core_id
stringlengths 4
9
| doi
stringlengths 10
80
| original_abstract
stringlengths 500
21.8k
| original_title
stringlengths 20
441
| processed_title
stringlengths 20
441
| processed_abstract
stringlengths 34
13.6k
| cat
stringclasses 3
values | labelled_duplicates
sequence |
|---|---|---|---|---|---|---|---|
29561372 | 10.1007/JHEP12(2015)075 | Superstring perturbation theory based on the 1PI effective theory approach
has been useful for addressing the problem of mass renormalization and vacuum
shift. We derive Ward identities associated with space-time supersymmetry
transformation in this approach. This leads to a proof of the equality of
renormalized masses of bosons and fermions and identities relating fermionic
amplitudes to bosonic amplitudes after taking into account the effect of mass
renormalization. This also relates unbroken supersymmetry to a given order in
perturbation theory to absence of tadpoles of massless scalars to higher order.
The results are valid at the perturbative vacuum as well as in the shifted
vacuum when the latter describes the correct ground state of the theory. We
apply this to SO(32) heterotic string theory on Calabi-Yau 3-folds where a one
loop Fayet-Iliopoulos term apparently breaks supersymmetry at one loop, but
analysis of the low energy effective field theory indicates that there is a
nearby vacuum where supersymmetry is restored. We explicitly prove that the
perturbative amplitudes of this theory around the shifted vacuum indeed satisfy
the Ward identities associated with unbroken supersymmetry. We also test the
general arguments by explicitly verifying the equality of bosonic and fermionic
masses at one loop order in the shifted vacuum, and the appearance of two loop
dilaton tadpole in the perturbative vacuum where supersymmetry is expected to
be broken.Comment: LaTeX file, 111 pages; v2: corrected eqs.(3.6)-(3.9) and
(3.11)-(3.15), added referenc | Supersymmetry Restoration in Superstring Perturbation Theory | supersymmetry restoration in superstring perturbation theory | superstring perturbation addressing renormalization shift. derive ward identities supersymmetry approach. equality renormalized bosons fermions identities relating fermionic amplitudes bosonic amplitudes renormalization. relates unbroken supersymmetry perturbation tadpoles massless scalars order. valid perturbative shifted describes theory. heterotic calabi folds fayet iliopoulos apparently breaks supersymmetry nearby supersymmetry restored. explicitly perturbative amplitudes shifted satisfy ward identities unbroken supersymmetry. arguments explicitly verifying equality bosonic fermionic shifted appearance dilaton tadpole perturbative supersymmetry latex file pages corrected eqs. referenc | non_dup | [] |
29561385 | 10.1007/JHEP12(2015)076 | Non-equilibrium black hole horizons are considered in scaling theories with
generic Lifshitz invariance and an unbroken U(1) symmetry. There is also
charge-hyperscaling violation associated with a non-trivial conduction
exponent. The boundary stress tensor is computed and renormalized and the
associated hydrodynamic equations derived. Upon a non-trivial redefinition of
boundary sources associated with the U(1) gauge field, the equations are mapped
to the standard non-relativistic hydrodynamics equations coupled to a mass
current and an external Newton potential in accordance with the general theory
of [arXiv:1502.00228]. The shear viscosity to entropy ratio is the same as in
the relativistic case.Comment: 44 pages, v2: minor improvements and a list of definitions added, 48
pages, v3: Published version, many minor misprints corrected, 57 page | Charge-Hyperscaling Violating Lifshitz hydrodynamics from black-holes | charge-hyperscaling violating lifshitz hydrodynamics from black-holes | horizons generic lifshitz invariance unbroken symmetry. hyperscaling violation trivial conduction exponent. renormalized hydrodynamic derived. trivial redefinition mapped relativistic hydrodynamics newton accordance viscosity relativistic pages minor improvements definitions pages minor misprints corrected | non_dup | [] |
29563878 | 10.1007/JHEP12(2015)077 | We present a unified framework for the holographic computation of Virasoro
conformal blocks at large central charge. In particular, we provide bulk
constructions that correctly reproduce all semiclassical Virasoro blocks that
are known explicitly from conformal field theory computations. The results
revolve around the use of geodesic Witten diagrams, recently introduced in
arXiv:1508.00501, evaluated in locally AdS$_3$ geometries generated by
backreaction of heavy operators. We also provide an alternative computation of
the heavy-light semiclassical block -- in which two external operators become
parametrically heavy -- as a certain scattering process involving higher spin
gauge fields in AdS$_3$; this approach highlights the chiral nature of Virasoro
blocks. These techniques may be systematically extended to compute corrections
to these blocks and to interpolate amongst the different semiclassical regimes.Comment: 32 pages + refs. v2: fixed figure glitc | Semiclassical Virasoro Blocks from AdS$_3$ Gravity | semiclassical virasoro blocks from ads$_3$ gravity | unified holographic virasoro conformal blocks charge. constructions correctly reproduce semiclassical virasoro blocks explicitly conformal computations. revolve geodesic witten diagrams locally geometries backreaction operators. semiclassical parametrically involving highlights chiral virasoro blocks. systematically blocks interpolate amongst semiclassical pages refs. glitc | non_dup | [] |
52671094 | 10.1007/JHEP12(2015)078 | International audienceThe equations of motion of toroidal orientifold compactifications with fluxes are in one-to-one correspondence with gauged supergravity if the orientifold (and D-brane) sources are smeared over the compact space. This smeared limit is identical to the approximation that ignores warping. It is therefore relevant to compare quantities obtained from the gauged supergravity with the true 10d solution with localised sources. In this paper we find the correspondence between BPS domain walls in gauged SUGRA and 10D SUGRA with localised sources. Our model is the simplest orientifold with fluxes we are aware of: an O6/D6 compactification on T 3 /Z 2 in massive IIA with H 3-flux. The BPS domain walls correspond to a O6/D6/NS5/D8 bound state. Our analysis reveals that the domain wall energy computed in gauged SUGRA is unaffected by the localisation of the O6/D6 sources | Domain walls inside localised orientifolds | domain walls inside localised orientifolds | audiencethe toroidal orientifold compactifications fluxes correspondence gauged supergravity orientifold brane smeared space. smeared ignores warping. quantities gauged supergravity localised sources. correspondence walls gauged sugra sugra localised sources. simplest orientifold fluxes aware compactification massive flux. walls state. reveals gauged sugra unaffected localisation | non_dup | [] |
29531697 | 10.1007/JHEP12(2015)079 | We construct a class of 3-point constants in the $sl(4)$ Toda conformal
theory $W_4$, extending the examples in Fateev and Litvinov. Their knowledge
allows to determine the braiding/fusing matrix transforming 4-point conformal
blocks of one fundamental, labelled by the 6-dimensional $sl(4)$
representation, and three partially degenerate vertex operators. It is a $3
\times 3$ submatrix of the generic $6 \times 6$ fusing matrix consistent with
the fusion rules for the particular class of representations. We check a
braiding relation which has wider applications to conformal models with $sl(4)$
symmetry. The 3-point constants in dual regions of central charge are compared
in preparation for a BPS like relation in the $\hat{sl}(4)$ WZW model.Comment: 27 pages, TeX with harvmac; v2: Content substantially extended, new
references adde | On some 3-point functions in the $W_4$ CFT and related braiding matrix | on some 3-point functions in the $w_4$ cft and related braiding matrix | toda conformal extending fateev litvinov. braiding fusing transforming conformal blocks labelled partially degenerate operators. submatrix generic fusing fusion representations. check braiding wider conformal symmetry. preparation pages harvmac substantially adde | non_dup | [] |
29554530 | 10.1007/JHEP12(2015)081 | We revisit the applications of integral geometry in AdS$_3$ and argue that
the metric of the kinematic space can be realized as the entanglement contour,
which is defined as the additive entanglement density. From the renormalization
of the entanglement contour, we can holographically understand the operations
of disentangler and isometry in multi-scale entanglement renormalization
ansatz. Furthermore, a renormalization group equation of the long-distance
entanglement contour is then derived. We then generalize this integral
geometric construction to higher dimensions and in particular demonstrate how
it works in bulk space of homogeneity and isotropy.Comment: 40 pages, 7 figures. v2: discussions on the general measure added,
typos fixed; v3: sections reorganized, various points clarified, to appear in
JHE | Entanglement renormalization and integral geometry | entanglement renormalization and integral geometry | revisit argue kinematic realized entanglement contour additive entanglement density. renormalization entanglement contour holographically operations disentangler isometry entanglement renormalization ansatz. renormalization entanglement contour derived. generalize geometric homogeneity pages figures. discussions typos reorganized clarified | non_dup | [] |
42650495 | 10.1007/JHEP12(2015)082 | We study corner contributions to holographic mutual information for
entangling regions composed of a set of disjoint sectors of a single infinite
circle in three-dimensional conformal field theories. In spite of the UV
divergence of holographic mutual information, it exhibits a first order phase
transition. We show that tripartite information is also divergent for disjoint
sectors, which is in contrast with the well-known feature of tripartite
information being finite even when entangling regions share boundaries. We also
verify the locality of corner effects by studying mutual information between
regions separated by a sharp annular region. Possible extensions to higher
dimensions and hyperscaling violating geometries is also considered for
disjoint sectors.Comment: 35 pages, 25 Figures, v2: presentation improved, v3: matches
published version in JHE | Holographic Mutual Information for Singular Surfaces | holographic mutual information for singular surfaces | corner holographic mutual entangling composed disjoint sectors infinite circle conformal theories. spite divergence holographic mutual exhibits transition. tripartite divergent disjoint sectors tripartite entangling share boundaries. verify locality corner studying mutual separated sharp annular region. extensions hyperscaling violating geometries disjoint pages presentation matches | non_dup | [] |
29552684 | 10.1007/JHEP12(2015)083 | The AdS/CFT correspondence relates Wilson loops in N=4 SYM theory to minimal
area surfaces in AdS5xS5 space. If the Wilson loop is Euclidean and confined to
a plane (t,x) then the dual surface is Euclidean and lives in Minkowski AdS3.
In this paper we study such minimal area surfaces generalizing previous results
obtained in the Euclidean case. Since the surfaces we consider have the
topology of a disk, the holonomy of the flat current vanishes which is
equivalent to the condition that a certain boundary Schroedinger equation has
all its solutions anti-periodic. If the potential for that Schroedinger
equation is found then reconstructing the surface and finding the area become
simpler. In particular we write a formula for the Area in terms of the
Schwarzian derivative of the contour. Finally an infinite parameter family of
analytical solutions using Riemann Theta functions is described. In this case,
both the area and the shape of the surface are given analytically and used to
check the previous results.Comment: 45 pages, 4 figures, LaTe | Euclidean Wilson loops and Minimal Area Surfaces in Minkowski AdS3 | euclidean wilson loops and minimal area surfaces in minkowski ads3 | correspondence relates wilson loops space. wilson euclidean confined euclidean lives minkowski generalizing euclidean case. topology holonomy vanishes schroedinger periodic. schroedinger reconstructing simpler. schwarzian contour. infinite riemann theta described. analytically check pages | non_dup | [] |
29563934 | 10.1007/JHEP12(2015)084 | Spin-2 fields are often candidates in physics beyond the Standard Model
namely the models with extra-dimensions where spin-2 Kaluza-Klein gravitons
couple to the fields of the SM. Also, in the context of Higgs searches, spin-2
fields have been studied as an alternative to the scalar Higgs boson. In this
article, we present the complete three loop QCD radiative corrections to the
spin-2 quark-antiquark and spin-2 gluon-gluon form factors in SU(N) gauge
theory with $n_f$ light flavors. These form factors contribute to both
quark-antiquark and gluon-gluon initiated processes involving spin-2 particle
in the hadronic reactions at the LHC. We have studied the structure of infrared
singularities in these form factors up to three loop level using Sudakov
integro-differential equation and found that the anomalous dimensions
originating from soft and collinear regions of the loop integrals coincide with
those of the electroweak vector boson and Higgs form factors confirming the
universality of the infrared singularities in QCD amplitudes.Comment: 20 pages, 2 figure | Spin-2 Form Factors at Three Loop in QCD | spin-2 form factors at three loop in qcd | candidates extra kaluza klein gravitons couple searches boson. radiative antiquark gluon gluon flavors. antiquark gluon gluon initiated involving hadronic lhc. infrared singularities sudakov integro anomalous originating collinear integrals coincide electroweak boson confirming universality infrared singularities pages | non_dup | [] |
42639712 | 10.1007/JHEP12(2015)085 | We revisit the issue of higher-dimensional counterterms for the N=(1,1)
supersymmetric Yang-Mills (SYM) theory in six dimensions using the off-shell
N=(1,0) and on-shell N=(1,1) harmonic superspace approaches. The second
approach is developed in full generality and used to solve, for the first time,
the N=(1,1) SYM constraints in terms of N=(1,0) superfields. This provides a
convenient tool to write explicit expressions for the candidate counterterms
and other N=(1,1) invariants and may be conducive to proving
non-renormalization theorems needed to explain the absence of certain
logarithmic divergences in higher-loop contributions to scattering amplitudes
in N=(1,1) SYM.Comment: 55 pages, published version in JHE | Ultraviolet behavior of 6D supersymmetric Yang-Mills theories and
harmonic superspace | ultraviolet behavior of 6d supersymmetric yang-mills theories and harmonic superspace | revisit counterterms supersymmetric mills harmonic superspace approaches. generality solve superfields. convenient expressions candidate counterterms invariants conducive proving renormalization theorems logarithmic divergences amplitudes pages | non_dup | [] |
29556207 | 10.1007/JHEP12(2015)086 | We show that for a class of two-loop diagrams, the on-shell part of the
integration-by-parts (IBP) relations correspond to exact meromorphic one-forms
on algebraic curves. Since it is easy to find such exact meromorphic one-forms
from algebraic geometry, this idea provides a new highly efficient algorithm
for integral reduction. We demonstrate the power of this method via several
complicated two-loop diagrams with internal massive legs. No explicit elliptic
or hyperelliptic integral computation is needed for our method.Comment: minor changes: more references adde | Two-loop Integral Reduction from Elliptic and Hyperelliptic Curves | two-loop integral reduction from elliptic and hyperelliptic curves | diagrams meromorphic algebraic curves. meromorphic algebraic reduction. complicated diagrams massive legs. elliptic hyperelliptic minor adde | non_dup | [] |
29561878 | 10.1007/JHEP12(2015)088 | We present the general flux tube integrand for MHV and non-MHV amplitudes, in
planar N = 4 SYM theory, up to a group theoretical rational factor. We find
that the MHV and non-MHV cases only differ by simple form factors which we
derive. This information allows us to run the operator product expansion
program for all sorts of non-MHV amplitudes and to test the recently proposed
map with the so called charged pentagons transitions. Perfect agreement is
found, on a large sample of non-MHV amplitudes, with the perturbative data
available in the literature.Comment: 42 pages. v2 : minor correction to Section 2.3, typos correcte | OPE for all Helicity Amplitudes II. Form Factors and Data Analysis | ope for all helicity amplitudes ii. form factors and data analysis | tube integrand amplitudes planar rational factor. derive. sorts amplitudes pentagons transitions. perfect amplitudes perturbative pages. minor typos correcte | non_dup | [] |
29563705 | 10.1007/JHEP12(2015)089 | We classify the complete set of dimension-5 operators relevant for the
resonant production of a singlet of spin 0 or 2 linearly coupled to the
Standard Model (SM). We compute the decay width of such states as a function of
the effective couplings, and provide the matching to various well-motivated New
Physics scenarios. We then investigate the possibility that one of these
neutral resonances be at the origin of the excess in diboson production
recently reported by the ATLAS collaboration. We perform a shape analysis of
the excess under full consideration of the systematic uncertainties to extract
the width $\Gamma_{\rm tot}$ of the hypothetical resonance, finding it to be in
the range 26 GeV $<\Gamma_{\rm tot}<$ 144 GeV at 95\% C.L. We then point out
that the three overlapping selections $WW$, $WZ$, $ZZ$ reported by ATLAS follow
a joint trivariate Poisson distribution, which opens the possibility of a
thorough likelihood analysis of the event rates. The background systematic
uncertainties are also included in our analysis. We show that the data do not
