deformations of supercoset string sigma-models | elaborate deformed adding topological supercoset sigma performing abelian duality subalgebra tilde mathfrak superisometry algebra. inherit integrability parent homogeneous baxter sigma abelian duals. algebraic interpretations. abelian duals deformations tilde mathfrak gets enlarged shrinks adding removing generators dualised isometries. weyl invariance tilde mathfrak unimodular satisfied remove generator unimodular tilde mathfrak formal duality. superfields conjectured ramond ramond bosonic abelian duality supercosets generalising involving fermionic pages. comments added. versio | non_dup | [] |
73390359 | 10.1007/JHEP10(2017)025 | When the Lyapunov exponent $\lambda_L$ in a quantum chaotic system saturates
the bound $\lambda_L\leqslant 2\pi k_BT$, it is proposed that this system has a
holographic dual described by a gravity theory. In particular, the butterfly
effect as a prominent phenomenon of chaos can ubiquitously exist in a black
hole system characterized by a shockwave solution near the horizon. In this
paper we propose that the butterfly velocity can be used to diagnose quantum
phase transition (QPT) in holographic theories. We provide evidences for this
proposal with an anisotropic holographic model exhibiting metal-insulator
transitions (MIT), in which the derivatives of the butterfly velocity with
respect to system parameters characterizes quantum critical points (QCP) with
local extremes in zero temperature limit. We also point out that this proposal
can be tested by experiments in the light of recent progress on the measurement
of out-of-time-order correlation function (OTOC).Comment: 7 figures, 15 page | Holographic Butterfly Effect at Quantum Critical Points | holographic butterfly effect at quantum critical points | lyapunov exponent lambda chaotic saturates lambda leqslant holographic theory. butterfly prominent phenomenon chaos ubiquitously shockwave horizon. propose butterfly diagnose holographic theories. evidences proposal anisotropic holographic exhibiting insulator derivatives butterfly characterizes extremes limit. proposal progress otoc .comment | non_dup | [] |
42749387 | 10.1007/JHEP10(2017)026 | We consider weakly-coupled theories of massive higher-spin particles. This
class of models includes, for instance, tree-level String Theory and Large-N
Yang-Mills theory. The S-matrix in such theories is a meromorphic function
obeying unitarity and crossing symmetry. We discuss the (unphysical) regime
$s,t \gg 1$, in which we expect the amplitude to be universal and exponentially
large. We develop methods to study this regime and show that the amplitude
necessarily coincides with the Veneziano amplitude there. In particular, this
implies that the leading Regge trajectory, $j(t)$, is asymptotically linear in
Yang-Mills theory. Further, our analysis shows that any such theory of
higher-spin particles has stringy excitations and infinitely many
asymptotically parallel subleading trajectories. More generally, we argue that,
under some assumptions, any theory with at least one higher-spin particle must
have strings.Comment: 44 pages, 5 figure | Strings from Massive Higher Spins: The Asymptotic Uniqueness of the
Veneziano Amplitude | strings from massive higher spins: the asymptotic uniqueness of the veneziano amplitude | weakly massive particles. mills theory. meromorphic obeying unitarity crossing symmetry. unphysical universal exponentially large. necessarily coincides veneziano there. regge trajectory asymptotically mills theory. stringy excitations infinitely asymptotically subleading trajectories. argue assumptions pages | non_dup | [] |
84326986 | 10.1007/JHEP10(2017)028 | Universal spacetimes are exact solutions to all higher-order theories of
gravity. We study these spacetimes in four dimensions and provide necessary and
sufficient conditions for universality for all Petrov types except of type II.
We show that all universal spacetimes in four dimensions are algebraically
special and Kundt. Petrov type D universal spacetimes are necessarily direct
products of two 2-spaces of constant and equal curvature. Furthermore, type II
universal spacetimes necessarily possess a null recurrent direction and they
admit the above type D direct product metrics as a limit. Such spacetimes
represent gravitational waves propagating on these backgrounds. Type III
universal spacetimes are also investigated. We determine necessary and
sufficient conditions for universality and present an explicit example of a
type III universal Kundt non-recurrent metric.Comment: 20 pages, Introduction and Conclusions slightly extended, Table 1
added. Matches published versio | Universal spacetimes in four dimensions | universal spacetimes in four dimensions | universal spacetimes gravity. spacetimes universality petrov universal spacetimes algebraically kundt. petrov universal spacetimes necessarily curvature. universal spacetimes necessarily possess recurrent admit metrics limit. spacetimes gravitational propagating backgrounds. universal spacetimes investigated. universality universal kundt recurrent pages added. matches versio | non_dup | [] |
83855933 | 10.1007/JHEP10(2017)029 | Recent encouraging experimental results on neutrino mixing parameters prompt
further investigation on $SO(10)$-inspired leptogenesis and on the associated
strong thermal solution that has correctly predicted a non-vanishing reactor
mixing angle, it further predicts $\sin\delta \lesssim 0$, now supported by
recent results at $\sim 95\%$ C.L., normally ordered neutrino masses and
atmospheric mixing angle in the first octant, best fit results in latest global
analyses. Extending a recent analytical procedure, we account for the mismatch
between the Yukawa basis and the weak basis, that in $SO(10)$-inspired models
is described by a CKM-like unitary transformation $V_L$, obtaining a full
analytical solution that provides useful insight and reproduces accurately all
numerical results, paving the way for future inclusion of different sources of
theoretical uncertainties and for a statistical analysis of the constraints. We
show how muon-dominated solutions appear for large values of the lightest
neutrino mass in the range $(0.01$--$1)\,{\rm eV}$ but also how they
necessarily require a mild fine tuning in the seesaw relation. For the dominant
(and untuned) tauon-dominated solutions we show how, turning on $V_L \simeq
V_{CKM}$, some of the constraints on the low energy neutrino parameters get
significantly relaxed. In particular we show how the upper bound on the
atmospheric neutrino mixing angle in the strong thermal solution gets relaxed
from $\theta_{23} \lesssim 41^{\circ}$ to $\theta_{23} \lesssim 44^{\circ}$, an
important effect in the light of the most recent NO$\nu$A, T2K and IceCube
results.Comment: 34 pages, 4 figures; v2: matches JHEP versio | A full analytic solution of $SO(10)$-inspired leptogenesis | a full analytic solution of $so(10)$-inspired leptogenesis | encouraging prompt inspired leptogenesis correctly vanishing reactor predicts delta lesssim c.l. normally ordered octant latest analyses. extending mismatch yukawa inspired unitary obtaining insight reproduces accurately paving inclusion constraints. muon dominated lightest necessarily mild fine tuning seesaw relation. untuned tauon dominated turning simeq relaxed. gets relaxed theta lesssim circ theta lesssim circ icecube pages matches jhep versio | non_dup | [] |
86421326 | 10.1007/JHEP10(2017)030 | We derive an all-order factorization theorem for the narrow jet broadening
event shape, a measure of the transverse momentum in jet events. This is a
non-global observable which receives logarithmically enhanced contributions
associated with the large rapidity difference between soft and collinear
radiation and which is also sensitive to soft recoil effects. Our work is the
first factorization analysis of an observable of this type and we show that
with regard to the non-global nature, the rapidity logarithms do not constitute
an essential complication since they can be tied to the jet function, which is
the same as for global observables. As a consequence, the leading non-global
logarithms in narrow jet broadening are encoded in the same overall factor
relevant for the hemisphere soft function and light jet mass.Comment: 13 pages, 1 figur | Non-global and rapidity logarithms in narrow jet broadening | non-global and rapidity logarithms in narrow jet broadening | derive factorization narrow broadening events. observable receives logarithmically rapidity collinear recoil effects. factorization observable regard rapidity logarithms constitute complication tied observables. logarithms narrow broadening encoded hemisphere pages figur | non_dup | [] |
83864364 | 10.1007/JHEP10(2017)031 | We analyze the factorization to subleading power in the flavor changing
neutral current process $\bar B\to X_s \ell^+ \ell^-$. In particular, we
compute the so-called resolved contributions and explore the numerical impact
on observables. In these contributions the virtual photon couples to light
partons instead of connecting directly to the effective weak-interaction
vertex. They represent an irreducible uncertainty in the inclusive $\bar B \to
X_s \ell^+ \ell^-$ decay which cannot be removed by relaxing the experimentally
necessary cuts in the hadronic mass spectrum.Comment: 32 pages,18 figure | Subleading Power Factorization in $\bar B \to X_s \ell^+\ell^-$ | subleading power factorization in $\bar b \to x_s \ell^+\ell^-$ | analyze factorization subleading flavor changing neutral resolved explore observables. virtual couples partons connecting vertex. irreducible inclusive removed relaxing experimentally cuts hadronic pages | non_dup | [] |
86414044 | 10.1007/JHEP10(2017)032 | We study Pfaffians that appear in non-perturbative superpotential terms
arising from worldsheet instantons in heterotic theories. A result by Beasley
and Witten shows that these instanton contributions cancel among curves within
a given homology class for Calabi-Yau manifolds that can be described as
hypersurfaces or complete intersections in projective or toric ambient spaces.
We provide a prescription that identifies all $\mathbb{P}^1$ curves in certain
homology classes of complete intersection Calabi-Yau manifolds in products of
projective spaces (CICYs) and cross-check our results by a comparison with the
genus zero Gromov-Witten invariants. We then use this construction to study
instanton superpotentials on those manifolds and their quotients. We identify a
non-toric quotient of a non-favorable CICY with a single genus zero curve in a
certain homology class, so that a cancellation \`a la Beasley-Witten is not
possible. In another example, we study a non-toric quotient of a favorable CICY
and check that the superpotential still vanishes. From this and related
examples, we conjecture that the Beasley-Witten cancellation result can be
extended to toric and non-toric quotients of CICYs, but can be avoided if the
CICY is non-favorable.Comment: 25 pages, 3 figure | Heterotic Instanton Superpotentials from Complete Intersection
Calabi-Yau Manifolds | heterotic instanton superpotentials from complete intersection calabi-yau manifolds | pfaffians perturbative superpotential arising worldsheet instantons heterotic theories. beasley witten instanton cancel homology calabi manifolds hypersurfaces intersections projective toric ambient spaces. prescription identifies mathbb homology intersection calabi manifolds projective cicys check genus gromov witten invariants. instanton superpotentials manifolds quotients. toric quotient favorable cicy genus homology cancellation beasley witten possible. toric quotient favorable cicy check superpotential vanishes. conjecture beasley witten cancellation toric toric quotients cicys avoided cicy pages | non_dup | [] |
83868973 | 10.1007/JHEP10(2017)033 | We present in the context of supersymmetric gauge theories an extension of
the Weyl integration formula, first discovered by Robert Wendt, which applies
to a class of non-connected Lie groups. This allows to count in a systematic
way gauge-invariant chiral operators for these non-connected gauge groups.
Applying this technique to $\mathrm{O}(n)$, we obtain, via the ADHM
construction, the Hilbert series for certain instanton moduli spaces. We
validate our general method and check our results via a Coulomb branch
computation, using three-dimensional mirror symmetry | Non-Connected Gauge Groups and the Plethystic Program | non-connected gauge groups and the plethystic program | supersymmetric weyl discovered robert wendt applies groups. count chiral groups. mathrm adhm hilbert instanton moduli spaces. validate check coulomb branch mirror | non_dup | [] |
83858694 | 10.1007/JHEP10(2017)034 | Within gauge/gravity duality, we consider the local quench-like time
evolution obtained by joining two 1+1-dimensional heat baths at different
temperatures at time t=0. A steady state forms and expands in space. For the
2+1-dimensional gravity dual, we find that the shockwaves expanding the
steady-state region are of spacelike nature in the bulk despite being null at
the boundary. However, they do not transport information. Moreover, by adapting
the time-dependent Hubeny-Rangamani-Takayanagi prescription, we holographically
calculate the entanglement entropy and also the mutual information for
different entangling regions. For general temperatures, we find that the
entanglement entropy increase rate satisfies the same bound as in the
"entanglement tsunami" setups. For small temperatures of the two baths, we
derive an analytical formula for the time dependence of the entanglement
entropy. This replaces the entanglement tsunami-like behaviour seen for high
temperatures. Finally, we check that strong subadditivity holds in this
time-dependent system, as well as further more general entanglement
inequalities for five or more regions recently derived for the static case.Comment: 57 pages, 25 figures. v2: Minor revisions and references added. v3:
Referee's comments included. The numerical codes described in this paper are
available in the ancillary files directory (anc/) of this submissio | Time evolution of entanglement for holographic steady state formation | time evolution of entanglement for holographic steady state formation | duality quench joining baths steady expands space. shockwaves expanding steady spacelike boundary. information. adapting hubeny rangamani takayanagi prescription holographically entanglement mutual entangling regions. entanglement satisfies entanglement tsunami setups. baths derive entanglement entropy. replaces entanglement tsunami temperatures. check subadditivity entanglement inequalities pages figures. minor revisions added. referee comments included. codes ancillary files directory submissio | non_dup | [] |
74251416 | 10.1007/JHEP10(2017)035 | We consider the analogue of Kutasov-Schwimmer-Seiberg duality for
two-dimensional $\mathcal{N}=(2,2)$ $U(k)$ gauge theory with one adjoint $X$
with the superpotential $\Tr X^{l+1}$ and with fundamental and anti-fundamantal
chiral multiplets. We give the evidences for the proposed dualities by
analytically proving that the elliptic genus of dual pair coincides with each
other. For some of the dual pairs flowing to the superconformal field theory,
we show the nonperturbative truncation of the chiral ring. For the theory with
one adjoint and $N_f >k$ fundamentals, we argue the theory exhibits mass gap.Comment: 31 pages; references added and typos corrected, contents expande | 2D Seiberg-like dualities with an adjoint matter | 2d seiberg-like dualities with an adjoint matter | analogue kutasov schwimmer seiberg duality mathcal adjoint superpotential fundamantal chiral multiplets. evidences dualities analytically proving elliptic genus coincides other. flowing superconformal nonperturbative truncation chiral ring. adjoint fundamentals argue exhibits pages typos corrected contents expande | non_dup | [] |
83845759 | 10.1007/JHEP10(2017)036 | We revisit the radiative decays of the Higgs boson to a fermion pair
$h\rightarrow f\bar{f}\gamma$ where $f$ denotes a fermion in the Standard Model
(SM). We include the chirality-flipping diagrams via the Yukawa couplings at
the order $\mathcal{O}(y_f^2 \alpha)$, the chirality-conserving contributions
via the top-quark loops of the order $\mathcal{O}(y_t^2 \alpha^3)$, and the
electroweak loops at the order $\mathcal{O}(\alpha^4)$. The QED correction is
about $Q_f^2\times {\cal O}(1\%)$ and contributes to the running of fermion
masses at a similar level, which should be taken into account for future
precision Higgs physics. The chirality-conserving electroweak-loop processes
are interesting from the observational point of view. First, the branching
fraction of the radiative decay $h \to \mu^+\mu^- \gamma$ is about a half of
that of $h \to \mu^+\mu^-$, and that of $h \to e^+ e^- \gamma$ is more than
four orders of magnitude larger than that of $h \to e^+ e^-$, both of which
reach about $10^{-4}$. The branching fraction of $h \to \tau^+\tau^- \gamma$ is
of the order $10^{-3}$. All the leptonic radiative decays are potentially
observable at the LHC Run 2 or the HL-LHC. The kinematic distributions for the
photon energy or the fermion pair invariant mass provide non-ambiguous
discrimination for the underlying mechanisms of the Higgs radiative decay. We
also study the process $h \to c\bar c \gamma$ and evaluate the observability at
the LHC. We find it comparable to the other related studies and better than the
$h \to J/\psi\ \gamma$ channel in constraining the charm-Yukawa coupling.Comment: 23 pages, 6 figures, 6 tables; Minor corrections, references updated,
version published in JHE | Radiative Decays of the Higgs Boson to a Pair of Fermions | radiative decays of the higgs boson to a pair of fermions | revisit radiative decays boson fermion rightarrow gamma fermion chirality flipping diagrams yukawa couplings mathcal alpha chirality conserving loops mathcal alpha electroweak loops mathcal alpha contributes running fermion precision physics. chirality conserving electroweak observational view. branching radiative gamma gamma orders branching gamma leptonic radiative decays potentially observable lhc. kinematic fermion ambiguous discrimination radiative decay. gamma observability lhc. comparable gamma constraining charm yukawa pages tables minor updated | non_dup | [] |
83866031 | 10.1007/JHEP10(2017)037 | For some theories where the degrees of freedom are tensors of rank $3$ or
higher, there exist solvable large $N$ limits dominated by the melonic
diagrams. Simple examples are provided by models containing one rank-$3$ tensor
in the tri-fundamental representation of the $O(N)^3$ symmetry group. When the
quartic interaction is assumed to have a special tetrahedral index structure,
the coupling constant $g$ must be scaled as $N^{-3/2}$ in the melonic large $N$
limit. In this paper we consider the combinatorics of a large $N$ theory of one
fully symmetric and traceless rank-$3$ tensor with the tetrahedral quartic
interaction; this model has a single $O(N)$ symmetry group. We explicitly
calculate all the vacuum diagrams up to order $g^8$, as well as some diagrams
of higher order, and find that in the large $N$ limit where $g^2 N^3$ is held
fixed only the melonic diagrams survive. While some non-melonic diagrams are
enhanced in the $O(N)$ symmetric theory compared to the $O(N)^3$ one, we have
not found any diagrams where this enhancement is strong enough to make them
comparable with the melonic ones. Motivated by these results, we conjecture
that the model of a real rank-$3$ symmetric traceless tensor possesses a smooth
large $N$ limit where $g^2 N^3$ is held fixed and all the contributing diagrams
are melonic. A feature of the symmetric traceless tensor models is that some
vacuum diagrams containing odd numbers of vertices are suppressed only by
$N^{-1/2}$ relative to the melonic graphs.Comment: 18 pages, 12 figures; v2: minor improvements, references adde | On Large $N$ Limit of Symmetric Traceless Tensor Models | on large $n$ limit of symmetric traceless tensor models | freedom tensors solvable dominated melonic diagrams. group. quartic tetrahedral scaled melonic limit. combinatorics traceless tetrahedral quartic group. explicitly diagrams diagrams held melonic diagrams survive. melonic diagrams diagrams enhancement comparable melonic ones. motivated conjecture traceless possesses held contributing diagrams melonic. traceless diagrams suppressed melonic pages minor improvements adde | non_dup | [] |