require $W\!Z$ production and could thus in principle be explained by neutral
resonances. We then use both the information on the width and the cross
section, which prove to be highly complementary, to test the effective
Lagrangians of singlet resonances. Regarding specific models, we find that
neither scalars coupled via the Higgs-portal nor the Randall-Sundrum (RS)
radion can explain the ATLAS anomaly. The RS graviton with all matter on the
infrared (IR) brane can in principle fit the observed excess, while the RS
model with matter propagating in the bulk requires the presence of IR brane
kinetic terms for the gauge fields.Comment: 31 page | Effective theory for neutral resonances and a statistical dissection of
the ATLAS diboson excess | effective theory for neutral resonances and a statistical dissection of the atlas diboson excess | classify resonant singlet linearly couplings matching motivated scenarios. neutral resonances excess diboson atlas collaboration. excess consideration extract gamma hypothetical gamma c.l. overlapping selections atlas trivariate poisson opens thorough likelihood rates. analysis. neutral resonances. complementary lagrangians singlet resonances. neither scalars portal randall sundrum radion atlas anomaly. graviton infrared brane excess propagating brane | non_dup | [] |
42644830 | 10.1007/JHEP12(2015)090 | In this work, we calculate leading-order anomalous dimension matrices for
dimension-6 four-quark operators which appear in the operator product expansion
of flavour non-diagonal and diagonal vector and axial-vector two-point
correlation functions. The infrared renormalon structure corresponding to
four-quark operators is reviewed and it is investigated how the eigenvalues of
the anomalous dimension matrices influence the singular behaviour of the $u=3$
infrared renormalon pole. It is found that compared to the large-$\beta_0$
approximation where at most quadratic poles are present, in full QCD at $N_f=3$
the most singular pole is more than cubic with an exponent $\kappa\approx 3.2$.Comment: 19 pages, 1 figure; version to appear in JHE | Anomalous dimensions of four-quark operators and renormalon structure of
mesonic two-point correlators | anomalous dimensions of four-quark operators and renormalon structure of mesonic two-point correlators | anomalous flavour diagonal diagonal axial functions. infrared renormalon reviewed eigenvalues anomalous singular infrared renormalon pole. beta quadratic poles singular pole cubic exponent kappa approx .comment pages | non_dup | [] |
29563387 | 10.1007/JHEP12(2015)093 | We obtain the action for a curved superconformal abelian M5 brane with the
background R-symmetry gauge field turned on. We then restrict ourselves to
superconformal M5 brane on a sphere times flat Minkowski space. We choose
R-symmetry SO(1,4) instead of SO(5), which enables us to partially twist on
Minkowski space and replace it by some curved Lorentzian manifold. We obtain M5
brane actions on $M_{1,1} \times S^4$ and $M_{1,2} \times S^3$ where actions
and all fields, including the background gauge field, are real. Dimensional
reduction along time gives real 5d SYM actions with nonabelian generalizations.Comment: 31 pages, a discussion on unitarity is adde | Partially twisted superconformal M5 brane in R-symmetry gauge field
backgrounds | partially twisted superconformal m5 brane in r-symmetry gauge field backgrounds | curved superconformal abelian brane turned restrict superconformal brane sphere minkowski space. enables partially twist minkowski replace curved lorentzian manifold. brane real. nonabelian pages unitarity adde | non_dup | [] |
29568280 | 10.1007/JHEP12(2015)094 | The existing equivalence between (generalized) BMS Ward identities with
leading and subleading soft graviton theorems is extended to the case where the
scattering particles are massive scalars. By extending the action of
generalized BMS group off null infinity at late times, we show that there is a
natural action of such group not only on the radiative data at null infinity
but also on the scattering data of the massive scalar field. This leads to a
formulation of Ward identities associated to the generalized BMS group when the
scattering states are massive scalars or massless gravitons and we show that
these Ward identities are equivalent to the leading and subleading soft
graviton theorems.Comment: 30 page | Asymptotic symmetries of gravity and soft theorems for massive particles | asymptotic symmetries of gravity and soft theorems for massive particles | equivalence ward identities subleading graviton theorems massive scalars. extending infinity radiative infinity massive field. formulation ward identities massive scalars massless gravitons ward identities subleading graviton | non_dup | [] |
29565463 | 10.1007/JHEP12(2015)096 | An effective field theory for infalling observers in the vicinity of a
quasi-static black hole is given in terms of a freely falling lattice
discretization. The lattice model successfully reproduces the thermal spectrum
of outgoing Hawking radiation, as was shown by Corley and Jacobson, but can
also be used to model observations made by a typical low-energy observer who
enters the black hole in free fall at a prescribed time. The explicit short
distance cutoff ensures that, from the viewpoint of the infalling observer, any
quantum information that entered the black hole more than a scrambling time
earlier has been erased by the black hole singularity. This property, combined
with the requirement that outside observers need at least of order the
scrambling time to extract quantum information from the black hole, ensures
that a typical infalling observer does not encounter drama upon crossing the
black hole horizon in a theory where black hole information is preserved for
asymptotic observers.Comment: 20 pages, 3 figures, some minor correction | Quantum information erasure inside black holes | quantum information erasure inside black holes | infalling observers vicinity quasi freely falling discretization. successfully reproduces outgoing hawking corley jacobson observer enters fall prescribed time. cutoff ensures viewpoint infalling observer entered scrambling erased singularity. requirement observers scrambling extract ensures infalling observer encounter drama crossing horizon preserved asymptotic pages minor | non_dup | [] |
29523157 | 10.1007/JHEP12(2015)099 | If quantum gravity respects the principles of quantum mechanics, suitably
generalized, it may be that a more viable approach to the theory is through
identifying the relevant quantum structures rather than by quantizing classical
spacetime. This viewpoint is supported by difficulties of such quantization,
and by the apparent lack of a fundamental role for locality. In finite or
discrete quantum systems, important structure is provided by tensor
factorizations of the Hilbert space. However, even in local quantum field
theory properties of the generic type III von Neumann algebras and of long
range gauge fields indicate that factorization of the Hilbert space is
problematic. Instead it is better to focus on the structure of the algebra of
observables, and in particular on its subalgebras corresponding to regions.
This paper suggests that study of analogous algebraic structure in gravity
gives an important perspective on the nature of the quantum theory. Significant
departures from the subalgebra structure of local quantum field theory are
found, working in the correspondence limit of long-distances/low-energies.
Particularly, there are obstacles to identifying commuting algebras of
localized operators. In addition to suggesting important properties of the
algebraic structure, this and related observations pose challenges to proposals
of a fundamental role for entanglement.Comment: 24 pages, harvmac. v2: added ref | Hilbert space structure in quantum gravity: an algebraic perspective | hilbert space structure in quantum gravity: an algebraic perspective | respects principles mechanics suitably viable identifying quantizing spacetime. viewpoint difficulties quantization apparent locality. factorizations hilbert space. generic neumann algebras factorization hilbert problematic. observables subalgebras regions. analogous algebraic perspective theory. departures subalgebra correspondence distances energies. obstacles identifying commuting algebras localized operators. algebraic pose challenges proposals pages harvmac. | non_dup | [] |
42645291 | 10.1007/JHEP12(2015)100 | We investigate the generalized gravitational entropy from total derivative
terms in the gravitational action. Following the method of Lewkowycz and
Maldacena, we find that the generalized gravitational entropy from total
derivatives vanishes. We compare our results with the work of Astaneh,
Patrushev, and Solodukhin. We find that if total derivatives produced nonzero
entropy, the holographic and the field-theoretic universal terms of
entanglement entropy would not match. Furthermore, the second law of
thermodynamics could be violated if the entropy of total derivatives did not
vanish.Comment: 24 pages; v2: added references, Sec. 5.2 for corner entanglement, a
toy model in Sec. 5.3, and minor corrections; v3: added one reference,
published versio | Generalized Gravitational Entropy from Total Derivative Action | generalized gravitational entropy from total derivative action | gravitational gravitational action. lewkowycz maldacena gravitational derivatives vanishes. astaneh patrushev solodukhin. derivatives nonzero holographic theoretic universal entanglement match. thermodynamics violated derivatives pages sec. corner entanglement sec. minor versio | non_dup | [] |
42639051 | 10.1007/JHEP12(2015)101 | We present the finite temperature spectra of both bottomonium and charmonium,
obtained from a consistent lattice QCD based potential picture. Starting point
is the complex in-medium potential extracted on full QCD lattices with
dynamical u,d and s quarks, generated by the HotQCD collaboration. Using the
generalized Gauss law approach, vetted in a previous study on quenched QCD, we
fit ${\rm Re}[V]$ with a single temperature dependent parameter $m_D$, the
Debye screening mass, and confirm the up to now tentative values of ${\rm
Im}[V]$. The obtained analytic expression for the complex potential allows us
to compute quarkonium spectral functions by solving an appropriate
Schr\"odinger equation. These spectra exhibit thermal widths, which are free
from the resolution artifacts that plague direct reconstructions from Euclidean
correlators using Bayesian methods. In the present adiabatic setting, we find
clear evidence for sequential melting and derive melting temperatures for the
different bound states. Quarkonium is gradually weakened by both screening
(${\rm Re}[V]$) and scattering (${\rm Im}[V]$) effects that in combination lead
to a shift of their in-medium spectral features to smaller frequencies,
contrary to the mass gain of elementary particles at finite temperature.Comment: 36 pages, 11 figures (added figures and supplementary discussion,
submitted to JHEP | Quarkonium at finite temperature: Towards realistic phenomenology from
first principles | quarkonium at finite temperature: towards realistic phenomenology from first principles | bottomonium charmonium picture. lattices quarks hotqcd collaboration. gauss vetted quenched debye screening confirm tentative analytic quarkonium solving schr odinger equation. exhibit widths artifacts plague reconstructions euclidean correlators bayesian methods. adiabatic sequential melting derive melting states. quarkonium gradually weakened screening contrary elementary pages supplementary submitted jhep | non_dup | [] |
42643421 | 10.1007/JHEP12(2015)102 | We analyze the pertubative contributions to the $D^4 R^4$ and $D^6 R^4$
couplings in the low-energy effective action of type II string theory
compactified on a torus $T^d$, with particular emphasis on two-loop
corrections. In general, it is necessary to introduce an infrared cut-off
$\Lambda$ to separate local interactions from non-local effects due to the
exchange of massless states. We identify the degenerations of the genus-two
Riemann surface which are responsible for power-like dependence on $\Lambda$,
and give an explicit prescription for extracting the $\Lambda$-independent
effective couplings. These renormalized couplings are then shown to be
eigenmodes of the Laplace operator with respect to the torus moduli, up to
computable anomalous source terms arising in the presence of logarithmic
divergences, in precise agreement with predictions from U-duality. Our results
for the two-loop $D^6 R^4$ contribution also probe essential properties of the
Kawazumi-Zhang invariantComment: 23 page | Infrared divergences and harmonic anomalies in the two-loop superstring
effective action | infrared divergences and harmonic anomalies in the two-loop superstring effective action | analyze pertubative couplings compactified torus emphasis corrections. infrared lambda massless states. degenerations genus riemann lambda prescription extracting lambda couplings. renormalized couplings eigenmodes laplace torus moduli computable anomalous arising logarithmic divergences precise duality. kawazumi invariantcomment | non_dup | [] |
42646774 | 10.1007/JHEP12(2015)103 | We perform the step-scaling investigation of the running coupling constant,
using the gradient-flow scheme, in SU(3) gauge theory with twelve massless
fermions in the fundamental representation. The Wilson plaquette gauge action
and massless unimproved staggered fermions are used in the simulations. Our
lattice data are prepared at high accuracy, such that the statistical error for
the renormalised coupling, g_GF, is at the subpercentage level. To investigate
the reliability of the continuum extrapolation, we employ two different lattice
discretisations to obtain g_GF. For our simulation setting, the corresponding
gauge-field averaging radius in the gradient flow has to be almost half of the
lattice size, in order to have this extrapolation under control. We can
determine the renormalisation group evolution of the coupling up to g^2_GF ~ 6,
before the onset of the bulk phase structure. In this infrared regime, the
running of the coupling is significantly slower than the two-loop perturbative
prediction, although we cannot draw definite conclusion regarding possible
infrared conformality of this theory. Furthermore, we comment on the issue
regarding the continuum extrapolation near an infrared fixed point. In addition
to adopting the fit ansatz a'la Symanzik for performing this task, we discuss a
possible alternative procedure inspired by properties derived from low-energy
scale invariance at strong coupling. Based on this procedure, we propose a
finite-size scaling method for the renormalised coupling as a means to search
for infrared fixed point. Using this method, it can be shown that the behaviour
of the theory around g^2_GF ~ 6 is still not governed by possible infrared
conformality.Comment: 24 pages, 6 figures; Published version; Appendix A added for
tabulating data; One reference included; Typos correcte | The Yang-Mills gradient flow and SU(3) gauge theory with 12 massless
fundamental fermions in a colour-twisted box | the yang-mills gradient flow and su(3) gauge theory with 12 massless fundamental fermions in a colour-twisted box | running twelve massless fermions representation. wilson plaquette massless unimproved staggered fermions simulations. renormalised subpercentage level. reliability continuum extrapolation employ discretisations averaging extrapolation control. renormalisation onset structure. infrared running slower perturbative draw definite infrared conformality theory. comment continuum extrapolation infrared point. adopting ansatz symanzik performing inspired invariance coupling. propose renormalised infrared point. governed infrared pages tabulating typos correcte | non_dup | [] |
42639363 | 10.1007/JHEP12(2015)104 | We verify the self-duality of Green-Schwarz supercoset sigma models on AdS$_d
\times S^d $ backgrounds (d=2,3,5) under combined bosonic and fermionic
T-dualities without gauge fixing kappa symmetry. We also prove this property
for superstrings on AdS$_d \times S^d \times S^d$ (d=2,3) described by
supercoset sigma models with the isometries governed by the exceptional Lie
supergroups $D(2,1;\alpha)$ (d=2) and $D(2,1;\alpha)\times D(2,1;\alpha)$
(d=3), which requires an additional T-dualisation along one of the spheres.
Then, by taking into account the contribution of non-supercoset fermionic modes
(up to the second order), we provide evidence for the T-self-duality of the
complete type IIA and IIB Green-Schwarz superstring theory on AdS$_d\times S^d
\times T^{10-2d}$ (d=2,3) backgrounds with Ramond-Ramond fluxes. Finally,
applying the Buscher-like rules to T-dualising supergravity fields, we prove
the T-self-duality of the whole class of the AdS$_d\times S^d \times M^{10-2d}$
superbackgrounds with Ramond-Ramond fluxes in the context of supergravity.Comment: v2: 57 pages, 1 figure, typos fixed and clarifications added, version
to appear in JHE | T-Duality of Green-Schwarz Superstrings on AdS(d) x S(d) x M(10-2d) | t-duality of green-schwarz superstrings on ads(d) x s(d) x m(10-2d) | verify duality schwarz supercoset sigma backgrounds bosonic fermionic dualities fixing kappa symmetry. superstrings supercoset sigma isometries governed exceptional supergroups alpha alpha alpha dualisation spheres. supercoset fermionic duality schwarz superstring backgrounds ramond ramond fluxes. buscher dualising supergravity duality superbackgrounds ramond ramond fluxes pages typos clarifications | non_dup | [] |
42647589 | 10.1007/JHEP12(2015)106 | We develop the BRST approach for all massless integer and half-integer higher
spins in 4D Minkowski space, using the two component spinor nota- tion and
develop the Lagrangian formulation for supersymmetric higher spin models. It is
shown that the problem of second class constraints disappears and the BRST
procedure becomes much more simple than in tensorial nota- tion. Furthermore,
we demonstrate that the BRST procedure automatically provides extra auxiliary
components that belong in the set of supersymmetry auxiliary components.