84091375 | 10.1007/JHEP10(2017)038 | We revisit the chiral transition in the finite density Sakai-Sugimoto model
and find that, at fixed temperature $T$, the magnetisation near the critical
line $\mu_c(B)$ acts as an order parameter to distinguish Inverse Magnetic
Catalysis from Magnetic Catalysis. Moreover, we propose a universal relation
between $\mu_c (B)$ and the magnetisation that allows us to predict the
behaviour of the former from the behaviour of the latter. We find that a
similar relation holds, at fixed chemical potential $\mu$, for the critical
line $T_c(B)$. Our results are obtained by investigating a fully numerical
solution to the relevant equations. At low temperatures our results reduce to
those obtained by Preis, Rebhan and Schmitt [JHEP 1103 (2011) 033], based on a
semi-analytic approximation.Comment: 37 pages, 17 figures; v3: References added; JHEP published versio | A universal order parameter for Inverse Magnetic Catalysis | a universal order parameter for inverse magnetic catalysis | revisit chiral sakai sugimoto magnetisation acts distinguish catalysis catalysis. propose universal magnetisation predict former latter. investigating equations. preis rebhan schmitt jhep analytic pages jhep versio | non_dup | [] |
84331096 | 10.1007/JHEP10(2017)039 | In this paper we propose a novel supersymmetric inverse seesaw model which
has only one additional $Z_6$ symmetry. The field content is minimal to get a
viable neutrino spectrum at tree-level. Interestingly, the inverse seesaw scale
in our model is related to the scale of electroweak symmetry breaking. Due to
that origin we are less biased about hierarchies and discuss three different
types of the inverse seesaw mechanism with different phenomenologies. We can
successfully reproduce neutrino masses and mixing and our model is consistent
with current bounds on neutrinoless double beta decay, non-unitarity of the
PMNS matrix and charged lepton flavor violation.Comment: 20 pages, 1 figure; version published in JHE | A supersymmetric electroweak scale seesaw model | a supersymmetric electroweak scale seesaw model | propose supersymmetric seesaw symmetry. viable level. interestingly seesaw electroweak breaking. biased hierarchies seesaw phenomenologies. successfully reproduce bounds neutrinoless beta unitarity pmns lepton flavor pages | non_dup | [] |
83863248 | 10.1007/JHEP10(2017)040 | The AdS/CFT duality maps supersymmetric heavy operators with conformal
dimension of the order of the central charge to asymptotically AdS supergravity
solutions. We show that by studying the quadratic fluctuations around such
backgrounds it is possible to derive the 4-point correlators of two light and
two heavy states in the supergravity approximation. We provide an explicit
example in the AdS$_3$ setup relevant for the duality with the D1-D5 CFT.
Contrary to previously studied examples, the supergravity correlator derived in
this work differs from the result obtained at the CFT orbifold point. Our
method bypasses the difficulties of applying the standard Witten's diagrams
approach to correlators with operators of large conformal dimension and also
avoids some technical steps that have made the computation of dynamical 4-point
correlators in the AdS$_3$/CFT$_2$ context unfeasible until now.Comment: 31 pages; v3: citations added, typos correcte | Holographic 4-point correlators with heavy states | holographic 4-point correlators with heavy states | duality supersymmetric conformal asymptotically supergravity solutions. studying quadratic backgrounds derive correlators supergravity approximation. setup duality cft. contrary supergravity correlator differs orbifold point. bypasses difficulties witten diagrams correlators conformal avoids correlators unfeasible pages citations typos correcte | non_dup | [] |
86415145 | 10.1007/JHEP10(2017)041 | We present the next-to-next-to-next-to-leading order (N^3LO) contributions to
the non-singlet splitting functions for both parton distribution and
fragmentation functions in perturbative QCD. The exact expressions are derived
for the terms contributing in the limit of a large number of colours. For the
remaining contributions, approximations are provided that are sufficient for
all collider-physics applications. From their threshold limits we derive
analytical and high-accuracy numerical results, respectively, for all
contributions to the four-loop cusp anomalous dimension for quarks, including
the terms proportional to quartic Casimir operators. We briefly illustrate the
numerical size of the four-loop corrections, and the remarkable
renormalization-scale stability of the N^3LO results, for the evolution of the
non-singlet parton distribution and the fragmentation functions. Our results
appear to provide a first point of contact of four-loop QCD calculations and
the so-called wrapping corrections to anomalous dimensions in N=4 super
Yang-Mills theory.Comment: 73 pages latex, 14 figures, ancillary Form and Fortran files, final
version to appear in JHE | Four-Loop Non-Singlet Splitting Functions in the Planar Limit and Beyond | four-loop non-singlet splitting functions in the planar limit and beyond | singlet splitting parton fragmentation perturbative qcd. expressions contributing colours. approximations collider applications. derive cusp anomalous quarks quartic casimir operators. briefly illustrate remarkable renormalization singlet parton fragmentation functions. wrapping anomalous super mills pages latex ancillary fortran files | non_dup | [] |
84330755 | 10.1007/JHEP10(2017)042 | We study (non-)integrability and the presence of chaos in gravity dual
backgrounds of strongly coupled gauge theories with unquenched flavor,
specifically of the four-dimensional N=2 super Yang-Mills theory and the
three-dimensional ABJM theory. By examining string motion on the geometries
corresponding to backreacted D3/D7 and D2/D6 systems, we show that integrable
theories with quenched flavor become non-integrable when the virtual quark
loops are taken into account. For the string solutions in the backreacted D3/D7
system, we compute the leading Lyapunov exponent which turns out to saturate to
a positive value as the number of flavors increases. The exponent depends very
weakly on the number of flavors when they approach the number of colors. This
suggests that once a particular flavor number in the theory is reached, a
further increase does not lead to more severe chaotic phenomena, implying
certain saturation effects on chaos.Comment: 34 pages, 6 figures; v2: minor additions, references adde | Non-integrability and Chaos with Unquenched Flavor | non-integrability and chaos with unquenched flavor | integrability chaos backgrounds unquenched flavor super mills abjm theory. examining geometries backreacted integrable quenched flavor integrable virtual loops account. backreacted lyapunov exponent turns saturate flavors increases. exponent weakly flavors colors. flavor reached chaotic phenomena implying saturation pages minor additions adde | non_dup | [] |
93938002 | 10.1007/JHEP10(2017)043 | The production of a neutral and a charged vector boson with subsequent decays
into three charged leptons and a neutrino is a very important process for
precision tests of the Standard Model of elementary particles and in searches
for anomalous triple-gauge-boson couplings. In this article, the first
computation of next-to-leading-order electroweak corrections to the production
of the four-lepton final states $\mu^+\mu^- e^+ \nu_e$, $\mu^+\mu^- e^-
\bar\nu_e$, $\mu^+\mu^- \mu^+\nu_\mu$, and $\mu^+\mu^- \mu^- \bar\nu_\mu$ at
the Large Hadron Collider is presented. We use the complete matrix elements at
leading and next-to-leading order, including all off-shell effects of
intermediate massive vector bosons and virtual photons. The relative
electroweak corrections to the fiducial cross sections from quark-induced
partonic processes vary between $-3\%$ and $-6\%$, depending significantly on
the event selection. At the level of differential distributions, we observe
large negative corrections of up to $-30\%$ in the high-energy tails of
distributions originating from electroweak Sudakov logarithms. Photon-induced
contributions at next-to-leading order raise the leading-order fiducial cross
section by $+2\%$. Interference effects in final states with equal-flavour
leptons are at the permille level for the fiducial cross section, but can lead
to sizeable effects in off-shell sensitive phase-space regions.Comment: 20 pages, 18 figure | Next-to-leading-order electroweak corrections to the production of three
charged leptons plus missing energy at the LHC | next-to-leading-order electroweak corrections to the production of three charged leptons plus missing energy at the lhc | neutral boson decays leptons precision elementary searches anomalous triple boson couplings. electroweak lepton hadron collider presented. massive bosons virtual photons. electroweak fiducial partonic vary selection. tails originating electroweak sudakov logarithms. raise fiducial interference flavour leptons permille fiducial sizeable pages | non_dup | [] |
86416456 | 10.1007/JHEP10(2017)044 | In supersymmetric theories like the Next-to-Minimal Supersymmetric Standard
Model (NMSSM), the lightest neutralino with bino or singlino as its dominant
component is customarily taken as dark matter (DM) candidate. Since light
Higgsinos favored by naturalness can strength the couplings of the DM and thus
enhance the DM-nucleon scattering rate, the tension between naturalness and DM
direct detection results becomes more and more acute with the improved
experimental sensitivity. In this work, we extend the NMSSM by inverse seesaw
mechanism to generate neutrino mass, and show that in certain parameter space
the lightest sneutrino may act as a viable DM candidate, i.e. it can annihilate
by multi-channels to get correct relic density and meanwhile satisfy all