Finally, we demonstrate how supersymmetry transfo- rmations are realized in
such an approach. As a result, we conclude that the BRST approach to higher
spin supersymmetric theories allows to derive both the Lagrangian and the
supersymmetry transformations. Although most part of the work is devoted to
massless component supersymmetric models, we also discuss generalization for
massive component supersymmetric models and for superfield models | BRST Analysis of the Supersymmetric Higher Spin Field Models | brst analysis of the supersymmetric higher spin field models | brst massless integer integer spins minkowski spinor nota lagrangian formulation supersymmetric models. disappears brst tensorial nota tion. brst automatically extra auxiliary belong supersymmetry auxiliary components. supersymmetry transfo rmations realized approach. brst supersymmetric derive lagrangian supersymmetry transformations. devoted massless supersymmetric generalization massive supersymmetric superfield | non_dup | [] |
29544127 | 10.1007/JHEP12(2015)108 | Models of large-field inflation based on axion-like fields with shift
symmetries can be simple and natural, and make a promising prediction of
detectable primordial gravitational waves. The Weak Gravity Conjecture is known
to constrain the simplest case in which a single compact axion descends from a
gauge field in an extra dimension. We argue that the Weak Gravity Conjecture
also constrains a variety of theories of multiple compact axions including
N-flation and some alignment models. We show that other alignment models entail
surprising consequences for how the mass spectrum of the theory varies across
the axion moduli space, and hence can be excluded if further conjectures hold.
In every case that we consider, plausible assumptions lead to field ranges that
cannot be parametrically larger than the Planck scale. Our results are strongly
suggestive of a general inconsistency in models of large-field inflation based
on compact axions, and possibly of a more general principle forbidding
super-Planckian field ranges.Comment: v2: 40 pages, 3 figures. Appendix added, references added, details
modified in light of subsequent work on KK photon | Weak Gravity Strongly Constrains Large-Field Axion Inflation | weak gravity strongly constrains large-field axion inflation | inflation axion symmetries promising detectable primordial gravitational waves. conjecture constrain simplest axion descends extra dimension. argue conjecture constrains axions flation alignment models. alignment entail surprising consequences varies axion moduli excluded conjectures hold. plausible assumptions ranges parametrically planck scale. suggestive inconsistency inflation axions possibly forbidding super planckian pages figures. | non_dup | [] |
29568936 | 10.1007/JHEP12(2015)109 | The 1-loop partition function of the handle-body solutions in the AdS$_3$
gravity have been derived some years ago using the heat-kernel and the method
of images. In the semiclassical limit, such partition function should
correspond to the order $O (c^0)$ part in the partition function of dual
conformal field theory on the boundary Riemann surface. The higher genus
partition function could be computed by the multi-point functions in the
Riemann sphere via sewing prescription. In the large central charge limit, to
the leading order of $c$, the multi-point function is further simplified to be
a summation over the product of two-point functions, which may form links. Each
link is in one-to-one correspondence with the conjugacy class of the Schottky
group of the Riemann surface. Moreover, the value of a link is determined by
the eigenvalue of the element in the conjugate class. This allows us to
reproduce exactly the gravitational 1-loop partition function. The proof can be
generalized to the higher spin gravity and its dual CFT.Comment: 30 pages, 8 figures; typos corrected, more clarifications, references
and acknowledgements adde | One loop partition function in AdS_3/CFT_2 | one loop partition function in ads_3/cft_2 | partition handle kernel images. semiclassical partition partition conformal riemann surface. genus partition riemann sphere sewing prescription. simplified summation links. correspondence conjugacy schottky riemann surface. eigenvalue conjugate class. reproduce gravitational partition function. pages typos corrected clarifications acknowledgements adde | non_dup | [] |
42640317 | 10.1007/JHEP12(2015)110 | We derive the exact vortex partition function in 2d $\mathcal{N}$ = (2,2)
gauge theory on the Omega-background, applying the localization scheme in the
Higgs phase. We show that the partition function at a finite Omega-deformation
parameter $\epsilon$ satisfies a system of differential equations, which can be
interpreted as a quantized version of the twisted F-term equations
characterizing the SUSY vacua. Using the differential equations derived in this
paper, we show the correspondence between the partition function of the
two-dimensional vortex string worldsheet theory and the Nekrasov partition
function at the root of Higgs branch of the four-dimensional $\mathcal{N}$ = 2
theory with two Omega-deformation parameters $(\epsilon_1,\epsilon_2)$.Comment: 1+45 pages, 7 figures; typos corrected, references adde | 2d Partition Function in Omega-background and Vortex/Instanton
Correspondence | 2d partition function in omega-background and vortex/instanton correspondence | derive vortex partition mathcal omega localization phase. partition omega deformation epsilon satisfies interpreted quantized twisted characterizing susy vacua. correspondence partition vortex worldsheet nekrasov partition branch mathcal omega deformation epsilon epsilon .comment pages typos corrected adde | non_dup | [] |
29567348 | 10.1007/JHEP12(2015)111 | We consider the BPS conditions of eleven dimensional supergravity, restricted
to an appropriate ansatz for black holes in four non-compact directions.
Assuming the internal directions to be described by a circle fibration over a
K\"ahler manifold and considering the case where the complex structure moduli
are frozen, we recast the resulting flow equations in terms of polyforms on
this manifold. The result is a set of equations that are in direct
correspondence with those of gauged supergravity models in four dimensions
consistent with our simplifying assumptions. In view of this correspondence
even for internal manifolds that do not correspond to known consistent
truncations, we comment on the possibility of obtaining gauged supergravities
from reductions on K\"ahler manifolds.Comment: 32 pages, v2: references addes, typos correcte | AdS4 black holes from M-theory | ads4 black holes from m-theory | eleven supergravity restricted ansatz holes directions. directions circle fibration ahler manifold moduli frozen recast polyforms manifold. correspondence gauged supergravity simplifying assumptions. correspondence manifolds truncations comment obtaining gauged supergravities reductions ahler pages addes typos correcte | non_dup | [] |
42642439 | 10.1007/JHEP12(2015)112 | The trace anomaly of conformal field theories in four dimensions is
characterized by '$a$' and '$c$'-functions. The scaling properties of the
effective action of a CFT in the presence of boundaries is shown to be
determined by $a$, $c$ and two new functions (charges) related to boundary
effects. The boundary charges are computed for different theories and different
boundary conditions. One of the boundary charges depends on the bulk $c$
charge.Comment: 9 pages, no figures, misprints in Table 1 and typos corrected, new
references added, a possible relation between boundary and bulk charges is
pointed ou | Conformal anomalies of CFT's with boundaries | conformal anomalies of cft's with boundaries | trace anomaly conformal functions. boundaries charges effects. charges conditions. charges pages misprints typos corrected charges pointed | non_dup | [] |
42639472 | 10.1007/JHEP12(2015)114 | We consider the basic radius changing conformal interface for a free compact
boson. After investigating different theoretical aspects of this object we
focus on the fusion of this interface with conformal boundary conditions. At
fractions of the self-dual radius there exist exceptional D-branes. It was
argued in [1] that changing the radius in the bulk induces a boundary RG flow.
Following [2] we conjecture that fusing the basic radius changing interface
(that changes the radius from a fraction of the self-dual radius) with the
exceptional boundary conditions gives the boundary condition which is the end
point of the RG flow considered in [1]. By studying the fusion singularities we
recover RG logarithms and see, in particular instances, how they get resummed
into power singularities. We discuss what quantities need to be calculated to
gain full non-perturbative control over the fusion.Comment: 31 page, 3 figure | Fusion of conformal interfaces and bulk induced boundary RG flows | fusion of conformal interfaces and bulk induced boundary rg flows | changing conformal boson. investigating fusion conformal conditions. fractions exceptional branes. argued changing induces flow. conjecture fusing changing exceptional studying fusion singularities recover logarithms instances resummed singularities. quantities perturbative | non_dup | [] |
42646798 | 10.1007/JHEP12(2015)115 | We describe a stabilization mechanism for fuzzy $S^4_N$ in the Euclidean IIB
matrix model due to vacuum energy in the presence of a positive mass term. The
one-loop effective potential for the radius contains an attractive contribution
attributed to supergravity, while the mass term induces a repulsive
contribution for small radius due to SUSY breaking. This leads to a
stabilization of the radius. The mechanism should be pertinent to recent
results on the genesis of 3+1-dimensional space-time in the Minkowskian IIB
model.Comment: 28 pages, 3 figures. V2: typos fixed, improved discussion, published
version. V3,V4: reference adde | One-loop stabilization of the fuzzy four-sphere via softly broken SUSY | one-loop stabilization of the fuzzy four-sphere via softly broken susy | stabilization fuzzy euclidean term. attractive attributed supergravity induces repulsive susy breaking. stabilization radius. pertinent genesis minkowskian pages figures. typos version. adde | non_dup | [] |
42651110 | 10.1007/JHEP12(2015)116 | It is interesting to ask how a confinement scale affects the thermalization
of strongly coupled gauge theories with gravity duals. We study this question
for the AdS soliton model, which underlies top-down holographic models for
Yang-Mills theory and QCD. Injecting energy via a homogeneous massless scalar
source that is briefly turned on, our fully backreacted numerical analysis
finds two regimes. Either a black brane forms, possibly after one or more
bounces, after which the pressure components relax according to the lowest
quasinormal mode. Or the scalar shell keeps scattering, in which case the
pressure components oscillate and undergo modulation on time scales independent
of the (small) shell amplitude. We show analytically that the scattering shell
cannot relax to a homogeneous equilibrium state, and explain the modulation as
due to a near-resonance between a normal mode frequency of the metric and the
frequency with which the scalar shell oscillates.Comment: 33 pages, 12 figures; v2: Figure and further discussion added in
Section | Holographic thermalization in a top-down confining model | holographic thermalization in a top-down confining model | confinement affects thermalization duals. soliton underlies holographic mills qcd. injecting homogeneous massless briefly turned backreacted finds regimes. brane possibly bounces relax quasinormal mode. keeps oscillate undergo modulation amplitude. analytically relax homogeneous modulation pages | non_dup | [] |
29550240 | 10.1007/JHEP12(2015)117 | We study the three-dimensional effective action obtained by reducing
eleven-dimensional supergravity with higher-derivative terms on a background
solution including a warp-factor, an eight-dimensional compact manifold, and
fluxes. The dynamical fields are K\"ahler deformations and vectors from the
M-theory three-form. We show that the potential is only induced by fluxes and
the naive contributions obtained from higher-curvature terms on a Calabi-Yau
background vanish once the back-reaction to the full solution is taken into
account. For the resulting three-dimensional action we analyse the K\"ahler
potential and complex coordinates and show compatibility with N=2
supersymmetry. We argue that the higher-order result is also compatible with a
no-scale condition. We find that the complex coordinates should be formulated
as divisor integrals for which a non-trivial interplay between the warp-factor
terms and the higher-curvature terms allow a derivation of the moduli space
metric. This leads us to discuss higher-derivative corrections to the M5-brane
action.Comment: 26 page | The effective action of warped M-theory reductions with
higher-derivative terms - Part II | the effective action of warped m-theory reductions with higher-derivative terms - part ii | reducing eleven supergravity warp eight manifold fluxes. ahler deformations form. fluxes naive curvature calabi vanish account. analyse ahler compatibility supersymmetry. argue compatible condition. formulated divisor integrals trivial interplay warp curvature derivation moduli metric. brane | non_dup | [] |
29568168 | 10.1007/JHEP12(2015)118 | Many methods exist for the construction of the Hilbert series describing the
moduli spaces of instantons. We explore some of the underlying group theoretic
relationships between these various constructions, including those based on the
Coulomb branches and Higgs branches of SUSY quiver gauge theories, as well as
those based on generating functions derivable from the Weyl Character Formula.
We show how the character description of the reduced single instanton moduli
space of any Classical or Exceptional group can be deconstructed faithfully in
terms of characters or modified Hall-Littlewood polynomials of its regular
semi-simple subgroups. We derive and utilise Highest Weight Generating
functions, both for the characters of Classical or Exceptional groups and for
the Hall-Littlewood polynomials of unitary groups. We illustrate how the root
space data encoded in extended Dynkin diagrams corresponds to relationships
between the Coulomb branches of quiver gauge theories for instanton moduli
spaces and those for T(SU(N)) moduli spaces.Comment: 97 pages, 12 figure | Construction and Deconstruction of Single Instanton Hilbert Series | construction and deconstruction of single instanton hilbert series | hilbert describing moduli instantons. explore theoretic constructions coulomb branches branches susy quiver generating derivable weyl character formula. character instanton moduli exceptional deconstructed faithfully characters hall littlewood polynomials subgroups. derive utilise generating characters exceptional hall littlewood polynomials unitary groups. illustrate encoded dynkin diagrams coulomb branches quiver instanton moduli moduli pages | non_dup | [] |
29556690 | 10.1007/JHEP12(2015)119 | We discuss the role of Minkowski 3-forms in flux string vacua. In these vacua
all internal closed string fluxes are in one to one correspondence with
quantized Minkowski 4-forms. By performing a dimensional reduction of the
$D=10$ Type II supergravity actions we find that the 4-forms act as auxiliary
fields of the Kahler and complex structure moduli in the effective action. We
show that all the RR and NS axion dependence of the flux scalar potential
appears through the said 4-forms. Gauge invariance of these forms then severely
restricts the structure of the axion scalar potentials. Combined with duality
symmetries it suggests that all perturbative corrections to the leading axion
scalar potential $V_0$ should appear as an expansion in powers of $V_0$ itself.
These facts could have an important effect e.g. on the inflaton models based on
F-term axion monodromy. We also suggest that the involved multi-branched
structure of string vacua provides for a new way to maintain interacting scalar
masses stable against perturbative corrections.Comment: 39 pages. Typos corrected and added reference | Minkowski 3-forms, Flux String Vacua, Axion Stability and Naturalness | minkowski 3-forms, flux string vacua, axion stability and naturalness | minkowski vacua. vacua fluxes correspondence quantized minkowski forms. performing supergravity auxiliary kahler moduli action. axion said forms. invariance severely restricts axion potentials. duality symmetries perturbative axion powers itself. facts e.g. inflaton axion monodromy. branched vacua maintain interacting perturbative pages. typos corrected | non_dup | [] |
42644446 | 10.1007/JHEP12(2015)120 | We present a general classification of simplified models that lead to dark
matter (DM) coannihilation processes of the form DM + X $\rightarrow$ SM$_1$ +
SM$_2$, where X is a coannihilation partner for the DM particle and SM$_1$,
SM$_2$ are Standard Model fields. Our classification also encompasses regular
DM pair annihilation scenarios if DM and X are identical. Each coannhilation
scenario motivates the introduction of a mediating particle M that can either
belong to the Standard Model or be a new field, whereby the resulting
interactions between the dark sector and the Standard Model are realized as
tree-level and dimension-four couplings. We construct a basis of coannihilation
models, classified by the $SU(3)_C\times SU(2)_L\times U(1)_Y$ quantum numbers
of DM, X and M. Our main assumptions are that dark matter is an electrically
neutral color singlet and that all new particles are either scalars, Dirac or
Majorana fermions, or vectors. We illustrate how new scenarios arising from
electroweak symmetry breaking effects can be connected to our electroweak
symmetric simplified models. We offer a comprehensive discussion of the
phenomenological features of our models, encompassing the physics of thermal
freeze-out, direct and indirect detection constraints, and in particular
searches at the Large Hadron Collider (LHC). Many novel signatures that are not
covered in current LHC searches are emphasized, and new and improved LHC
analyses tackling these signatures are proposed. We discuss how the
coannihilation simplified models can be used to connect results from all
classes of experiments in a straightforward and transparent way. This point is
illustrated with a detailed discussion of the phenomenology of a particular
simplified model featuring leptoquark-mediated dark matter coannihilation.Comment: 91 pages, 27 figures, 15 tables; v2, references added, matches
published versio | The Coannihilation Codex | the coannihilation codex | simplified coannihilation rightarrow coannihilation partner fields. encompasses annihilation scenarios identical. coannhilation motivates mediating belong whereby realized couplings. coannihilation classified assumptions electrically neutral singlet scalars dirac majorana fermions vectors. illustrate scenarios arising electroweak breaking electroweak simplified models. offer comprehensive phenomenological encompassing freeze indirect searches hadron collider signatures covered searches emphasized tackling signatures proposed. coannihilation simplified connect straightforward transparent way. illustrated phenomenology simplified featuring leptoquark pages tables matches versio | non_dup | [] |
42638053 | 10.1007/JHEP12(2015)121 | We study the conformal bootstrap constraints for 4D $\mathcal{N}=1$
superconformal field theories containing a chiral operator $\phi$ and the
chiral ring relation $\phi^2=0$. Hints for a minimal interacting SCFT in this
class have appeared in previous numerical bootstrap studies. We perform a
detailed study of the properties of this conjectured theory, establishing that
the corresponding solution to the bootstrap constraints contains a
$\text{U}(1)_R$ current multiplet and estimating the central charge and
low-lying operator spectrum of this theory.Comment: 9 pages, 11 figure | Exploring the Minimal 4D $\mathcal{N}=1$ SCFT | exploring the minimal 4d $\mathcal{n}=1$ scft | conformal bootstrap mathcal superconformal chiral chiral hints interacting scft appeared bootstrap studies. conjectured establishing bootstrap multiplet estimating lying pages | non_dup | [] |
29557956 | 10.1007/JHEP12(2015)122 | The double field theory action in the flux formulation is dimensionally
reduced on a Calabi-Yau three-fold equipped with non-vanishing type IIB
geometric and non-geometric fluxes. First, we rewrite the metric-dependent
reduced DFT action in terms of quantities that can be evaluated without
explicitly knowing the metric on the Calabi-Yau manifold. Second, using
properties of special geometry we obtain the scalar potential of N=2 gauged
supergravity. After an orientifold projection, this potential is consistent
with the scalar potential arising from the flux-induced superpotential, plus an
additional D-term contribution.Comment: 44 pages; v2: minor changes, references added; v3: published version,
more detailed discussion in section 2.3, reference adde | Relating Double Field Theory to the Scalar Potential of N=2 Gauged
Supergravity | relating double field theory to the scalar potential of n=2 gauged supergravity | formulation dimensionally calabi equipped vanishing geometric geometric fluxes. rewrite quantities explicitly knowing calabi manifold. gauged supergravity. orientifold projection arising superpotential pages minor adde | non_dup | [] |
42643310 | 10.1007/JHEP12(2015)123 | As a means of examining the section condition and its possible solutions and
relaxations, we perform twistor transforms related to versions of exceptional
field theory with Minkowski signature. The spinor parametrisation of the
momenta naturally solves simultaneously both the mass-shell condition and the
(weak) section condition. It is shown that the incidence relations for
multi-particle twistors force them to share a common section, but not to be
orthogonal. The supersymmetric extension contains additional scalar fermionic
variables shown to be kappa-symmetry invariants. We speculate on some
implications, among them a possible relation to higher spin theory.Comment: 14 pp. v2: minor change | Twistors and supertwistors for exceptional field theory | twistors and supertwistors for exceptional field theory | examining relaxations twistor transforms versions exceptional minkowski signature. spinor parametrisation momenta naturally solves simultaneously condition. incidence twistors share orthogonal. supersymmetric fermionic kappa invariants. speculate minor | non_dup | [] |
29549482 | 10.1007/JHEP12(2015)124 | We evaluate five point world-sheet string theory amplitudes of one transverse
scalar field, two world volume gauge fields ( and two transverse scalars, a
gauge field) in the presence of a closed string Ramond-Ramond vertex operator
in its symmetric picture. We carry out all the entire S-matrix elements of five
point mixed RR-scalars/gauge fields $<C^{-1}\phi ^{0}A^{-1} A^{0}>$,
$<C^{-1}\phi ^{-1}A^{0} A^{0}>$, $<C^{-1}A^{0}\phi ^{-1}\phi^{0}>$ and
$<C^{-1}A^{-1}\phi ^{0}\phi^{0}>$ in detail and start comparing all order
$\alpha'$ contact interactions and singularities in both transverse and world
volume directions. We explore the presence of various new couplings in string
theory effective actions and find out their all order $\alpha'$ higher
derivative corrections in both type IIA and IIB. Ultimately we make various
remarks for the singularities and contact terms whose RR momenta are embedded
in transverse directions. $\alpha'$ corrections to some of Myers terms are also
addressed.Comment: V2:39 pages,no figure, Latex file. The style has been improved,
explanations and clarifications are given. The accepted version in JHE | On RR Couplings, Singularity Structures and all order $\alpha'$ contact
interactions to BPS String Amplitudes | on rr couplings, singularity structures and all order $\alpha'$ contact interactions to bps string amplitudes | sheet amplitudes scalars ramond ramond picture. carry scalars alpha singularities directions. explore couplings alpha iib. ultimately remarks singularities momenta embedded directions. alpha myers pages latex file. style explanations clarifications given. | non_dup | [] |
29552108 | 10.1007/JHEP12(2015)126 | Non-standard neutrino interactions (NSI) involved in neutrino propagation
inside Earth matter could potentially alter atmospheric neutrino fluxes. In
this work, we look at the impact of these NSI on the signal at the ICAL
detector to be built at the India-based Neutrino Observatory (INO). We show how
the sensitivity to the neutrino mass hierarchy of ICAL changes in the presence
of NSI. The mass hierarchy sensitivity is shown to be rather sensitive to the
NSI parameters $\epsilon_{e\mu}$ and $\epsilon_{e\tau}$, while the dependence
on $\epsilon_{\mu\tau}$ and $\epsilon_{\tau\tau}$ is seen to be very mild, once
the $\chi^2$ is marginalised over oscillation and NSI parameters. If the NSI
are large enough, the event spectrum at ICAL is expected to be altered and this
can be used to discover new physics. We calculate the lower limit on NSI
parameters above which ICAL could discover NSI at a given C.L. from 10 years of
data. If NSI were too small, the null signal at ICAL can constrain the NSI
parameters. We give upper limits on the NSI parameters at any given C.L. that
one is expected to put from 10 years of running of ICAL. Finally, we give C.L.
contours in the NSI parameter space that is expected to be still allowed from
10 years of running of the experiment.Comment: 24 pages, minor improvement | Neutrino Physics with Non-Standard Interactions at INO | neutrino physics with non-standard interactions at ino | propagation earth potentially alter fluxes. look ical built india observatory hierarchy ical nsi. hierarchy epsilon epsilon epsilon epsilon mild marginalised oscillation parameters. ical altered discover physics. ical discover c.l. data. ical constrain parameters. c.l. running ical. c.l. contours running pages minor | non_dup | [] |
42647328 | 10.1007/JHEP12(2015)127 | We investigate the scalar sector in an extension of the Minimal
Supersymmetric Standard Model (MSSM) containing a $SU(2)$ Higgs triplet of zero
hypercharge and a gauge singlet beside the $SU(2)$ scalar doublets. In
particular, we focus on a scenario of this model which allows a light
pseudoscalar and/or a scalar below $100$ GeV, consistent with the most recent
data from the LHC and the earlier data from the LEP experiments. We analyze the
exotic decay of the discovered Higgs $(h_{125})$ into two light (hidden) Higgs
bosons present in the extension. The latter are allowed by the uncertainties in
the Higgs decay $h_{125}\to WW^*$, $h_{125}\to ZZ^*$ and $h_{125}\to
\gamma\gamma$. The study of the parameter space for such additional
scalars/pseudoscalars decay of the Higgs is performed in the gluon fusion
channel. The extra hidden Higgs bosons of the enlarged scalar sector, if they
exist, will then decay into lighter fermion paris, i.e., $b\bar{b}$,
$\tau\bar{\tau}$ and $\mu\bar{\mu}$ via the mixing with the doublets. A
detailed simulation using PYTHIA of the $2b+2\tau$, $\geq 3\tau$, $2b+2\mu$ and
$2\tau+2\mu$ final states is presented. From our analysis we conclude that,
depending on the selected benchmark points, such decay modes can be explored
with an integrated luminosity of 25 fb$^{-1}$ at the LHC at a center of mass
energy of 13 TeV.Comment: 28 pages and 16 figure | Probing the Hidden Higgs Bosons of the $Y=0$ Triplet- and
Singlet-Extended Supersymmetric Standard Model at the LHC | probing the hidden higgs bosons of the $y=0$ triplet- and singlet-extended supersymmetric standard model at the lhc | supersymmetric mssm triplet hypercharge singlet beside doublets. pseudoscalar experiments. analyze exotic discovered hidden bosons extension. gamma gamma scalars pseudoscalars gluon fusion channel. extra hidden bosons enlarged lighter fermion paris i.e. doublets. pythia presented. benchmark explored luminosity pages | non_dup | [] |
29558149 | 10.1007/JHEP12(2015)128 | The LHCb has discovered two new states with preferred $J^P$ quantum numbers
$3/2^-$ and $5/2^+$ from $\Lambda_b$ decays. These new states can be
interpreted as hidden charm pentaquarks. It has been argued that the main
features of these pentaquarks can be described by diquark model. The diquark
model predicts that the $3/2^-$ and $5/2^+$ are in two separate octet
multiplets of flavor $SU(3)$ and there is also an additional decuplet
pentaquark multiplet. Finding the states in these multiplets can provide
crucial evidence for this model. The weak decays of b-baryon to a light meson
and a pentaquark can have Cabibbo allowed and suppressed decay channels. We
find that in the $SU(3)$ limit, for $U$-spin related decay modes the ratio of
the decay rates of Cabibbo suppressed to Cabibbo allowed decay channels is
given by $|V_{cd}|^2/|V_{cs}|^2$. There are also other testable relations for
b-baryon weak decays into a pentaquark and a light pseudoscalar. These
relations can be used as tests for the diquark model for pentaquark.Comment: revtex, 19 pages, 3 figures. one reference added and some typos
correcte | Some Predictions of Diquark Model for Hidden Charm Pentaquark Discovered
at the LHCb | some predictions of diquark model for hidden charm pentaquark discovered at the lhcb | lhcb discovered preferred lambda decays. interpreted hidden charm pentaquarks. argued pentaquarks diquark model. diquark predicts octet multiplets flavor decuplet pentaquark multiplet. multiplets crucial model. decays baryon meson pentaquark cabibbo suppressed channels. cabibbo suppressed cabibbo testable baryon decays pentaquark pseudoscalar. diquark revtex pages figures. typos correcte | non_dup | [] |
29565626 | 10.1007/JHEP12(2015)129 | A huge swath of parameter space in the context of the Minimal Supersymmetric
Standard Model (MSSM) has been ruled at after run I of the LHC. Various
exclusion contours in the $m_{\tilde{g}}-\m_{\tilde{\chi}_{1}^{0}}$ plane were
derived by the experimental collaborations, all based on three-body gluino
decay topologies. These limits are however extremely model dependent and do not
always reflect the level of exclusion. If the gluino-neutralino spectrum is
compressed, then the current mass limits can be drastically reduced. In such
situations, the radiative decay of the gluino $\gino \ra g \neut{1}$ can be
dominant and used as a sensitive probe of small mass splittings. We examine the
sensitivity of constraints of some Run I experimental searches on this decay
after recasting them within the \texttt{MadAnalysis5} framework. The recasted
searches are now part of the \texttt{MadAnalysis5} Public Analysis Database. We
also design a dedicated search strategy and investigate its prospects to
uncover this decay mode of the gluino at run II of the LHC. We emphasize that a
multijet search strategy may be more sensitive than a monojet one, even in the
case of very small mass differences.Comment: 34 pages , 6 figures. Version accepted for publication for JHE | Closing in on compressed gluino-neutralino spectra at the LHC | closing in on compressed gluino-neutralino spectra at the lhc | huge swath supersymmetric mssm ruled lhc. exclusion contours tilde tilde collaborations gluino topologies. extremely reflect exclusion. gluino neutralino compressed drastically reduced. situations radiative gluino gino neut splittings. examine searches recasting texttt madanalysis framework. recasted searches texttt madanalysis database. dedicated prospects uncover gluino lhc. emphasize multijet monojet pages figures. publication | non_dup | [] |
29556118 | 10.1007/JHEP12(2015)132 | We propose two new simple lepton flavor models in the framework of the $S_4$
flavor symmetry. The neutrino mass matrices, which are given by two complex
parameters, lead to the inverted mass hierarchy. The charged lepton mass matrix
has the 1-2 lepton flavor mixing, which gives the non-vanishing reactor angle
$\theta_{13}$. These models predict the Dirac phase and the Majorana phases,
which are testable in the future experiments. The predicted magnitudes of the
effective neutrino mass for the neutrino-less double beta decay are in the
regions as $32~\text{meV}\lesssim |m_{ee}|\lesssim 49~\text{meV}$ and
$34~\text{meV}\lesssim |m_{ee}|\lesssim 59~\text{meV}$, respectively. These
values are close to the expected reaches of the coming experiments. The total
sum of the neutrino masses are predicted in both models as
$0.0952~\text{eV}\lesssim \sum m_i\lesssim 0.101~\text{eV}$ and
$0.150~\text{eV}\lesssim \sum m_i\lesssim 0.160~\text{eV}$, respectively.Comment: 27 pages, 14 figures, final versio | Testing the minimal $S_4$ model of neutrinos with the Dirac and Majorana
phases | testing the minimal $s_4$ model of neutrinos with the dirac and majorana phases | propose lepton flavor flavor symmetry. inverted hierarchy. lepton lepton flavor vanishing reactor theta predict dirac majorana testable experiments. magnitudes beta lesssim lesssim lesssim lesssim respectively. reaches coming experiments. lesssim lesssim lesssim lesssim pages versio | non_dup | [] |
29532045 | 10.1007/JHEP12(2015)133 | We derive the explicit expression for the four-point correlation function of
stress-energy tensors in four-dimensional N=4 superconformal theory. We show
that it has a remarkably simple and suggestive form allowing us to predict a
large class of four-point correlation functions involving the stress-energy
tensor and other conserved currents. We then apply the obtained results on the
correlation functions to computing the energy-energy correlations, which
measure the flow of energy in the final states created from the vacuum by a
source. We demonstrate that they are given by a universal function independent
of the choice of the source. Our analysis relies only on N=4 superconformal
symmetry and does not use the dynamics of the theory.Comment: 31 pages; v2: references adde | Four-point correlation function of stress-energy tensors in N=4
superconformal theories | four-point correlation function of stress-energy tensors in n=4 superconformal theories | derive tensors superconformal theory. remarkably suggestive allowing predict involving conserved currents. created source. universal source. relies superconformal pages adde | non_dup | [] |
29542048 | 10.1007/JHEP12(2015)134 | We provide a unified description of cosmological $\alpha$-attractors and
late-time acceleration, in excellent agreement with the latest Planck data. Our
construction involves two superfields playing distinctive roles: one is the
dynamical field and its evolution determines inflation and dark energy, the
other is nilpotent and responsible for a landscape of vacua and supersymmetry
breaking. We prove that the attractor nature of the theory is enhanced when
combining the two sectors: cosmological attractors are very stable with respect
to any possible value of the cosmological constant and, interestingly, to any
generic coupling of the inflationary sector with the field responsible for
uplifting. Finally, as related result, we show how specific couplings generate
an arbitrary inflaton potential in a supergravity framework with varying Kahler
curvature.Comment: 14 pages, 3 figures. v3: minor clarifications and refs added. JHEP
versio | Cosmological $\alpha$-Attractors and de Sitter Landscape | cosmological $\alpha$-attractors and de sitter landscape | unified cosmological alpha attractors acceleration excellent latest planck data. involves superfields playing distinctive roles determines inflation nilpotent landscape vacua supersymmetry breaking. attractor combining sectors cosmological attractors cosmological interestingly generic inflationary uplifting. couplings inflaton supergravity kahler pages figures. minor clarifications refs added. jhep versio | non_dup | [] |
42657027 | 10.1007/JHEP12(2015)135 | The discovery of colour-kinematics duality has allowed great progress in our
understanding of the UV structure of gravity. However, it has proven difficult
to find numerators which satisfy colour-kinematics duality in certain cases. We
discuss obstacles to building a set of such numerators in the context of the
five-gluon amplitude with all helicities positive at two loops. We are able to
overcome the obstacles by adding more loop momentum to our numerator to
accommodate tension between the values of certain cuts and the symmetries of
certain diagrams. At the same time, we maintain control over the size of our
ansatz by identifying a highly constraining but desirable symmetry property of
our master numerator. The resulting numerators have twelve powers of loop
momenta rather than the seven one would expect from the Feynman rules.Comment: 21 pages + refs, 2 figures, 2 tables + ancillary file; v2 updated
reference | Overcoming Obstacles to Colour-Kinematics Duality at Two Loops | overcoming obstacles to colour-kinematics duality at two loops | discovery colour kinematics duality great progress gravity. proven numerators satisfy colour kinematics duality cases. obstacles numerators gluon helicities loops. overcome obstacles adding numerator accommodate tension cuts symmetries diagrams. maintain ansatz identifying constraining desirable master numerator. numerators twelve powers momenta seven feynman pages refs tables ancillary file updated | non_dup | [] |
42646286 | 10.1007/JHEP12(2015)136 | In this work, the DDF-like approach to the pure spinor cohomology is extended
to the next ghost number level, the so called antifields. In a direct
(supersymmetric) parallel to the bosonic string, some properties of the ghost
number two cohomology are derived with the enlargement of the DDF algebra.