experimental constraints. The most striking feature of the extension is that
the DM-nucleon scattering rate can be naturally below its current experimental
bounds regardless of the higgsino mass, and hence it alleviates the tension
between naturalness and DM experiments. Other interesting features include that
the Higgs phenomenology becomes much richer than that of the original NMSSM due
to the relaxed constraints from DM physics and also due to the presence of
extra neutrinos, and that the signatures of sparticles at colliders are quite
different from those with neutralino as DM candidate.Comment: 33 page | Sneutrino DM in the NMSSM with inverse seesaw mechanism | sneutrino dm in the nmssm with inverse seesaw mechanism | supersymmetric supersymmetric nmssm lightest neutralino bino singlino customarily candidate. higgsinos favored naturalness couplings enhance nucleon tension naturalness sensitivity. extend nmssm seesaw lightest sneutrino viable candidate i.e. annihilate relic meanwhile satisfy constraints. striking nucleon naturally bounds regardless higgsino alleviates tension naturalness experiments. phenomenology richer nmssm relaxed extra neutrinos signatures sparticles colliders neutralino | non_dup | [] |
78508512 | 10.1007/JHEP10(2017)045 | We explore two classes of 6d $\mathcal{N}=(1,0)$ little string theories
obtained from type IIA/IIB NS5-branes probing $D_n$ singularities. Their tensor
branches are described by effective gauge theories whose instanton solitons are
macroscopic little strings. We specifically study two families of 2d
$\mathcal{N}=(0,4)$ gauge theories which describe at low energy the worldsheet
dynamics of the type IIA/IIB little strings. These gauge theories are useful to
calculate the supersymmetric partition functions of the little string theories
on $\mathbf{R}^4 \times T^2$. We establish the T-duality of the little string
theories by utilizing their BPS spectra as a probe.Comment: 29 pages, 9 figures; v2: minor changes, published versio | Little strings on $D_n$ orbifolds | little strings on $d_n$ orbifolds | explore mathcal branes probing singularities. branches instanton solitons macroscopic strings. families mathcal worldsheet strings. supersymmetric partition mathbf establish duality utilizing pages minor versio | non_dup | [] |
93938212 | 10.1007/JHEP10(2017)046 | A Double Field Theory (DFT) description of gauge symmetry enhancing-breaking
in the heterotic string is presented. The construction, based on previous
results for the bosonic string, relies on the extension of the tangent frame of
DFT. The fluxes of a Scherk-Schwarz like generalized toroidal compactification
are moduli dependent and become identified with the structure constants of the
enhanced group at fixed "self-dual" points in moduli space. Slight
displacements from such points provide the breaking of the symmetry, gauge
bosons acquiring masses proportional to fluxes. The inclusion of fermions is
also discussed.Comment: 28 page | Double Field Theory description of Heterotic gauge symmetry
enhancing-breaking | double field theory description of heterotic gauge symmetry enhancing-breaking | enhancing breaking heterotic presented. bosonic relies tangent dft. fluxes scherk schwarz toroidal compactification moduli moduli space. slight displacements breaking bosons acquiring fluxes. inclusion fermions | non_dup | [] |
83850818 | 10.1007/JHEP10(2017)047 | We reconsider a model introducing a scalar leptoquark $\phi \sim (\mathbf{3},
\mathbf{1}, -1/3)$ to explain recent deviations from the standard model in
semileptonic $B$ decays. The leptoquark can accommodate the persistent tension
in the decays $\bar{B}\rightarrow D^{(*)}\tau \bar{\nu}$ as long as its mass is
lower than approximately $10 \text{ TeV}$, and we show that a sizeable Yukawa
coupling to the right-chiral tau lepton is necessary for an acceptable
explanation. Agreement with the measured $\bar{B}\rightarrow D^{(*)}\tau
\bar{\nu}$ rates is mildly compromised for parameter choices addressing the
tensions in $b \to s \mu \mu$, where the model can significantly reduce the
discrepancies in angular observables, branching ratios and the
lepton-flavor-universality observables $R_K$ and $R_{K^*}$. The leptoquark can
also reconcile the predicted and measured value of the anomalous magnetic
moment of the muon and appears naturally in models of radiative neutrino mass
derived from lepton-number violating effective operators. As a representative
example, we incorporate the particle into an existing two-loop neutrino mass
scenario derived from a dimension-nine operator. In this specific model, the
structure of the neutrino mass matrix provides enough freedom to explain the
small masses of the neutrinos in the region of parameter space dictated by
agreement with the anomalies in $\bar{B}\rightarrow D^{(*)}\tau \bar{\nu}$, but
not the $b \to s$ transition. This is achieved without excessive fine-tuning in
the parameters important for neutrino mass.Comment: 43 pages, 17 figures, 3 tables; corrected fit contours in fig. 1 | Reconsidering the One Leptoquark solution: flavor anomalies and neutrino
mass | reconsidering the one leptoquark solution: flavor anomalies and neutrino mass | reconsider introducing leptoquark mathbf mathbf deviations semileptonic decays. leptoquark accommodate persistent tension decays rightarrow sizeable yukawa chiral lepton acceptable explanation. rightarrow mildly compromised choices addressing tensions discrepancies observables branching lepton flavor universality observables leptoquark reconcile anomalous moment muon naturally radiative lepton violating operators. incorporate nine operator. freedom neutrinos dictated anomalies rightarrow transition. excessive fine tuning pages tables corrected contours fig. | non_dup | [] |
84327438 | 10.1007/JHEP10(2017)048 | We present a complete (non-redundant) basis of CP- and flavour-conserving
six-dimensional operators in a two Higgs doublet model (2HDM). We include
Z_2-violating operators as well. In such a 2HDM effective field theory
(2HDMEFT), we estimate how constraining the 2HDM parameter space from
experiments can get disturbed due to these operators. Our basis is motivated by
the strongly interacting light Higgs (SILH) basis used in the standard model
effective field theory (SMEFT). We find out bounds on combinations of Wilson
coefficients of such operators from precision observables, signal strengths of
Higgs decaying into vector bosons etc. In 2HDMEFT, the 2HDM parameter space can
play a significant role while deriving such constraints, by leading to reduced
or even enhanced effects compared to SMEFT in certain processes. We also
comment on the implications of the SILH suppressions in such considerations.Comment: 34 pages, 6 figures; to appear in JHE | Higher dimensional operators in 2HDM | higher dimensional operators in 2hdm | redundant flavour conserving doublet violating well. hdmeft constraining disturbed operators. motivated interacting silh smeft bounds combinations wilson precision observables strengths decaying bosons etc. hdmeft deriving smeft processes. comment silh suppressions pages | non_dup | [] |
83840259 | 10.1007/JHEP10(2017)049 | The Bondi-van der Burg-Metzner-Sachs (BMS) group is the asymptotic symmetry
group of asymptotically flat gravity. Recently, Donnay et al. have derived an
analogous symmetry group acting on black hole event horizons. For a certain
choice of boundary conditions, it is a semidirect product of ${\rm Diff}(S^2)$,
the smooth diffeomorphisms of the two-sphere, acting on $C^\infty(S^2)$, the
smooth functions on the two-sphere. We observe that the same group appears in
fluid dynamics as symmetries of the compressible Euler equations. We relate
these two realizations of ${\rm Diff}(S^2)\ltimes C^\infty(S^2)$ using the
black hole membrane paradigm. We show that the Lie-Poisson brackets of membrane
paradigm fluid charges reproduce the near-horizon BMS algebra. The perspective
presented here may be useful for understanding the BMS algebra at null
infinity.Comment: 18 pages, 3 figure | Near-horizon BMS symmetries as fluid symmetries | near-horizon bms symmetries as fluid symmetries | bondi burg metzner sachs asymptotic asymptotically gravity. donnay analogous acting horizons. semidirect diff diffeomorphisms sphere acting infty sphere. symmetries compressible euler equations. relate realizations diff ltimes infty paradigm. poisson brackets paradigm charges reproduce horizon algebra. perspective pages | non_dup | [] |
84091988 | 10.1007/JHEP10(2017)050 | We study operator insertions into 1/2 BPS Wilson loops in N = 6 ABJM theory
and investigate their two-point correlators. In this framework, the energy
emitted by a heavy moving probe can be exactly obtained from some two-point
coefficients of bosonic and fermionic insertions. This allows us to confirm an
early proposal for computing the Bremsstrahlung function in terms of certain
supersymmetric circular Wilson loops, whose value might be accessible to
localization techniques. In the derivation of this result we also elucidate the
structure of protected multiplets in the relevant superconformal defect theory
and perform an explicit two-loop calculation.Comment: 37 pages, 4 figures, references adde | Wilson lines as superconformal defects in ABJM theory: a formula for the
emitted radiation | wilson lines as superconformal defects in abjm theory: a formula for the emitted radiation | insertions wilson loops abjm correlators. emitted moving bosonic fermionic insertions. confirm proposal bremsstrahlung supersymmetric circular wilson loops accessible localization techniques. derivation elucidate protected multiplets superconformal defect pages adde | non_dup | [] |
93944594 | 10.1007/JHEP10(2017)051 | In contrast to internal symmetries, there is no general proof that the coset
construction for spontaneously broken spacetime symmetries leads to universal
dynamics. One key difference lies in the role of Goldstone bosons, which for
spacetime symmetries includes a subset which are inessential for the non-linear
realisation and hence can be eliminated. In this paper we address two important
issues that arise when eliminating inessential Goldstones.
The first concerns the elimination itself, which is often performed by
imposing so-called inverse Higgs constraints. Contrary to claims in the
literature, there are a series of conditions on the structure constants which
must be satisfied to employ the inverse Higgs phenomenon, and we discuss which
parametrisation of the coset element is the most effective in this regard. We
also consider generalisations of the standard inverse Higgs constraints, which
can include integrating out inessential Goldstones at low energies, and prove
that under certain assumptions these give rise to identical effective field
theories for the essential Goldstones.
Secondly, we consider mappings between non-linear realisations that differ
both in the coset element and the algebra basis. While these can always be
related to each other by a point transformation, remarkably, the inverse Higgs
constraints are not necessarily mapped onto each other under this
transformation. We discuss the physical implications of this non-mapping, with
a particular emphasis on the coset space corresponding to the spontaneous
breaking of the Anti-De Sitter isometries by a Minkowski probe brane | Spontaneously Broken Spacetime Symmetries and the Role of Inessential
Goldstones | spontaneously broken spacetime symmetries and the role of inessential goldstones | symmetries coset spontaneously broken spacetime symmetries universal dynamics. lies goldstone bosons spacetime symmetries inessential realisation eliminated. arise eliminating inessential goldstones. concerns elimination imposing constraints. contrary claims satisfied employ phenomenon parametrisation coset regard. generalisations integrating inessential goldstones assumptions goldstones. secondly mappings realisations coset basis. remarkably necessarily mapped transformation. emphasis coset spontaneous breaking sitter isometries minkowski brane | non_dup | [] |
86418031 | 10.1007/JHEP10(2017)052 | We compute the four-loop $n_f$ contribution proportional to the quartic
Casimir of the QCD cusp anomalous dimension as an expansion for small cusp
angle $\phi$. This piece is gauge invariant, violates Casimir scaling, and
first appears at four loops. It requires the evaluation of genuine non-planar
four-loop Feynman integrals. We present results up to ${\mathcal O}(\phi^4)$.
One motivation for our calculation is to probe a recent conjecture on the
all-order structure of the cusp anomalous dimension. As a byproduct we obtain
the four-loop HQET wave function anomalous dimension for this color structure.Comment: 13 pages, 2 figures, 1 ancillary file; v2: journal versio | On the Casimir scaling violation in the cusp anomalous dimension at
small angle | on the casimir scaling violation in the cusp anomalous dimension at small angle | quartic casimir cusp anomalous cusp piece violates casimir loops. genuine planar feynman integrals. mathcal motivation conjecture cusp anomalous dimension. byproduct hqet anomalous pages ancillary file versio | non_dup | [] |
83832504 | 10.1007/JHEP10(2017)053 | We investigate M-theory and heterotic compactifications to 7 and 3
dimensions. In 7 dimensions we discuss a class of massive supergravities that
arise from M-theory on K3 and point out obstructions to realizing these
theories in a dual heterotic framework with a geometric description. Taking
M-theory further down to 3 dimensions on K3xK3 with a choice of flux leads to a
rich landscape of theories with various amounts of supersymmetry, including
those preserving 6 supercharges. We explore possible heterotic realizations of
these vacua and prove a no--go theorem: every heterotic geometry that preserves
6 supercharges preserves 8 supercharges.Comment: 31 pages; v2: added appendix B with details on flux for N=3, D=3
M-theory vacu | Non-duality in three dimensions | non-duality in three dimensions | heterotic compactifications dimensions. massive supergravities arise obstructions realizing heterotic geometric description. landscape amounts supersymmetry preserving supercharges. explore heterotic realizations vacua heterotic preserves supercharges preserves pages vacu | non_dup | [] |
86420362 | 10.1007/JHEP10(2017)054 | We compute the renormalisation factors (Z-matrices) of the $\Delta F=2$
four-quark operators needed for Beyond the Standard Model (BSM) kaon mixing. We
work with nf=2+1 flavours of Domain-Wall fermions whose chiral-flavour
properties are essential to maintain a continuum-like mixing pattern. We
introduce new RI-SMOM renormalisation schemes, which we argue are better
behaved compared to the commonly-used corresponding RI-MOM one. We find that,
once converted to MS, the Z-factors computed through these RI-SMOM schemes are
in good agreement but differ significantly from the ones computed through the
RI-MOM scheme. The RI-SMOM Z-factors presented here have been used to compute
the BSM neutral kaon mixing matrix elements in the companion paper [1]. We
argue that the renormalisation procedure is responsible for the discrepancies
observed by different collaborations, we will investigate and elucidate the
origin of these differences throughout this work | Neutral kaon mixing beyond the Standard Model with nf=2+1 chiral
fermions part II: Non Perturbative Renormalisation of the $\Delta F=2$
four-quark operators | neutral kaon mixing beyond the standard model with nf=2+1 chiral fermions part ii: non perturbative renormalisation of the $\delta f=2$ four-quark operators | renormalisation delta kaon mixing. flavours fermions chiral flavour maintain continuum pattern. smom renormalisation schemes argue behaved commonly one. converted smom schemes scheme. smom neutral kaon companion argue renormalisation discrepancies collaborations elucidate | non_dup | [] |
84332507 | 10.1007/JHEP10(2017)055 | M5-branes on an ADE singularity are described by certain six-dimensional
"conformal matter" superconformal field theories. Their Higgs moduli spaces
contain information about various dynamical processes for the M5s; however,
they are not directly accessible due to the lack of a Lagrangian formulation.
Using anomaly matching, we compute their dimensions. The result implies that M5
fractions can recombine in several different ways, where the M5s are leaving
behind frozen versions of the singularity. The anomaly polynomial gives hints
about the nature of the freezing. We also check the Higgs dimension formula by
comparing it with various existing conjectures for the CFTs one obtains by
torus compactifications down to four and three dimensions. Aided by our
results, we also extend those conjectures to compactifications of theories not
previously considered. These involve class S theories with twisted punctures in
four dimensions, and affine-Dynkin-shaped quivers in three dimensions.Comment: 39 pages, 1 figure; v2 published in JHE | Small instanton transitions for M5 fractions | small instanton transitions for m5 fractions | branes singularity conformal superconformal theories. moduli accessible lagrangian formulation. anomaly matching dimensions. fractions recombine ways leaving behind frozen versions singularity. anomaly hints freezing. check conjectures cfts obtains torus compactifications dimensions. aided extend conjectures compactifications considered. involve twisted punctures affine dynkin shaped quivers pages | non_dup | [] |
86414002 | 10.1007/JHEP10(2017)056 | In this paper, based on simple analytic techniques, we explore the
integrability conditions for classical stringy configurations defined over $
\eta $ as well as $ \lambda $- deformed backgrounds. We perform our analysis
considering classical string motions within various subsectors of the full
target space geometry. It turns out that classical string configurations
defined over $ \eta $- deformed backgrounds are non-integrable whereas on the
other hand, the corresponding configurations are integrable over the $ \lambda
$- deformed background. Our analysis therefore imposes a strong constraint on
the operator spectrum associated with the corresponding dual gauge theories at
strong coupling.Comment: Version to appear in JHE | Analytic integrability for strings on $ \eta $ and $ \lambda $ deformed
backgrounds | analytic integrability for strings on $ \eta $ and $ \lambda $ deformed backgrounds | analytic explore integrability stringy configurations lambda deformed backgrounds. motions subsectors geometry. turns configurations deformed backgrounds integrable configurations integrable lambda deformed background. imposes | non_dup | [] |
83867821 | 10.1007/JHEP10(2017)057 | We describe a notion of "higher" Wess-Zumino-Witten-like action which is
natural in the context of superstring field theories formulated in the large
Hilbert space. For the open string, the action is characterized by a pair of
commuting cyclic $A_\infty$ structures together with a hierarchy of higher-form
potentials analogous to the Maurer-Cartan elements which appear in the
conventional Wess-Zumino-Witten action. We apply this formalism to get a better
understanding of symmetries of open superstring field theory and the structure
of interactions in the Ramond sector, describing an interesting connection
between Ramond vertices and Feynman diagrams.Comment: v2: 63 pages, 4 figures. Minor corrections, references adde | Superstring Field Theory and the Wess-Zumino-Witten Action | superstring field theory and the wess-zumino-witten action | notion wess zumino witten superstring formulated hilbert space. commuting cyclic infty hierarchy potentials analogous maurer cartan wess zumino witten action. formalism symmetries superstring ramond describing connection ramond feynman pages figures. minor adde | non_dup | [] |
78511533 | 10.1007/JHEP10(2017)058 | Singular limits of 6D F-theory compactifications are often captured by