Also, the DDF conjugates of the b ghost zero mode emerge naturally from the
extended algebra and the physical state condition is discussed. Unlike the
bosonic string case, the cohomology analysis of the pure spinor b ghost is
restricted to BRST-closed states.Comment: 54 pages (including review section and two appendices). Comments
added in the Introduction. Published versio | On the field-antifield (a)symmetry of the pure spinor superstring | on the field-antifield (a)symmetry of the pure spinor superstring | spinor cohomology ghost antifields. supersymmetric bosonic ghost cohomology enlargement algebra. conjugates ghost emerge naturally discussed. unlike bosonic cohomology spinor ghost restricted brst pages appendices comments introduction. versio | non_dup | [] |
29561940 | 10.1007/JHEP12(2015)137 | We evaluate the gauge invariant, dynamically conserved charges, recently
obtained from the integral form of the Yang-Mills equations, for the BPS
multi-dyon solutions of a Yang-Mills-Higgs theory associated to any compact
semi-simple gauge group G. Those charges are shown to correspond to the
eigenvalues of the next-to-leading term of the asymptotic form of the Higgs
field at spatial infinity, and so coinciding with the usual topological charges
of those solutions. Such results show that many of the topological charges
considered in the literature are in fact dynamical charges, which conservation
follows from the global properties of classical Yang-Mills theories encoded
into their integral dynamical equations. The conservation of those charges can
not be obtained from the differential form of Yang-Mills equations.Comment: Version to be published in JHEP, Journal of High Energy Physics (19
pages, no figures, some examples added | A remark on the asymptotic form of BPS multi-dyon solutions and their
conserved charges | a remark on the asymptotic form of bps multi-dyon solutions and their conserved charges | dynamically conserved charges mills dyon mills charges eigenvalues asymptotic infinity coinciding usual topological charges solutions. topological charges charges conservation mills encoded equations. conservation charges mills jhep pages | non_dup | [] |
29566853 | 10.1007/JHEP12(2015)138 | Perturbative QCD calculations in the light-cone gauge have long suffered from
the ambiguity associated with the regularization of the poles in the gluon
propagator. In this work we study sub-gauge conditions within the light-cone
gauge corresponding to several known ways of regulating the gluon propagator.
Using the functional integral calculation of the gluon propagator, we rederive
the known sub-gauge conditions for the theta-function gauges and identify the
sub-gauge condition for the principal value (PV) regularization of the gluon
propagator's light-cone poles. The obtained sub-gauge condition for the PV case
is further verified by a sample calculation of the classical Yang-Mills field
of two collinear ultrarelativistic point color charges. Our method does not
allow one to construct a sub-gauge condition corresponding to the well-known
Mandelstam-Leibbrandt prescription for regulating the gluon propagator poles.Comment: 19 pages, 2 figure | Regularization of the Light-Cone Gauge Gluon Propagator Singularities
Using Sub-Gauge Conditions | regularization of the light-cone gauge gluon propagator singularities using sub-gauge conditions | perturbative cone suffered ambiguity regularization poles gluon propagator. cone ways regulating gluon propagator. gluon propagator rederive theta gauges principal regularization gluon propagator cone poles. verified mills collinear ultrarelativistic charges. mandelstam leibbrandt prescription regulating gluon propagator pages | non_dup | [] |
29560846 | 10.1007/JHEP12(2015)139 | The Anti-de Sitter-Reissner-Nordstrom (AdS-RN) black hole in the canonical
ensemble undergoes a phase transition similar to the liquid-gas phase
transition, i.e. the isocharges on the entropy-temperature plane develop an
unstable branch when the charge is smaller than a critical value. It was later
discovered that the isocharges on the entanglement entropy-temperature plane
also exhibit the same van der Waals-like structure, for spherical entangling
regions. In this paper, we present numerical results which sharpen this
similarity between entanglement entropy and black hole entropy, by showing that
both of these entropies obey Maxwell's equal area law to an accuracy of around
1 %. Moreover, we checked this for a wide range of size of the spherical
entangling region, and the equal area law holds independently of the size. We
also checked the equal area law for AdS-RN in 4 and 5 dimensions, so the
conclusion is not specific to a particular dimension. Finally, we repeated the
same procedure for a similar, van der Waals-like transition of the dyonic black
hole in AdS in a mixed ensemble (fixed electric potential and fixed magnetic
charge), and showed that the equal area law is not valid in this case. Thus the
equal area law for entanglement entropy seems to be specific to the AdS-RN
background.Comment: 17 pages, multiple figures. v4: matches published versio | An equal area law for holographic entanglement entropy of the AdS-RN
black hole | an equal area law for holographic entanglement entropy of the ads-rn black hole | sitter reissner nordstrom canonical ensemble undergoes i.e. isocharges unstable branch value. discovered isocharges entanglement exhibit waals spherical entangling regions. sharpen similarity entanglement entropies obey maxwell checked spherical entangling independently size. checked dimension. repeated waals dyonic ensemble valid case. entanglement pages figures. matches versio | non_dup | [] |
29547727 | 10.1007/JHEP12(2015)140 | We consider a supersymmetric Wilson loop operator for 4d N=4 super Yang-Mills
theory which is the natural object dual to the AdS_5 x S^5 superstring in the
AdS/CFT correspondence. It generalizes the traditional bosonic 1/2 BPS
Maldacena-Wilson loop operator and completes recent constructions in the
literature to smooth (non-light-like) loops in the full N=4 non-chiral
superspace. This Wilson loop operator enjoys global superconformal and local
kappa-symmetry of which a detailed discussion is given. Moreover, the
finiteness of its vacuum expectation value is proven at leading order in
perturbation theory. We determine the leading vacuum expectation value for
general paths both at the component field level up to quartic order in
anti-commuting coordinates and in the full non-chiral superspace in suitable
gauges. Finally, we discuss loops built from quadric splines joined in such a
way that the path derivatives are continuous at the intersection.Comment: 44 pages. v2 Added some clarifying comments. Matches the published
versio | Smooth Wilson Loops in N=4 Non-Chiral Superspace | smooth wilson loops in n=4 non-chiral superspace | supersymmetric wilson super mills superstring correspondence. generalizes traditional bosonic maldacena wilson completes constructions loops chiral superspace. wilson enjoys superconformal kappa given. finiteness expectation proven perturbation theory. expectation paths quartic commuting chiral superspace gauges. loops built quadric splines joined derivatives pages. clarifying comments. matches versio | non_dup | [] |
42637088 | 10.1007/JHEP12(2015)141 | We perform a detailed study of the Yangian symmetry of smooth supersymmetric
Maldacena-Wilson loops in planar N=4 super Yang-Mills theory. This hidden
symmetry extends the global superconformal symmetry present for these
observables. A gauge-covariant action of the Yangian generators on the Wilson
line is established that generalizes previous constructions built upon path
variations. Employing these generators the Yangian symmetry is proven for
general paths in non-chiral N=4 superspace at the first perturbative order. The
bi-local piece of the level-one generators requires the use of a regulator due
to divergences in the coincidence limit. We perform regularization by point
splitting in detail, thereby constructing additional local and boundary
contributions as regularization for all level-one Yangian generators. Moreover,
the Yangian algebra at level one is checked and compatibility with local
kappa-symmetry is established. Finally, the consistency of the Yangian symmetry
is shown to depend on two properties: The vanishing of the dual Coxeter number
of the underlying superconformal algebra and the existence of a novel
superspace "G-identity" for the gauge field theory. This tightly constrains the
conformal gauge theories to which integrability can possibly apply.Comment: 44 pages, 2 figures. v2: small comments added, version to be
published in JHE | Integrability of Smooth Wilson Loops in N=4 Superspace | integrability of smooth wilson loops in n=4 superspace | yangian supersymmetric maldacena wilson loops planar super mills theory. hidden extends superconformal observables. covariant yangian generators wilson generalizes constructions built variations. employing generators yangian proven paths chiral superspace perturbative order. piece generators regulator divergences coincidence limit. regularization splitting thereby constructing regularization yangian generators. yangian checked compatibility kappa established. consistency yangian vanishing coxeter superconformal superspace theory. tightly constrains conformal integrability possibly pages figures. comments | non_dup | [] |
42639525 | 10.1007/JHEP12(2015)143 | We discuss constraints imposed by soft limits for effective field theories
arising from symmetry breaking. In particular, we consider those associated
with anomalous conformal symmetry as well as duality symmetries in
supergravity. We verify these soft theorems for the dilaton effective action
relevant for the a-theorem, as well as the one-loop effective action for N=4
supergravity. Using the universality of leading transcendental coefficients in
the alpha' expansion of string theory amplitudes, we study the matrix elements
of operator R^4 with half maximal supersymmetry. We construct the non-linear
completion of R^4 that satisfies both single and double soft theorems up to
seven points. This supports the existence of duality invariant completion of
R^4.Comment: 32 pages, 2 figures; v2: minor modifications, published versio | Soft theorems from anomalous symmetries | soft theorems from anomalous symmetries | imposed arising breaking. anomalous conformal duality symmetries supergravity. verify theorems dilaton supergravity. universality transcendental alpha amplitudes maximal supersymmetry. completion satisfies theorems seven points. supports duality completion pages minor modifications versio | non_dup | [] |
29563328 | 10.1007/JHEP12(2015)145 | We show that the system of $k$ NS5-branes wrapping $\mathbb{T}^4\times S^1$
has non-trivial vacuum structure. Different vacua have different spectra of 1/4
BPS states that carry momentum and winding around the $S^1$. In one vacuum,
such states are described by black holes; in another, they can be thought of as
perturbative BPS states in Double Scaled Little String Theory. In general, both
kinds of states are present. We compute the degeneracy of perturbative BPS
states exactly, and show that it differs from that of the corresponding black
holes. We comment on the implication of our results to the black hole
microstate program, UV/IR mixing in Little String Theory, string
thermodynamics, the string/black hole transition, and other issues.Comment: 53 pages, 3 figure | Three-Charge Black Holes and Quarter BPS States in Little String Theory | three-charge black holes and quarter bps states in little string theory | branes wrapping mathbb trivial structure. vacua carry winding holes thought perturbative scaled theory. kinds present. degeneracy perturbative differs holes. comment implication microstate thermodynamics pages | non_dup | [] |
29558181 | 10.1007/JHEP12(2015)146 | In the background of a charged AdS black hole, we consider a Dirac particle
endowed with an arbitrary magnetic dipole moment. For non-zero charge and
dipole coupling of the bulk fermion, we find that the dual boundary theory can
be plagued with superluminal modes. Requiring consistency of the dual CFT
amounts to constraining the strength of the dipole coupling by an upper bound.