T-branes, namely a non-abelian configuration of intersecting 7-branes with a
nilpotent matrix of normal deformations. The long distance approximation of
such 7-branes is a Hitchin-like system in which simple and irregular poles
emerge at marked points of the geometry. When multiple matter fields localize
at the same point in the geometry, the associated Higgs field can exhibit
irregular behavior, namely poles of order greater than one. This provides a
geometric mechanism to engineer wild Higgs bundles. Physical constraints such
as anomaly cancellation and consistent coupling to gravity also limit the order
of such poles. Using this geometric formulation, we unify seemingly different
wild Hitchin systems in a single framework in which orders of poles become
adjustable parameters dictated by tuning gauge singlet moduli of the F-theory
model.Comment: v2: 65 pages, 6 figures, clarifications adde | T-Branes at the Limits of Geometry | t-branes at the limits of geometry | singular compactifications captured branes abelian intersecting branes nilpotent deformations. branes hitchin irregular poles emerge marked geometry. localize exhibit irregular poles one. geometric engineer bundles. anomaly cancellation poles. geometric formulation unify seemingly hitchin orders poles adjustable dictated tuning singlet moduli pages clarifications adde | non_dup | [] |
84093232 | 10.1007/JHEP10(2017)059 | It was recently pointed out that direct detection signals from at least three
different targets may be used to determine whether the Dark Matter (DM)
particle is different from its antiparticle. In this work, we examine in detail
the feasibility of this test under different conditions, motivated by proposals
for future detectors. Specifically, we perform likelihood fits to mock data
under the hypotheses that the DM particle is identical to or different from its
antiparticle, and determine the significance with which the former can be
rejected in favor of the latter. In our analysis, we consider 3 different
values of the DM mass ($50$ GeV, $300$ GeV, $1$ TeV) and 4 different
experimental ensembles, each consisting of at least 3 different targets -- Xe
and Ar plus one among the following: Si, Ge, $\mathrm{CaWO_4}$, or
Ge/$\mathrm{CaWO_4}$. For each of these experimental ensembles and each DM
mass, the expected discrimination significance is calculated as a function of
the DM-nucleon couplings. In the best case scenario, the discrimination
significance can reach $\mathcal{O}(3\sigma)$ for three of the four ensembles
considered, and $\mathcal{O}(5\sigma)$ for the ensemble including
$\mathrm{Si}$, highlighting the need for a variety of experimental targets in
order to determine the DM properties. These results show that future direct
detection signals could be used to exclude, at a statistically significant
level, a Majorana or a real DM particle, giving a critical clue about the
identity of the Dark Matter.Comment: 24 pages, 6 figures. Published in JHEP. Code for reproducing the
results of the paper is available at
https://github.com/bradkav/AntiparticleDM (doi:10.5281/zenodo.815457 | Prospects for determining the particle/antiparticle nature of WIMP dark
matter with direct detection experiments | prospects for determining the particle/antiparticle nature of wimp dark matter with direct detection experiments | pointed targets antiparticle. examine feasibility motivated proposals detectors. likelihood fits mock hypotheses antiparticle former rejected favor latter. ensembles consisting targets mathrm cawo mathrm cawo ensembles discrimination nucleon couplings. discrimination mathcal sigma ensembles mathcal sigma ensemble mathrm highlighting targets properties. exclude statistically majorana giving clue pages figures. jhep. reproducing zenodo. | non_dup | [] |
83851251 | 10.1007/JHEP10(2017)060 | We propose a new set of s-confining theories with product gauge groups and no
tree-level superpotential, based on a model with one antisymmetric matter field
and four flavors of quarks. For each product group we find a set of
gauge-invariant operators which satisfy the 't Hooft anomaly matching
conditions, and we identify the dynamically generated superpotential which
reproduces the classical constraints between operators. Several of these
product gauge theories confine without breaking chiral symmetry, even in cases
where the classical moduli space is quantum-modified. These results may be
useful for composite model building, particularly in cases where small meson
operators are absent, or for theories with multiple natural energy scales, and
may provide new ways to break supersymmetry dynamically.Comment: 28 pages, 8 tables, one appendi | Product Group S-Confinement in SUSY Gauge Theories | product group s-confinement in susy gauge theories | propose confining superpotential antisymmetric flavors quarks. satisfy hooft anomaly matching dynamically superpotential reproduces operators. confine breaking chiral moduli modified. composite meson absent ways break supersymmetry pages tables appendi | non_dup | [] |
84330133 | 10.1007/JHEP10(2017)062 | We present an action for chiral $N=(1,0)$ supergravity in $2+2$ dimensions.
The fields of the theory are organized into an $OSp(1|4)$ connection
supermatrix, and are given by the usual vierbein $V^a$, spin connection
$\omega^{ab}$, and Majorana gravitino $\psi$. In analogy with a construction
used for $D=10+2$ gauge supergravity, the action is given by $\int STr ({\bf
R}^2 {\bf \Gamma})$, where ${\bf R}$ is the $OSp(1|4)$ curvature supermatrix
two-form, and ${\bf \Gamma}$ a constant supermatrix containing $\gamma_5$. It
is similar, but not identical to the MacDowell-Mansouri action for $D=2+2$
supergravity. The constant supermatrix breaks $OSp(1|4)$ gauge invariance to a
subalgebra $OSp(1|2) \oplus Sp(2)$, including a Majorana-Weyl supercharge. Thus
half of the $OSp(1|4)$ gauge supersymmetry survives. The gauge fields are the
selfdual part of $\omega^{ab}$ and the Weyl projection of $\psi$ for
$OSp(1|2)$, and the antiselfdual part of $\omega^{ab}$ for $Sp(2)$.
Supersymmetry transformations, being part of a gauge superalgebra, close
off-shell. The selfduality condition on the spin connection can be consistently
imposed, and the resulting "projected" action is $OSp(1|2)$ gauge invariant.Comment: LaTeX, 10 page | Gauge supergravity in $D=2+2$ | gauge supergravity in $d=2+2$ | chiral supergravity dimensions. organized connection supermatrix usual vierbein connection omega majorana gravitino analogy supergravity gamma curvature supermatrix gamma supermatrix gamma macdowell mansouri supergravity. supermatrix breaks invariance subalgebra oplus majorana weyl supercharge. supersymmetry survives. selfdual omega weyl projection antiselfdual omega supersymmetry transformations superalgebra shell. selfduality connection consistently imposed projected latex | non_dup | [] |
74251871 | 10.1007/JHEP10(2017)063 | We analyze the mechanism of spontaneous symmetry breaking of scale invariance
in Galilean invariant field theories. We show that the existence of a dynamic
gapless dilaton mode depends on whether the $U(1)$ particle number or the
Galilean boost symmetry are spontaneously broken. When both scale and particle
number symmetries are spontaneously broken there is one propagating gapless
Nambu-Goldstone mode. Its dispersion relation is linear if the chemical
potential is nonzero and quadratic otherwise. We discuss the reversibility of
RG flows in such theories.Comment: 25 pages; revise | Spontaneous Breaking of Non-Relativistic Scale Symmetry | spontaneous breaking of non-relativistic scale symmetry | analyze spontaneous breaking invariance galilean theories. gapless dilaton galilean boost spontaneously broken. symmetries spontaneously broken propagating gapless nambu goldstone mode. nonzero quadratic otherwise. reversibility flows pages revise | non_dup | [] |
83865951 | 10.1007/JHEP10(2017)065 | We analyze scattering amplitudes with one soft external graviton and
arbitrary number of other finite energy external states carrying arbitrary mass
and spin to sub-subleading order in the momentum of the soft graviton. Our
result can be expressed as the sum of a universal part that depends only on the
amplitude without the soft graviton and not the other details of the theory and
a non-universal part that depends on the amplitude without the soft graviton,
and the two and three point functions of the theory. For tree amplitudes our
results are valid in all space-time dimensions while for loop amplitudes,
infrared divergences force us to restrict our analysis to space time dimensions
five or more. With this restriction the results are valid to all orders in
perturbation theory. Our results agree with known results in quantum field
theories and string theory.Comment: 52 pages, 7 figures v2: Proved that the non-universal sub-subleading
corrections depend only on on-shell 3-point function | Sub-subleading Soft Graviton Theorem in Generic Theories of Quantum
Gravity | sub-subleading soft graviton theorem in generic theories of quantum gravity | analyze amplitudes graviton carrying subleading graviton. universal graviton universal graviton theory. amplitudes valid amplitudes infrared divergences restrict more. restriction valid orders perturbation theory. agree pages proved universal subleading | non_dup | [] |
84330568 | 10.1007/JHEP10(2017)066 | We construct and study stationary, asymptotically flat multicenter solutions
describing regular black holes with non-Abelian hair (colored magnetic-monopole
and dyon fields) in two models of $\mathcal{N}=2,d=4$ Super-Einstein-Yang-Mills
theories: the quadratic model $\overline{\mathbb{CP}}^{3}$ and the cubic model
ST$[2,6]$, which can be embedded in 10-dimensional Heterotic Supergravity.