We briefly discuss the implications of our results for the physics of
holographic non-Fermi liquids.Comment: 13 pages, 4 figures, revised version with WKB analysis added,
accepted for publication to JHE | Fermion Dipole Moment and Holography | fermion dipole moment and holography | dirac endowed dipole moment. dipole fermion plagued superluminal modes. requiring consistency amounts constraining dipole bound. briefly holographic fermi pages revised publication | non_dup | [] |
42651307 | 10.1007/JHEP12(2015)147 | We study supersymmetric deformations of N = 4 quantum mechanics with a Kahler
target space admitting a holomorphic isometry. We show that the twisted mass
deformation generalises to a deformation constructed from matrix-valued
functions of the moment map, which obey the Nahm equations. We also explain how
N = 4 supersymmetry implies that the Berry connection on the vacuum bundle for
this theory satisfies the BPS monopole equations. In the case where the target
space is a Riemann sphere, our analysis reduces to the standard Nahm
construction of monopoles. This generalises an earlier result by Sonner and
Tong to the case of monopoles of magnetic charge greater than one.Comment: 12 pages. v2: minor edit | Berry's connection, K\"ahler geometry and the Nahm construction of
monopoles | berry's connection, k\"ahler geometry and the nahm construction of monopoles | supersymmetric deformations mechanics kahler admitting holomorphic isometry. twisted deformation generalises deformation valued moment obey nahm equations. supersymmetry berry connection bundle satisfies monopole equations. riemann sphere reduces nahm monopoles. generalises sonner tong monopoles pages. minor edit | non_dup | [] |
29563033 | 10.1007/JHEP12(2015)148 | We investigate a particular version of the Peccei-Quinn (PQ) NMSSM
characterized by an economical and rigidly hierarchical flavor structure and
based on flavored gauge mediation and on some considerations inspired by string
theory GUTs. In this way we can express the Lagrangian of the PQ NMSSM through
very few parameters. The obtained model is studied numerically and confronted
with the most relevant phenomenological constraints. We show that typical
spectra are for the most part too heavy to be significantly probed at the LHC,
but regions of the parameter space exist yielding signatures that might
possibly be observed during Run II. We also calculate the fine tuning of the
model. We show that, in spite of the appearance of large scales in the
superpotential and soft terms, it does not exceed the tuning present in the
MSSM for equivalent spectra, which is of the order of 10^4.Comment: 23 pages, 3 figures. Some clarifications added to the text, JHEP
published versio | Flavored gauge mediation in the Peccei-Quinn NMSSM | flavored gauge mediation in the peccei-quinn nmssm | peccei quinn nmssm economical rigidly hierarchical flavor flavored mediation considerations inspired guts. express lagrangian nmssm parameters. numerically confronted phenomenological constraints. probed yielding signatures possibly fine tuning model. spite appearance superpotential exceed tuning mssm pages figures. clarifications jhep versio | non_dup | [] |
29552174 | 10.1007/JHEP12(2015)149 | An appealing explanation for the Planck data is provided by inflationary
models with a singular non-canonical kinetic term: a Laurent expansion of the
kinetic function translates into a potential with a nearly shift-symmetric
plateau in canonical fields. The shift symmetry can be broken at large field
values by including higher-order poles, which need to be hierarchically
suppressed in order not to spoil the inflationary plateau. The herefrom
resulting corrections to the inflationary dynamics and predictions are shown to
be universal at lowest order and possibly to induce power loss at large angular
scales. At lowest order there are no corrections from a pole of just one order
higher and we argue that this phenomenon is related to the well-known extended
no-scale structure arising in string theory scenarios. Finally, we outline
which other corrections may arise from string loop effects.Comment: twocolumn, 9 pages, 1 figure; v2: clarifications and refs added, JHEP
layout, 19 page | Pole Inflation - Shift Symmetry and Universal Corrections | pole inflation - shift symmetry and universal corrections | appealing explanation planck inflationary singular canonical laurent translates nearly plateau canonical fields. broken poles hierarchically suppressed spoil inflationary plateau. herefrom inflationary universal possibly induce scales. pole argue phenomenon arising scenarios. outline arise twocolumn pages clarifications refs jhep layout | non_dup | [] |
29550835 | 10.1007/JHEP12(2015)150 | We compute the leading double-soft behavior for gluons and for the scalars
obtained by dimensional reduction of a higher dimensional pure gauge theory,
from the scattering amplitudes of gluons and scalars living in the world-volume
of a Dp-brane of the bosonic string. In the case of gluons, we compute both the
double-soft behavior when the two soft gluons are contiguous as well as when
they are not contiguous. From our results, that are valid in string theory, one
can easily get the double-soft limit in gauge field theory by sending the
string tension to infinity.Comment: 25 pages, 1 figur | Double-soft behavior for scalars and gluons from string theory | double-soft behavior for scalars and gluons from string theory | gluons scalars amplitudes gluons scalars living brane bosonic string. gluons gluons contiguous contiguous. valid sending tension pages figur | non_dup | [] |
42639554 | 10.1007/JHEP12(2015)151 | We explore the phenomenology of scalar fields in the adjoint representation
of SM gauge groups. We write a general set of dimension 5 effective operators
in which SM adjoint scalars couple to pairs of standard model bosons. Using
these effective operators, we explore new possible decay channels of a scalar
color octet into a gluon and a Z boson/ gluon and a photon. We recast several
analyses from Run I of the LHC to find constraints on an a scalar octet
decaying into these channels, and we project the discovery potential of color
octets in our gluon+photon channel for the 14 TeV run of LHC.Comment: 14 pages, 8 figures, 1 tabl | Searching for Standard Model Adjoint Scalars with Diboson Resonance
Signatures | searching for standard model adjoint scalars with diboson resonance signatures | explore phenomenology adjoint groups. adjoint scalars couple bosons. explore octet gluon boson gluon photon. recast octet decaying discovery octets gluon pages tabl | non_dup | [] |
42655822 | 10.1007/JHEP12(2015)152 | We perform a general analysis of axionic dark radiation produced from the
decay of the lightest modulus in the sequestered LARGE Volume Scenario. We
discuss several cases depending on the form of the Kahler metric for visible
sector matter fields and the mechanism responsible for achieving a de Sitter
vacuum. The leading decay channels which determine dark radiation predictions
are to hidden sector axions, visible sector Higgses and SUSY scalars depending
on their mass. We show that in most of the parameter space of split SUSY-like
models squarks and sleptons are heavier than the lightest modulus. Hence dark
radiation predictions previously obtained for MSSM-like cases hold more
generally also for split SUSY-like cases since the decay channel to SUSY
scalars is kinematically forbidden. However the inclusion of string loop
corrections to the Kahler potential gives rise to a parameter space region
where the decay channel to SUSY scalars opens up, leading to a significant
reduction of dark radiation production. In this case, the simplest model with a
shift-symmetric Higgs sector can suppress the excess of dark radiation $\Delta
N_{eff}$ to values as small as 0.14, in perfect agreement with current
experimental bounds. Depending on the exact mass of the SUSY scalars all values
in the range 0.14 $\lesssim \Delta N_{eff} \lesssim$ 1.6 are allowed.
Interestingly dark radiation overproduction can be avoided also in the absence
of a Giudice-Masiero coupling.Comment: 30 pages, 5 figure | General Analysis of Dark Radiation in Sequestered String Models | general analysis of dark radiation in sequestered string models | axionic lightest modulus sequestered scenario. kahler visible achieving sitter vacuum. hidden axions visible higgses susy scalars mass. split susy squarks sleptons heavier lightest modulus. mssm hold split susy susy scalars kinematically forbidden. inclusion kahler susy scalars opens production. simplest suppress excess delta perfect bounds. susy scalars lesssim delta lesssim allowed. interestingly overproduction avoided giudice masiero pages | non_dup | [] |
29565024 | 10.1007/JHEP12(2015)154 | We introduce a new class of Composite Higgs models in which electroweak
symmetry is broken by a seesaw-like mechanism. If a global symmetry is broken
sequentially at different scales, two sets of pseudo-Goldstone bosons will
arise, one set being typically heavier than the other. If two Composite Higgs
doublets mix, then the mass-squared of the lighter state can be driven
negative, and induce EWSB. We illustrate with the example $SO(6) \rightarrow
SO(5) \rightarrow SO(4)$, and derive an estimate of the light Higgs potential.
We find that the introduction of an extra scale can ease many of the tensions
present in conventional Composite Higgs models, especially those related to
fine-tuning. In particular we find that we can significantly raise the upper
bound on the mass of the elusive top partners.Comment: 19 pages, 2 figures. v2: JHEP version, mistake corrected, discussion
on tuning and top-partners extende | Composite Higgses with seesaw EWSB | composite higgses with seesaw ewsb | composite electroweak broken seesaw mechanism. broken sequentially pseudo goldstone bosons arise heavier other. composite doublets squared lighter induce ewsb. illustrate rightarrow rightarrow derive potential. extra ease tensions composite fine tuning. raise elusive pages figures. jhep mistake corrected tuning partners extende | non_dup | [] |
29551857 | 10.1007/JHEP12(2015)155 | Some known constraints on Renormalization Group flow take the form of
inequalities: in even dimensions they refer to the coefficient $a$ of the Weyl
anomaly, while in odd dimensions to the sphere free energy $F$. In recent work
arXiv:1409.1937 it was suggested that the $a$- and $F$-theorems may be viewed
as special cases of a Generalized $F$-Theorem valid in continuous dimension.
This conjecture states that, for any RG flow from one conformal fixed point to
another, $\tilde F_{\rm UV} > \tilde F_{\rm IR}$, where $\tilde F=\sin (\pi
d/2)\log Z_{S^d}$. Here we provide additional evidence in favor of the
Generalized $F$-Theorem. We show that it holds in conformal perturbation
theory, i.e. for RG flows produced by weakly relevant operators. We also study
a specific example of the Wilson-Fisher $O(N)$ model and define this CFT on the
sphere $S^{4-\epsilon}$, paying careful attention to the beta functions for the
coefficients of curvature terms. This allows us to develop the $\epsilon$
expansion of $\tilde F$ up to order $\epsilon^5$. Pade extrapolation of this
series to $d=3$ gives results that are around $2-3\%$ below the free field
values for small $N$. We also study RG flows which include an anisotropic
perturbation breaking the $O(N)$ symmetry; we again find that the results are
consistent with $\tilde F_{\rm UV} > \tilde F_{\rm IR}$.Comment: 41 pages, 7 figures. v3: minor improvement | Generalized $F$-Theorem and the $\epsilon$ Expansion | generalized $f$-theorem and the $\epsilon$ expansion | renormalization inequalities weyl anomaly sphere theorems viewed valid dimension. conjecture conformal tilde tilde tilde favor theorem. conformal perturbation i.e. flows weakly operators. wilson fisher sphere epsilon paying careful beta curvature terms. epsilon tilde epsilon pade extrapolation flows anisotropic perturbation breaking tilde tilde .comment pages figures. minor | non_dup | [] |
29531401 | 10.1007/JHEP12(2015)156 | We consider four dimensional CHL models with sixteen spacetime
supersymmetries obtained from orbifolds of type IIA superstring on K3 x T^2 by
a Z_N symmetry acting (possibly) non-geometrically on K3. We show that most of
these models (in particular, for geometric symmetries) are self-dual under a
weak-strong duality acting on the heterotic axio-dilaton modulus S by a "Fricke
involution" S --> -1/NS. This is a novel symmetry of CHL models that lies
outside of the standard SL(2,Z)-symmetry of the parent theory, heterotic
strings on T^6. For self-dual models this implies that the lattice of purely
electric charges is N-modular, i.e. isometric to its dual up to a rescaling of
its quadratic form by N. We verify this prediction by determining the lattices
of electric and magnetic charges in all relevant examples. We also calculate
certain BPS-saturated couplings and verify that they are invariant under the
Fricke S-duality. For CHL models that are not self-dual, the strong coupling
limit is dual to type IIA compactified on T^6/Z_N, for some Z_N-symmetry
preserving half of the spacetime supersymmetries.Comment: 56 pages, 3 figures; v3: some minor mistakes correcte | Fricke S-duality in CHL models | fricke s-duality in chl models | sixteen spacetime supersymmetries orbifolds superstring acting possibly geometrically geometric symmetries duality acting heterotic axio dilaton modulus fricke involution lies parent heterotic strings purely charges modular i.e. isometric rescaling quadratic verify determining lattices charges examples. saturated couplings verify fricke duality. compactified preserving spacetime pages minor mistakes correcte | non_dup | [] |
29568890 | 10.1007/JHEP12(2015)157 | We study $5d$ gauge theories that go in the UV to $6d$ $\mathcal{N}$$=(1,0)$
SCFT. We focus on these theories that can be engineered in string theory by
brane webs. Given a theory in this class, we propose a method to determine the
$6d$ SCFT it goes to. We also discuss the implication of this to the
compactification of the resulting $6d$ SCFT on a torus to $4d$. We test and
demonstrate this method with a variety of examples.Comment: 61 pages, 51 figures; v2 typos corrected, version published in JHE | Brane webs, $5d$ gauge theories and $6d$ $\mathcal{N}$$=(1,0)$ SCFT's | brane webs, $5d$ gauge theories and $6d$ $\mathcal{n}$$=(1,0)$ scft's | mathcal scft. engineered brane webs. propose scft goes implication compactification scft torus pages typos corrected | non_dup | [] |
29546610 | 10.1007/JHEP12(2015)161 | We study confinement-deconfinement phase transition for heavy quarks in a
bottom-up holographic QCD model. We consider a black hole background in an
Einstein-Maxwell-scalar system and add probe open strings to the background.
Combining the various configurations of the open strings and the phase
structure of the black hole background itself, we obtain the
confinement-deconfinement phase diagram for heavy quarks in the holographic QCD
model.Comment: 23 pages, 14 figures, published in JHEP. arXiv admin note: text
overlap with arXiv:1301.038 | Confinement-Deconfinment Phase Transition for Heavy Quarks | confinement-deconfinment phase transition for heavy quarks | confinement deconfinement quarks holographic model. einstein maxwell strings background. combining configurations strings confinement deconfinement quarks holographic pages jhep. admin overlap | non_dup | [] |
29567708 | 10.1007/JHEP12(2015)162 | We study how, as a result of the scanning of supersymmetry breaking during
the cosmological evolution, a relaxation mechanism can naturally determine a
hierarchy between the weak scale and the masses of supersymmetric particles.
Supersymmetry breaking is determined by QCD instanton effects, in an extremely
minimal setup in which a single field drives the relaxation and breaks
supersymmetry. Since gauginos are lighter than the other supersymmetric
particles by a one-loop factor, the theory is a realisation of Split
Supersymmetry free from the naturalness problem.Comment: 38 pages, 3 figures, version published in JHE | Natural Heavy Supersymmetry | natural heavy supersymmetry | scanning supersymmetry breaking cosmological relaxation naturally hierarchy supersymmetric particles. supersymmetry breaking instanton extremely setup drives relaxation breaks supersymmetry. gauginos lighter supersymmetric realisation split supersymmetry naturalness pages | non_dup | [] |
42653584 | 10.1007/JHEP12(2015)164 | Applying the Ashok-Denef-Douglas estimation method to elliptic Calabi-Yau
fourfolds suggests that a single elliptic fourfold ${\cal M}_{\rm max}$ gives
rise to ${\cal O} (10^{272,000})$ F-theory flux vacua, and that the sum total
of the numbers of flux vacua from all other F-theory geometries is suppressed
by a relative factor of ${\cal O} (10^{-3000})$. The fourfold ${\cal M}_{\rm
max}$ arises from a generic elliptic fibration over a specific toric threefold
base $B_{\rm max}$, and gives a geometrically non-Higgsable gauge group of
$E_8^9 \times F_4^8 \times (G_2 \times SU(2))^{16}$, of which we expect some
factors to be broken by G-flux to smaller groups. It is not possible to tune an
$SU(5)$ GUT group on any further divisors in ${\cal M}_{\rm max}$, or even an
$SU(2)$ or $SU(3)$, so the standard model gauge group appears to arise in this
context only from a broken $E_8$ factor. The results of this paper can either
be interpreted as providing a framework for predicting how the standard model
arises most naturally in F-theory and the types of dark matter to be found in a
typical F-theory compactification, or as a challenge to string theorists to
explain why other choices of vacua are not exponentially unlikely compared to
F-theory compactifications on ${\cal M}_{\rm max}$.Comment: 19 pages, 2 figures, v3: minor corrections, clarifications,
references adde | The F-theory geometry with most flux vacua | the f-theory geometry with most flux vacua | ashok denef douglas elliptic calabi fourfolds elliptic fourfold vacua vacua geometries suppressed fourfold arises generic elliptic fibration toric threefold geometrically higgsable broken groups. tune divisors arise broken factor. interpreted predicting arises naturally compactification challenge theorists choices vacua exponentially unlikely compactifications .comment pages minor clarifications adde | non_dup | [] |
42637101 | 10.1007/JHEP12(2015)165 | If kinematically accessible, hadron collider experiments provide an ideal
laboratory for the direct production of heavy lepton partners in Seesaw models.
In the context of the Type III Seesaw Mechanism, the $\mathcal{O}(\alpha_s)$
rate and shape corrections are presented for the pair production of
hypothetical, heavy $SU(2)_L$ triplet leptons in $pp$ collisions at $\sqrt{s}=$
13, 14, and 100 TeV. The next-to-leading order (NLO) $K$-factors span,
approximately, $K^{NLO}=1.1 - 1.4$ for both charged current and neutral current
processes over a triplet mass range $m_T = 100~\text{GeV}-2~\text{TeV}$. Total
production cross sections exhibit a $^{+5\%}_{-6\%}$ scale dependence at 14 TeV
and $\pm1\%$ at 100 TeV. The NLO differential $K$-factors for heavy lepton
kinematics are largely flat, suggesting that na\"ive scaling by the total
$K^{NLO}$ is reasonably justified. The resummed transverse momentum
distribution of the dilepton system is presented at leading logarithmic (LL)
accuracy. The effects of resummation are large in TeV-scale dilepton systems.