These solutions are based on the multicenter dyon recently discovered by one of
us, which solves the SU$(2)$ Bogomol'nyi and dyon equations on
$\mathbb{E}^{3}$. In contrast to the well-known Abelian multicenter solutions,
the relative positions of the non-Abelian black hole centers are unconstrained.
We study necessary conditions on the parameters of the solutions that ensure
the regularity of the metric. In the case of the $\overline{\mathbb{CP}}^{3}$
model we show that it is enough to require the positivity of the "masses" of
the individual black holes, the finiteness of each of their entropies and their
superadditivity. In the case of the $ST[2,6]$ model we have not been able to
show that analogous conditions are sufficient, but we give an explicit example
of a regular solution describing thousands of non-Abelian dyonic black holes in
equilibrium at arbitrary relative positions.
We also construct non-Abelian solutions that interpolate smoothly between
just two aDS$_{2}\times$S$^{2}$ vacua with different radii (dumbbell
solutions).Comment: 43 pages, 2 figure | Dyonic black holes at arbitrary locations | dyonic black holes at arbitrary locations | stationary asymptotically multicenter describing holes abelian hair colored monopole dyon mathcal super einstein mills quadratic overline mathbb cubic embedded heterotic supergravity. multicenter dyon discovered solves bogomol dyon mathbb abelian multicenter abelian centers unconstrained. ensure regularity metric. overline mathbb positivity holes finiteness entropies superadditivity. analogous describing thousands abelian dyonic holes positions. abelian interpolate smoothly vacua radii dumbbell .comment pages | non_dup | [] |
86419197 | 10.1007/JHEP10(2017)067 | We present virtual contributions up to two loop level in perturbative Quantum
Chromodynamic (QCD) to the decay of pseudo-scalar Higgs boson ($A$) to three
gluons ($g$) and also to quark ($q$), anti-quark ($\overline q$) and a gluon.
With appropriate crossing, they are well suited for predicting the differential
distribution of $A$ in association with a jet in hadron colliders up to
next-to-next-to-leading order (NNLO) in strong coupling constant and also for
the subsequent decay of $A$ to hadrons. We use effective field theory approach
to integrate out the top quarks in the heavy top limit. The resulting theory
involves two pseudo-scalar composite operators describing the interaction of
$A$ with gluons as well as with quark and anti-quark. We perform our
computation in dimensional regularisation and use minimal subtraction
($\overline{MS}$) scheme to renormalise strong coupling constant as well as the
composite operators. The ultraviolet (UV) finite amplitudes contain infrared
(IR) divergences that are found to be in agreement with the predictions by
Catani. For both the amplitudes namely $A \rightarrow g g g$ and $A \rightarrow
q \overline q g$, the leading transcendental terms at one and two loops are
found to be identical to those in a three point form factor (FF) of the
half-BPS operator in ${\cal N}=4$ Supersymmetric Yang Mills (SYM) theory when
the QCD color factors are adjusted in a specific way. We present our results in
terms of harmonic polylogs well suited for further numerical study.Comment: 29 page | Two loop QCD corrections for the process Pseudo-scalar Higgs
$\rightarrow 3$ partons | two loop qcd corrections for the process pseudo-scalar higgs $\rightarrow 3$ partons | virtual perturbative chromodynamic pseudo boson gluons overline gluon. crossing suited predicting hadron colliders nnlo hadrons. integrate quarks limit. involves pseudo composite describing gluons quark. regularisation subtraction overline renormalise composite operators. ultraviolet amplitudes infrared divergences catani. amplitudes rightarrow rightarrow overline transcendental loops supersymmetric mills adjusted way. harmonic polylogs suited | non_dup | [] |
83864734 | 10.1007/JHEP10(2017)069 | The notion of a holographic entropy cone has recently been introduced and it
has been proven that this cone is polyhedral. However, the original definition
was fully geometric and did not strictly require a holographic duality. We
introduce a new definition of the cone, insisting that the geometries used for
its construction should be dual to states of a CFT. As a result, the
polyhedrality of this holographic cone does not immediately follow. A numerical
evaluation of the Euclidean action for the geometries that realize extremal
rays of the original cone indicates that these are subdominant bulk phases of
natural path integrals. The result challenges the expectation that such
geometries are in fact dual to CFT states.Comment: 20 pages, 7 figures, minor change, added ref, published versio | Handlebody phases and the polyhedrality of the holographic entropy cone | handlebody phases and the polyhedrality of the holographic entropy cone | notion holographic cone proven cone polyhedral. geometric strictly holographic duality. cone insisting geometries cft. polyhedrality holographic cone immediately follow. euclidean geometries realize extremal rays cone subdominant integrals. challenges expectation geometries pages minor versio | non_dup | [] |
84332967 | 10.1007/JHEP10(2017)070 | We revisit the subject of one-loop determinants in AdS$_3$ gravity via the
quasinormal mode method. Our goal is to evaluate a one-loop determinant with
chiral boundary conditions for the metric field; chirality is achieved by
imposing Dirichlet boundary conditions on certain components while others
satisfy Neumann. Along the way, we give a generalization of the quasinormal
mode method for stationary (non-static) thermal backgrounds, and propose a
treatment for Neumann boundary conditions in this framework. We evaluate the
graviton one-loop determinant on the Euclidean BTZ background with
parity-violating boundary conditions (CSS), and find excellent agreement with
the dual warped CFT. We also discuss a more general falloff in AdS$_3$ that is
related to two dimensional quantum gravity in lightcone gauge. The behavior of
the ghost fields under both sets of boundary conditions is novel and we discuss
potential interpretations.Comment: 36+18 page | Tweaking one-loop determinants in AdS$_3$ | tweaking one-loop determinants in ads$_3$ | revisit determinants quasinormal method. goal determinant chiral chirality imposing dirichlet satisfy neumann. generalization quasinormal stationary backgrounds propose neumann framework. graviton determinant euclidean parity violating excellent warped cft. falloff lightcone gauge. ghost | non_dup | [] |
86416227 | 10.1007/JHEP10(2017)074 | The connection between entanglement and topology manifests itself in the form
of the ER-EPR duality. This statement however refers to the maximally entangled
states only. In this article I study the multipartite entanglement and the way
in which it relates to the topological interpretation of the ER-EPR duality.
The $2$ dimensional genus $1$ torus will be generalised to a $n$-dimensional
general torus, where the information about the multipartite entanglement will
be encoded in the higher inclusion maps of the Mayer-Vietorist sequence.Comment: 2 figure | Multipartite entanglement via the Mayer-Vietoris theorem | multipartite entanglement via the mayer-vietoris theorem | connection entanglement topology manifests duality. statement refers maximally entangled only. multipartite entanglement relates topological duality. genus torus generalised torus multipartite entanglement encoded inclusion mayer vietorist | non_dup | [] |
93944888 | 10.1007/JHEP10(2017)075 | We show how all possible one-particle reducible tadpole diagrams in constant
electromagnetic fields can be constructed from one-particle irreducible
constant-field diagrams. The construction procedure is essentially algebraic
and involves differentiations of the latter class of diagrams with respect to
the field strength tensor and contractions with derivatives of the one-particle
irreducible part of the Heisenberg-Euler effective Lagrangian in constant
fields. Specific examples include the two-loop addendum to the Heisenberg-Euler
effective action as well as a novel one-loop correction to the charged particle
propagator in constant electromagnetic fields discovered recently. As an
additional example, the approach devised in the present article is adopted to
derive the tadpole contribution to the two-loop photon polarization tensor in
constant fields for the first time.Comment: 15 pages, 3 figures; some clarifications added, matches journal
versio | Tadpole diagrams in constant electromagnetic fields | tadpole diagrams in constant electromagnetic fields | reducible tadpole diagrams electromagnetic irreducible diagrams. essentially algebraic involves differentiations diagrams contractions derivatives irreducible heisenberg euler lagrangian fields. addendum heisenberg euler propagator electromagnetic discovered recently. devised adopted derive tadpole pages clarifications matches versio | non_dup | [] |
93939121 | 10.1007/JHEP10(2017)077 | In this work we systematically enumerate genus one fibrations in the class of
7,890 Calabi-Yau manifolds defined as complete intersections in products of
projective spaces, the so-called CICY threefolds. This survey is independent of
the description of the manifolds and improves upon past approaches that probed
only a particular algebraic form of the threefolds (i.e. searches for "obvious"
genus one fibrations as in [1,2]). We also study K3-fibrations and nested
fibration structures. That is, K3 fibrations with potentially many distinct
elliptic fibrations. To accomplish this survey a number of new geometric tools
are developed including a determination of the full topology of all CICY
threefolds, including triple intersection numbers. In 2,946 cases this involves
finding a new "favorable" description of the manifold in which all divisors
descend from a simple ambient space. Our results consist of a survey of obvious