Discovery potential to heavy lepton pairs at 14 and 100 TeV is briefly
explored: At the High-Luminosity LHC, we estimate a $4.8-6.3\sigma$ discovery
potential maximally for $m_T = 1.5-1.6~\text{TeV}$ after 3000 fb$^{-1}$. With
300 (3000) fb$^{-1}$, there is $2\sigma$ sensitivity up to $m_T =
1.3-1.4~\text{TeV}~(1.7-1.8~\text{TeV})$ in the individual channels. At 100 TeV
and with 10 fb$^{-1}$, a $5\sigma$ discovery can be achieved for
$m_T=1.4-1.6~\text{TeV}$. Due to the factorization properties of Drell-Yan-type
systems, the fixed order and resummed calculations reduce to convolutions over
tree-level quantities.Comment: 30 pages in JHEP template. Published version, references add, text
unchanged. Have a good da | QCD Corrections to Pair Production of Type III Seesaw Leptons at Hadron
Colliders | qcd corrections to pair production of type iii seesaw leptons at hadron colliders | kinematically accessible hadron collider ideal lepton partners seesaw models. seesaw mathcal alpha hypothetical triplet leptons collisions sqrt tev. span neutral triplet exhibit tev. lepton kinematics largely reasonably justified. resummed dilepton logarithmic accuracy. resummation dilepton systems. discovery lepton briefly explored luminosity sigma discovery maximally sigma channels. sigma discovery factorization drell resummed convolutions pages jhep template. unchanged. | non_dup | [] |
29535504 | 10.1007/JHEP12(2015)166 | We study the prospects for long-lived charged particle (LLCP) searches at
current and future LHC runs and at a 100 TeV pp collider, using Drell-Yan
slepton pair production as an example. Because momentum measurements become
more challenging for very energetic particles, we carefully treat the expected
momentum resolution. At the same time, a novel feature of 100 TeV collisions is
the significant energy loss of energetic muons in detectors. We use this to
help discriminate between muons and LLCPs. We find that the 14 TeV LHC with an
integrated luminosity of 3 ab$^{-1}$ can probe LLCP slepton masses up to 1.2
TeV, and a 100 TeV pp collider with 3 ab$^{-1}$ can probe LLCP slepton masses
up to 4 TeV, using time-of-flight measurements. These searches will have
striking implications for dark matter, with the LHC definitively testing the
possibility of slepton-neutralino co-annihilating WIMP dark matter, and with
the LHC and future hadron colliders having a strong potential for discovering
LLCPs in models with superWIMP dark matter.Comment: 24 pages, 9 figures, revised to match published versio | Long-Lived Sleptons at the LHC and a 100 TeV Proton Collider | long-lived sleptons at the lhc and a 100 tev proton collider | prospects lived llcp searches runs collider drell slepton example. challenging energetic carefully treat resolution. collisions energetic muons detectors. discriminate muons llcps. luminosity llcp slepton collider llcp slepton flight measurements. searches striking definitively slepton neutralino annihilating wimp hadron colliders discovering llcps superwimp pages revised match versio | non_dup | [] |
29570391 | 10.1007/JHEP12(2015)167 | The Standard Model gauge group can be extended with minimal matter content by
introducing anomaly free U(1) symmetry, such as $L_e-L_{\mu}$ or
$L_e-L_{\tau}$. If the neutral gauge boson corresponding to this abelian
symmetry is ultra-light, then it will give rise to flavor-dependent long-range
leptonic force, which can have significant impact on neutrino oscillations. For
an instance, the electrons inside the Sun can generate a flavor-dependent
long-range potential at the Earth surface, which can suppress the $\nu_{\mu}
\to \nu_e$ appearance probability in terrestrial experiments. The sign of this
potential is opposite for anti-neutrinos, and affects the oscillations of
(anti-)neutrinos in different fashion. This feature invokes fake CP-asymmetry
like the SM matter effect and can severely affect the leptonic CP-violation
searches in long-baseline experiments. In this paper, we study in detail the
possible impacts of these long-range flavor-diagonal neutral current
interactions due to $L_e-L_{\mu}$ symmetry, when (anti-)neutrinos travel from
Fermilab to Homestake (1300 km) and CERN to Pyh\"asalmi (2290 km) in the
context of future high-precision superbeam facilities, DUNE and LBNO
respectively. If there is no signal of long-range force, DUNE (LBNO) can place
stringent constraint on the effective gauge coupling $\alpha_{e\mu} < 1.9
\times 10^{-53}~(7.8 \times 10^{-54})$ at 90% C.L., which is almost 30 (70)
times better than the existing bound from the Super-Kamiokande experiment. We
also observe that if $\alpha_{e\mu} \geq 2 \times 10^{-52}$, the CP-violation
discovery reach of these future facilities vanishes completely. The mass
hierarchy measurement remains robust in DUNE (LBNO) if $\alpha_{e\mu} < 5
\times 10^{-52}~(10^{-52})$.Comment: 44 pages, 54 pdf figures, 7 tables. Published in JHE | Exploring Flavor-Dependent Long-Range Forces in Long-Baseline Neutrino
Oscillation Experiments | exploring flavor-dependent long-range forces in long-baseline neutrino oscillation experiments | introducing anomaly neutral boson abelian ultra flavor leptonic oscillations. flavor earth suppress appearance terrestrial experiments. opposite neutrinos affects oscillations neutrinos fashion. invokes fake asymmetry severely leptonic violation searches experiments. impacts flavor diagonal neutral neutrinos travel fermilab homestake cern asalmi precision superbeam facilities dune lbno respectively. dune lbno stringent alpha c.l. super kamiokande experiment. alpha violation discovery facilities vanishes completely. hierarchy robust dune lbno alpha .comment pages tables. | non_dup | [] |
29559478 | 10.1007/JHEP12(2015)168 | The entanglement entropy of a generic $d$-dimensional conformal field theory
receives a regulator independent contribution when the entangling region
contains a (hyper)conical singularity of opening angle $\Omega$, codified in a
function $a^{(d)}(\Omega)$. In arXiv:1505.04804, we proposed that for
three-dimensional conformal field theories, the coefficient $\sigma$
characterizing the smooth surface limit of such contribution
($\Omega\rightarrow \pi$) equals the stress tensor two-point function charge
$C_{ T}$, up to a universal constant. In this paper, we prove this relation for
general three-dimensional holographic theories, and extend the result to
general dimensions. In particular, we show that a generalized coefficient
$\sigma^{ (d)}$ can be defined for (hyper)conical entangling regions in the
almost smooth surface limit, and that this coefficient is universally related
to $C_{ T}$ for general holographic theories, providing a general formula for
the ratio $\sigma^{ (d)}/C_{ T}$ in arbitrary dimensions. We conjecture that
the latter ratio is universal for general CFTs. Further, based on our recent
results in arXiv:1507.06997, we propose an extension of this relation to
general R\'enyi entropies, which we show passes several consistency checks in
$d=4$ and $d=6$.Comment: 22 pages, 3 figures, 2 tables; v3: minor modifications to match
published version, references adde | Universal entanglement for higher dimensional cones | universal entanglement for higher dimensional cones | entanglement generic conformal receives regulator entangling hyper conical singularity opening omega codified omega conformal sigma characterizing omega rightarrow equals universal constant. holographic extend dimensions. sigma hyper conical entangling universally holographic sigma dimensions. conjecture universal cfts. propose enyi entropies passes consistency checks .comment pages tables minor modifications match adde | non_dup | [] |
29565907 | 10.1007/JHEP12(2015)169 | We perform an updated analysis for the one-loop induced lepton flavor
violating radiative decays $l_i \to l_j \gamma$ in an extended mirror model.
Mixing effects of the neutrinos and charged leptons constructed with a
horizontal $A_4$ symmetry are also taken into account. Current experimental
limit and projected sensitivity on the branching ratio of $\mu \to e \gamma$
are used to constrain the parameter space of the model. Calculations of two
related observables, the electric and magnetic dipole moments of the leptons,
are included. Implications concerning the possible detection of mirror leptons
at the LHC and the ILC are also discussed.Comment: 9 figures, 36 single-side pages. Updated email addresses and
referenc | Lepton Flavor Violating Radiative Decays in EW-Scale $\nu_R$ Model: An
Update | lepton flavor violating radiative decays in ew-scale $\nu_r$ model: an update | updated lepton flavor violating radiative decays gamma mirror model. neutrinos leptons account. projected branching gamma constrain model. observables dipole moments leptons included. concerning mirror leptons pages. updated email addresses referenc | non_dup | [] |
42655770 | 10.1007/JHEP12(2015)170 | We present an attempt to formulate an action for the worldvolume theory of a
single M5-brane, based on the splitting of the six worldvolume directions into
2+4, which breaks manifest Lorentz invariance from $SO(1,5)$ to $SO(1,1)\times
SO(4)$. To this end, an action for the free six--dimensional (2,0) chiral
tensor multiplet, and separately, a nonlinearly interacting chiral 2-form
action are constructed. By studying the Lagrangian formulation for the chiral
2-form with 2+4 splitting, it is suggested that, if exists, the modified
diffeomorphism of the theory on curved six--dimensional space--time is less
trivial than its 1+5 and 3+3 counterpart, thus hindering the coupling of the
chiral 2-form to the induced metric on the worldvolume of the M5-brane. We
discuss difficulties of further generalisation of the theory. Finally, in terms
of Hamiltonian analysis, we show that the naively gauge-fixed
failed-PST-covariantised Lagrangian has the correct number of degrees of
freedom, and satisfies the hyper--surface deformation algebra.Comment: 27 pages, no figur | Towards 2+4 formulation of M5-brane | towards 2+4 formulation of m5-brane | attempt formulate worldvolume brane splitting worldvolume directions breaks manifest lorentz invariance chiral multiplet separately nonlinearly interacting chiral constructed. studying lagrangian formulation chiral splitting diffeomorphism curved trivial counterpart hindering chiral worldvolume brane. difficulties generalisation theory. naively failed covariantised lagrangian freedom satisfies hyper deformation pages figur | non_dup | [] |
29537301 | 10.1007/JHEP12(2015)171 | We numerically construct asymptotically anti-de Sitter (AdS) black holes in
four dimensions that contain only a single Killing vector field. These
solutions, which we coin black resonators, link the superradiant instability of
Kerr-AdS to the nonlinear weakly turbulent instability of AdS by connecting the
onset of the superradiance instability to smooth, horizonless geometries called
geons. Furthermore, they demonstrate non-uniqueness of Kerr-AdS by sharing
asymptotic charges. Where black resonators coexist with Kerr-AdS, we find that
the black resonators have higher entropy. Nevertheless, we show that black
resonators are unstable and comment on the implications for the endpoint of the
superradiant instability.Comment: 5 pages, 4 figure | Black holes with a single Killing vector field: black resonators | black holes with a single killing vector field: black resonators | numerically asymptotically sitter holes killing field. coin resonators superradiant instability kerr weakly turbulent instability connecting onset superradiance instability horizonless geometries geons. uniqueness kerr sharing asymptotic charges. resonators coexist kerr resonators entropy. nevertheless resonators unstable comment endpoint superradiant pages | non_dup | [] |
29534442 | 10.1007/JHEP12(2015)172 | In this study we explore the LHC's Run II potential to the discovery of heavy
Majorana neutrinos, with luminosities between $30$ and $3000$ fb$^{-1}$ in the
$l^{\pm}l^{\pm}j~j$ final state. Given that there exist many models for
neutrino mass generation, even within the Type I seesaw framework, we use a
simplified model approach and study two simple extensions to the Standard
Model, one with a single heavy Majorana neutrino, singlet under the Standard
Model gauge group, and a limiting case of the left-right symmetric model. We
then extend the analysis to a future hadron collider running at $100$ TeV
center of mass energies. This extrapolation in energy allows us to study the
relative importance of the resonant production versus gauge boson fusion
processes in the study of Majorana neutrinos at hadron colliders. We analyze
and propose different search strategies designed to maximize the discovery
potential in either the resonant production or the gauge boson fusion modes | Search for Heavy Right-Handed Neutrinos at the LHC and Beyond in the
Same-Sign Same-Flavor Leptons Final State | search for heavy right-handed neutrinos at the lhc and beyond in the same-sign same-flavor leptons final state | explore discovery majorana neutrinos luminosities state. seesaw simplified extensions majorana singlet limiting model. extend hadron collider running energies. extrapolation resonant boson fusion majorana neutrinos hadron colliders. analyze propose maximize discovery resonant boson fusion | non_dup | [] |
29549299 | 10.1007/JHEP12(2015)173 | We give here a list of exact classical solutions of a large class of weakly
nonlocal theories of gravity, which are unitary and super-renormalizable (or
finite) at quantum level. It is explicitly shown that flat and Ricci-flat
spacetimes as well as maximally symmetric manifolds are exact solutions of the
equation of motion. Therefore, well-known physical spacetimes like
Schwarzschild, Kerr, (Anti-) de Sitter serve as solutions for standard matter
content. In dimension higher than four we can also have Anti-de Sitter
solutions in the presence of positive cosmological constant. We pedagogically
show how to obtain these exact solutions. Furthermore, for another version of
the theory, written in the Weyl basis, Friedmann-Robertson-Walker (FRW)
spacetimes are also exact solutions, when the matter content is given by
conformal matter (radiation). We also comment on the presence of singularities
and possible resolution of them in finite and conformally invariant theories.