fibrations for all CICY threefolds and a complete classification of all genus
one fibrations for 4,957 "Kahler favorable" CICYs whose Kahler cones descend
from a simple ambient space. Within the CICY dataset, we find 139,597 obvious
genus one fibrations, 30,974 obvious K3 fibrations and 208,987 nested
combinations. For the Kahler favorable geometries we find a complete
classification of 377,559 genus one fibrations. For one manifold with Hodge
numbers (19,19) we find an explicit description of an infinite number of
distinct genus-one fibrations extending previous results for this particular
geometry that have appeared in the literature. The data associated to this scan
is available at http://www1.phys.vt.edu/cicydata .Comment: 54 pages, 4 tables, 4 figure | Fibrations in CICY Threefolds | fibrations in cicy threefolds | systematically enumerate genus fibrations calabi manifolds intersections projective cicy threefolds. manifolds improves probed algebraic threefolds i.e. searches obvious genus fibrations fibrations nested fibration structures. fibrations potentially elliptic fibrations. accomplish geometric topology cicy threefolds triple intersection numbers. involves favorable manifold divisors descend ambient space. consist obvious fibrations cicy threefolds genus fibrations kahler favorable cicys kahler cones descend ambient space. cicy dataset obvious genus fibrations obvious fibrations nested combinations. kahler favorable geometries genus fibrations. manifold hodge infinite genus fibrations extending appeared literature. scan .comment pages tables | non_dup | [] |
83867768 | 10.1007/JHEP10(2017)078 | We clarify three aspects of non-compact elliptic genera. Firstly, we give a
path integral derivation of the elliptic genus of the cigar conformal field
theory from its non-linear sigma-model description. The result is a manifestly
modular sum over a lattice. Secondly, we discuss supersymmetric quantum
mechanics with a continuous spectrum. We regulate the theory and analyze the
dependence on the temperature of the trace weighted by the fermion number. The
dependence is dictated by the regulator. From a detailed analysis of the
dependence on the infrared boundary conditions, we argue that in non-compact
elliptic genera right-moving supersymmetry combined with modular covariance is
anomalous. Thirdly, we further clarify the relation between the flat space
elliptic genus and the infinite level limit of the cigar elliptic genus.Comment: 22 page | An Elliptic Triptych | an elliptic triptych | clarify elliptic genera. firstly derivation elliptic genus cigar conformal sigma description. manifestly modular lattice. secondly supersymmetric mechanics spectrum. regulate analyze trace weighted fermion number. dictated regulator. infrared argue elliptic genera moving supersymmetry modular covariance anomalous. thirdly clarify elliptic genus infinite cigar elliptic | non_dup | [] |
86421694 | 10.1007/JHEP10(2017)079 | We consider antiparallel Wilson lines in N=4 super Yang-Mills in the presence
of a codimension-1 defect. We compute the Wilson lines' expectation value both
at weak coupling, in the gauge theory, and at strong coupling, by finding the
string configurations which are dual to this operator. These configurations
display a Gross-Ooguri transition between a connected, U-shaped string phase
and a phase in which the string breaks into two disconnected surfaces. We
analyze in detail the critical configurations separating the two phases and
compare the string result with the gauge theory one in a certain double scaling
limit.Comment: 25 pages, 5 figures; v2: minor changes, references added, published
version; v3: clarifications in Sec. | Quark-antiquark potential in defect conformal field theory | quark-antiquark potential in defect conformal field theory | antiparallel wilson super mills codimension defect. wilson expectation configurations operator. configurations display gross ooguri shaped breaks disconnected surfaces. analyze configurations separating pages minor clarifications sec. | non_dup | [] |
74203868 | 10.1007/JHEP10(2017)080 | We discuss bosonization and Fermionic Short-Range-Entangled (FSRE) phases of
matter in one, two, and three spatial dimensions, emphasizing the physical
meaning of the cohomological parameters which label such phases and the
connection with higher-form symmetries. We propose a classification scheme for
fermionic SPT phases in three spatial dimensions with an arbitrary finite point
symmetry G. It generalizes the supercohomology of Gu and Wen. We argue that the
most general such phase can be obtained from a bosonic "shadow" by condensing
both fermionic particles and strings.Comment: 47 page | Fermionic SPT phases in higher dimensions and bosonization | fermionic spt phases in higher dimensions and bosonization | bosonization fermionic entangled fsre emphasizing meaning cohomological label connection symmetries. propose fermionic generalizes supercohomology wen. argue bosonic shadow condensing fermionic | non_dup | [] |
83834488 | 10.1007/JHEP10(2017)081 | We would like to put the area law -- believed to by obeyed by entanglement
entropies in the ground state of a local field theory -- to scrutiny in the
presence of non-perturbative effects. We study instanton corrections to
entanglement entropy in various models whose instanton effects are well
understood, including $U(1)$ gauge theory in 2+1 dimensions and false vacuum
decay in $\phi^4$ theory, and we demonstrate that the area law is indeed obeyed
in these models. We also perform numerical computations for toy wavefunctions
mimicking the theta vacuum of the (1+1)-dimensional Schwinger model. Our
results indicate that such superpositions exhibit no more violation of the area
law than the logarithmic behavior of a single Fermi surface.Comment: 29 pages, 4 figures, typos corrected, substantially revised,
published versio | Instantons and Entanglement Entropy | instantons and entanglement entropy | believed obeyed entanglement entropies scrutiny perturbative effects. instanton entanglement instanton understood false obeyed models. computations wavefunctions mimicking theta schwinger model. superpositions exhibit violation logarithmic fermi pages typos corrected substantially revised versio | non_dup | [] |
42681000 | 10.1007/JHEP10(2017)083 | A large number of examples of compact $G_2$ manifolds, relevant to
supersymmetric compactifications of M-Theory to four dimensions, can be
constructed by forming a twisted connected sum of two appropriate building
blocks times a circle. These building blocks, which are appropriate $K3$-fibred
threefolds, are shown to have a natural and elegant construction in terms of
tops, which parallels the construction of Calabi-Yau manifolds via reflexive
polytopes.Comment: 43 pages, v2: typos corrected, improved discussion, references added,
v3: reorganized and improved parts of the discussion, fixed typo | Tops as Building Blocks for G2 Manifolds | tops as building blocks for g2 manifolds | manifolds supersymmetric compactifications forming twisted blocks circle. blocks fibred threefolds elegant tops parallels calabi manifolds reflexive pages typos corrected reorganized typo | non_dup | [] |
86417115 | 10.1007/JHEP10(2017)084 | We compute free energies as well as conformal anomalies associated with
boundaries for a conformal free scalar field. To that matter, we introduce the
family of spaces of the form $\mathbb{S}^a\times \mathbb{H}^b$, which are
conformally related to $\mathbb{S}^{a+b}$. For the case of $a=1$, related to
the entanglement entropy across $\mathbb{S}^{b-1}$, we provide some new
explicit computations of entanglement entropies at weak coupling. We then
compute the free energy for spaces $\mathbb{S}^a\times \mathbb{H}^b$ for
different values of $a$ and $b$. For spaces $\mathbb{S}^{2n+1}\times
\mathbb{H}^{2k}$ we find an exact match with the free energy on
$\mathbb{S}^{2n+2k+1}$. For $\mathbb{H}^{2k+1}$ and $\mathbb{S}^{3}\times
\mathbb{H}^{3}$ we find conformal anomalies originating from boundary terms.
We also compute the free energy for strongly coupled theories through
holography, obtaining similar results.Comment: 36 pages, no figures. V2: refs. adde | Free energy and boundary anomalies on $\mathbb{S}^a\times \mathbb{H}^b$
spaces | free energy and boundary anomalies on $\mathbb{s}^a\times \mathbb{h}^b$ spaces | conformal anomalies boundaries conformal field. mathbb mathbb conformally mathbb entanglement mathbb computations entanglement entropies coupling. mathbb mathbb mathbb mathbb match mathbb mathbb mathbb mathbb conformal anomalies originating terms. holography obtaining pages figures. refs. adde | non_dup | [] |
86413523 | 10.1007/JHEP10(2017)086 | Double field theory yields a formulation of the low-energy effective action
of bosonic string theory and half-maximal supergravities that is covariant
under the T-duality group O$(d,d)$ emerging on a torus $T^d$. Upon reduction to
three spacetime dimensions and dualisation of vector fields into scalars, the
symmetry group is enhanced to O$(d+1,d+1)$. We construct an enhanced double
field theory with internal coordinates in the adjoint representation of
O$(d+1,d+1)$. Its section constraints admit two inequivalent solutions,
encoding in particular the embedding of $D=6$ chiral and non-chiral theories,
respectively. As an application we define consistent generalized Scherk-Schwarz
reductions using a novel notion of generalized parallelization. This allows us
to prove the consistency of the truncations of $D=6$, ${\cal N}=(1,1)$ and
$D=6$, ${\cal N}=(2,0)$ supergravity on AdS$_3\times \mathbb{S}^3$.Comment: 33 pages plus Appendi | O(d+1,d+1) enhanced double field theory | o(d+1,d+1) enhanced double field theory | formulation bosonic maximal supergravities covariant duality emerging torus spacetime dualisation scalars adjoint admit inequivalent encoding embedding chiral chiral respectively. scherk schwarz reductions notion parallelization. consistency truncations supergravity mathbb .comment pages appendi | non_dup | [] |