"Delocalization" is proposed as a way to solve the black hole singularity
problem. In order to solve the problem of cosmological singularities it seems
crucial to have a conformally invariant or asymptotically free quantum
gravitational theory.Comment: 33 page | Exact solutions and spacetime singularities in nonlocal gravity | exact solutions and spacetime singularities in nonlocal gravity | weakly nonlocal unitary super renormalizable level. explicitly ricci spacetimes maximally manifolds motion. spacetimes schwarzschild kerr sitter serve content. sitter cosmological constant. pedagogically solutions. weyl friedmann robertson walker spacetimes conformal comment singularities conformally theories. delocalization solve singularity problem. solve cosmological singularities crucial conformally asymptotically gravitational | non_dup | [] |
29565704 | 10.1007/JHEP12(2015)174 | The moduli space of instantons on an ALE space is studied using the moduli
space of $\mathcal{N}=4$ field theories in three dimensions. For instantons in
a simple gauge group $G$ on $\mathbb{C}^2/\mathbb{Z}_n$, the Hilbert series of
such an instanton moduli space is computed from the Coulomb branch of the
quiver given by the affine Dynkin diagram of $G$ with flavour nodes of unitary
groups attached to various nodes of the Dynkin diagram. We provide a simple
prescription to determine the ranks and the positions of these flavour nodes
from the order of the orbifold $n$ and from the residual subgroup of $G$ that
is left unbroken by the monodromy of the gauge field at infinity. For $G$ a
simply laced group of type $A$, $D$ or $E$, the Higgs branch of such a quiver
describes the moduli space of instantons in projective unitary group $PU(n)
\cong U(n)/U(1)$ on orbifold $\mathbb{C}^2/\hat{G}$, where $\hat{G}$ is the
discrete group that is in McKay correspondence to $G$. Moreover, we present the
quiver whose Coulomb branch describes the moduli space of $SO(2N)$ instantons
on a smooth ALE space of type $A_{2n-1}$ and whose Higgs branch describes the
moduli space of $PU(2n)$ instantons on a smooth ALE space of type $D_{N}$.Comment: 32 pages and a number of figures. Version 2: Improvements on
projective unitary groups and on reference | The moduli space of instantons on an ALE space from 3d $\mathcal{N}=4$
field theories | the moduli space of instantons on an ale space from 3d $\mathcal{n}=4$ field theories | moduli instantons moduli mathcal dimensions. instantons mathbb mathbb hilbert instanton moduli coulomb branch quiver affine dynkin flavour unitary attached dynkin diagram. prescription ranks flavour orbifold residual subgroup unbroken monodromy infinity. laced branch quiver describes moduli instantons projective unitary cong orbifold mathbb mckay correspondence quiver coulomb branch describes moduli instantons branch describes moduli instantons .comment pages figures. improvements projective unitary | non_dup | [] |
42638404 | 10.1007/JHEP12(2015)175 | We consider the quantum mechanics of an even number of space indexed
hermitian matrices. Upon complexification, we show that a closed subsector
naturally parametrized by a matrix valued radial coordinate has a description
in terms of non interacting $s$-state "radial fermions" with an emergent De
Alfaro, Fubini and Furlan type potential, present only for two or more complex
matrices. The concomitant $AdS_2$ symmetry is identified. The large $N$
description in terms of the density of radial eigenvalues is also described.Comment: Citation added; 19 page | De Alfaro, Fubini and Furlan from multi Matrix Systems | de alfaro, fubini and furlan from multi matrix systems | mechanics indexed hermitian matrices. complexification subsector naturally parametrized valued coordinate interacting fermions emergent alfaro fubini furlan matrices. concomitant identified. eigenvalues citation | non_dup | [] |
42648516 | 10.1007/JHEP12(2015)176 | We present an analysis of two different approximations to the scalar field
theory on the fuzzy sphere, a nonperturbative and a perturbative one, which are
both multitrace matrix models. We show that the former reproduces a phase
diagram with correct features in a qualitative agreement with the previous
numerical studies and that the latter gives a phase diagram with features not
expected in the phase diagram of the field theory.Comment: v2 minor typos corrected, references updated, version published in
JHE | Matrix model approximations of fuzzy scalar field theories and their
phase diagrams | matrix model approximations of fuzzy scalar field theories and their phase diagrams | approximations fuzzy sphere nonperturbative perturbative multitrace models. former reproduces qualitative minor typos corrected updated | non_dup | [] |
29552104 | 10.1007/JHEP12(2015)177 | We present a new formula for all single trace tree amplitudes in four
dimensional super Yang-Mills coupled to Einstein supergravity. Like the
Cachazo-He-Yuan formula, our expression is supported on solutions of the
scattering equations, but with momenta written in terms of spinor helicity
variables. Supersymmetry and parity are both manifest. In the pure gravity and
pure Yang-Mills sectors, it reduces to the known twistor-string formulae. We
show that the formula behaves correctly under factorization and sketch how
these amplitudes may be obtained from a four-dimensional (ambi)twistor string.Comment: 14 pages, no figures. v2: erroneous formulae removed, improved
discussion of factorizatio | On tree amplitudes of supersymmetric Einstein-Yang-Mills theory | on tree amplitudes of supersymmetric einstein-yang-mills theory | trace amplitudes super mills einstein supergravity. cachazo yuan momenta spinor helicity variables. supersymmetry parity manifest. mills sectors reduces twistor formulae. behaves correctly factorization sketch amplitudes ambi twistor pages figures. erroneous formulae removed factorizatio | non_dup | [] |
42647995 | 10.1007/JHEP12(2015)179 | We prove a c-theorem for holographic renormalization group flows in a
Schrodinger spacetime that demonstrates that the effective radius L(r)
monotonically decreases from the UV to the IR, where r is the bulk radial
coordinate. This result assumes that the bulk matter satisfies the null energy
condition, but holds regardless of the value of the critical exponent z. We
also construct several numerical examples in a model where the Schrodinger
background is realized by a massive vector coupled to a real scalar. The full
Schrodinger group is realized when z=2, and in this case it is possible to
construct solutions with constant effective z(r)=2 along the entire flow.Comment: 18 pages, 3 figures, footnote on limit cycles added, equation (3.17)
simplifie | A Holographic c-Theorem for Schrodinger Spacetimes | a holographic c-theorem for schrodinger spacetimes | holographic renormalization flows schrodinger spacetime demonstrates monotonically coordinate. assumes satisfies regardless exponent schrodinger realized massive scalar. schrodinger realized pages footnote cycles simplifie | non_dup | [] |
42745852 | 10.1007/JHEP12(2016)001 | The N=3 Kazama-Suzuki model at the `critical' level has been found by
Creutzig, Hikida and Ronne. We construct the lowest higher spin currents of
spins (3/2, 2,2,2,5/2, 5/2, 5/2, 3) in terms of various fermions. In order to
obtain the operator product expansions (OPEs) between these higher spin
currents, we describe three N=2 OPEs between the two N=2 higher spin currents
denoted by (3/2, 2, 2, 5/2) and (2, 5/2, 5/2, 3) (corresponding 36 OPEs in the
component approach). Using the various Jacobi identities, the coefficient
functions appearing on the right hand side of these N=2 OPEs are determined in
terms of central charge completely. Then we describe them as one single N=3 OPE
in the N=3 superspace. The right hand side of this N=3 OPE contains the
SO(3)-singlet N=3 higher spin multiplet of spins (2, 5/2, 5/2, 5/2, 3,3,3,
7/2), the SO(3)-singlet N=3 higher spin multiplet of spins (5/2, 3,3,3, 7/2,
7/2, 7/2, 4), and the SO(3)-triplet N=3 higher spin multiplets where each
multiplet has the spins (3, 7/2, 7/2, 7/2, 4,4,4, 9/2), in addition to N=3
superconformal family of the identity operator. Finally, by factoring out the
spin-1/2 current of N=3 linear superconformal algebra generated by eight
currents of spins (1/2, 1,1,1, 3/2, 3/2, 3/2, 2), we obtain the extension of
so-called SO(3) nonlinear Knizhnik Bershadsky algebra.Comment: 71 pages; The second-fourth paragraphs in page 31 and Appendix H
added and to appear in JHE | Higher Spin Currents in the Enhanced N=3 Kazama-Suzuki Model | higher spin currents in the enhanced n=3 kazama-suzuki model | kazama suzuki creutzig hikida ronne. currents spins fermions. expansions opes currents opes currents denoted opes jacobi identities appearing opes completely. superspace. singlet multiplet spins singlet multiplet spins triplet multiplets multiplet spins superconformal operator. factoring superconformal eight currents spins knizhnik bershadsky pages fourth paragraphs | non_dup | [] |
73376885 | 10.1007/JHEP12(2016)002 | We explain how a vanishing, or truncated, perturbative expansion, such as
often arises in semi-classically tractable supersymmetric theories, can
nevertheless be related to fluctuations about non-perturbative sectors via
resurgence. We also demonstrate that, in the same class of theories, the
vanishing of the ground state energy (unbroken supersymmetry) can be attributed
to the cancellation between a real saddle and a complex saddle (with hidden
topological angle pi), and positivity of the ground state energy (broken
supersymmetry) can be interpreted as the dominance of complex saddles. In
either case, despite the fact that the ground state energy is zero to all
orders in perturbation theory, all orders of fluctuations around
non-perturbative saddles are encoded in the perturbative E(N, g). We illustrate
these ideas with examples from supersymmetric quantum mechanics and quantum
field theory.Comment: 19 p | Deconstructing zero: resurgence, supersymmetry and complex saddles | deconstructing zero: resurgence, supersymmetry and complex saddles | vanishing truncated perturbative arises classically tractable supersymmetric nevertheless perturbative sectors resurgence. vanishing unbroken supersymmetry attributed cancellation saddle saddle hidden topological positivity broken supersymmetry interpreted dominance saddles. orders perturbation orders perturbative saddles encoded perturbative illustrate ideas supersymmetric mechanics | non_dup | [] |
73357177 | 10.1007/JHEP12(2016)004 | We use super-spectral curve to investigate irregular conformal states of
integer and half-odd integer rank. The spectral curve is the loop equation of
supersymmetrized irregular matrix model. The case of integer rank corresponds
to the colliding limit of supersymmetric vertex operators of NS sector and
half-odd integer to the Ramond sectors. The spectral curve is simply integrable
at Nekrasov-Shatashvili limit and the partition function (inner product of
irregular conformal state) is obtained from the superconformal structure
manifest in the spectral curve. We present some explicit forms of the partition
function of integer (NS sector) and of half-odd ranks (Ramond sector) | Super-spectral curve of irregular conformal blocks | super-spectral curve of irregular conformal blocks | super irregular conformal integer integer rank. supersymmetrized irregular model. integer colliding supersymmetric integer ramond sectors. integrable nekrasov shatashvili partition irregular conformal superconformal manifest curve. partition integer ranks ramond | non_dup | [] |
42727662 | 10.1007/JHEP12(2016)005 | We revisit the calculation of instanton effects in correlation functions in
${\cal N}=4$ SYM involving the Konishi operator and operators of twist two.
Previous studies revealed that the scaling dimensions and the OPE coefficients
of these operators do not receive instanton corrections in the semiclassical
approximation. We go beyond this approximation and demonstrate that, while
operators belonging to the same ${\cal N}=4$ supermultiplet ought to have the
same conformal data, the evaluation of quantum instanton corrections for one
operator can be mapped into a semiclassical computation for another operator in
the same supermultiplet. This observation allows us to compute explicitly the
leading instanton correction to the scaling dimension of operators in the
Konishi supermultiplet as well as to their structure constants in the OPE of
two half-BPS scalar operators. We then use these results, together with
crossing symmetry, to determine instanton corrections to scaling dimensions of
twist-four operators with large spin.Comment: 25 pages; v2: minor changes, typos correcte | Revisiting instanton corrections to the Konishi multiplet | revisiting instanton corrections to the konishi multiplet | revisit instanton involving konishi twist two. receive instanton semiclassical approximation. belonging supermultiplet ought conformal instanton mapped semiclassical supermultiplet. explicitly instanton konishi supermultiplet operators. crossing instanton twist pages minor typos correcte | non_dup | [] |
73355908 | 10.1007/JHEP12(2016)006 | In this note we study the connected prescription, originally derived from
Witten's twistor string theory, for tree-level form factors in ${\cal N}=4$
super-Yang-Mills theory. The construction is based on the recently proposed
four-dimensional scattering equations with $n$ massless on-shell states and one
off-shell state, which we expect to work for form factors of general operators.
To illustrate the universality of the prescription, we propose compact formulas
for super form factors with chiral stress-tensor multiplet operator, and
bosonic ones with scalar operators ${\rm Tr}(\phi^m)$ for arbitrary $m$.Comment: 13 page | A note on connected formula for form factors | a note on connected formula for form factors | prescription originally witten twistor super mills theory. massless operators. illustrate universality prescription propose formulas super chiral multiplet bosonic .comment | non_dup | [] |
73374316 | 10.1007/JHEP12(2016)009 | In many interesting physical systems, the determinant which appears from
integrating out fermions becomes complex, and its phase plays a crucial role in
the determination of the vacuum. An example of this is QCD at low temperature
and high density, where various exotic fermion condensates are conjectured to
form. Another example is the Euclidean version of the type IIB matrix model for
10d superstring theory, where spontaneous breaking of the SO(10) rotational
symmetry down to SO(4) is expected to occur. When one applies the complex
Langevin method to these systems, one encounters the singular-drift problem
associated with the appearance of nearly zero eigenvalues of the Dirac
operator. Here we propose to avoid this problem by deforming the action with a
fermion bilinear term. The results for the original system are obtained by
extrapolations with respect to the deformation parameter. We demonstrate the
power of this approach by applying it to a simple matrix model, in which
spontaneous symmetry breaking from SO(4) to SO(2) is expected to occur due to
the phase of the complex fermion determinant. Unlike previous work based on a
reweighting-type method, we are able to determine the true vacuum by
calculating the order parameters, which agree with the prediction by the
Gaussian expansion method.Comment: 23 pages, 26 figures. The version accepted for publication in JHE | The complex Langevin analysis of spontaneous symmetry breaking induced
by complex fermion determinant | the complex langevin analysis of spontaneous symmetry breaking induced by complex fermion determinant | determinant integrating fermions plays crucial vacuum. exotic fermion condensates conjectured form. euclidean superstring spontaneous breaking rotational occur. applies langevin encounters singular drift appearance nearly eigenvalues dirac operator. propose avoid deforming fermion bilinear term. extrapolations deformation parameter. spontaneous breaking fermion determinant. unlike reweighting calculating agree pages figures. publication | non_dup | [] |
42751587 | 10.1007/JHEP12(2016)010 | We show how to use on-shell unitarity methods to calculate renormalization
group coefficients such as beta functions and anomalous dimensions. The central
objects are the form factors of composite operators. Their discontinuities can
be calculated via phase-space integrals and are related to corresponding
anomalous dimensions. In particular, we find that the dilatation operator,
which measures the anomalous dimensions, is given by minus the phase of the
S-matrix divided by pi. We illustrate our method using several examples from
Yang-Mills theory, perturbative QCD and Yukawa theory at one-loop level and
beyond.Comment: 25 pages, 4 figures; v2: explanations improved, references added,
matches journal versio | Renormalization group coefficients and the S-matrix | renormalization group coefficients and the s-matrix | unitarity renormalization beta anomalous dimensions. composite operators. discontinuities integrals anomalous dimensions. dilatation anomalous minus divided illustrate mills perturbative yukawa pages explanations matches versio | non_dup | [] |
42721058 | 10.1007/JHEP12(2016)012 | Weyl consistency conditions have been used in unitary relativistic quantum
field theory to impose constraints on the renormalization group flow of certain
quantities. We classify the Weyl anomalies and their renormalization scheme
ambiguities for generic non-relativistic theories in 2+1 dimensions with
anisotropic scaling exponent z=2; the extension to other values of z are
discussed as well. We give the consistency conditions among these anomalies. As
an application we find several candidates for a C-theorem. We comment on
possible candidates for a $C$-theorem in higher dimensions.Comment: 38 pages, 1 figure, 7 tables; We took out the section on arbitrary
dimension in version:2 !! In version:3 , a section (Sec: V) with NEW RESULTS
on possible C-theorem candidates in arbitrary dimensions is added; v4:matched
with journal version and updated section I | Weyl Consistency Conditions in Non-Relativistic Quantum Field Theory | weyl consistency conditions in non-relativistic quantum field theory | weyl consistency unitary relativistic impose renormalization quantities. classify weyl anomalies renormalization ambiguities generic relativistic anisotropic exponent well. consistency anomalies. candidates theorem. comment candidates pages tables took candidates matched updated | non_dup | [] |
73350650 | 10.1007/JHEP12(2016)014 | We study an extension of the Standard Model (SM) in which two copies of the
SM scalar $SU(2)$ doublet which do not acquire a Vacuum Expectation Value
(VEV), and hence are \textit{inert}, are added to the scalar sector. We allow
for CP-violation in the \textit{inert} sector, where the lightest
\textit{inert} state is protected from decaying to SM particles through the
conservation of a $Z_2$ symmetry. The lightest neutral particle from the
\textit{inert} sector, which has a mixed CP-charge due to CP-violation, is
hence a Dark Matter (DM) candidate. We discuss the new regions of DM relic
density opened up by CP-violation, and compare our results to the CP-conserving
limit and the Inert Doublet Model (IDM). We constrain the parameter space of
the CP-violating model using recent results from the Large Hadron Collider
(LHC) and DM direct and indirect detection experiments.Comment: 42 pages, 22 figure | CP violating scalar Dark Matter | cp violating scalar dark matter | copies doublet acquire expectation textit inert sector. violation textit inert lightest textit inert protected decaying conservation symmetry. lightest neutral textit inert violation candidate. relic opened violation conserving inert doublet constrain violating hadron collider indirect pages | non_dup | [] |
42657483 | 10.1007/JHEP12(2016)015 | Three-dimensional quantum electrodynamics with $N$ charged fermions contains
monopole operators that have been studied perturbatively at large $N$. Here, we
initiate the study of these monopole operators in the $4-\epsilon$ expansion by
generalizing them to codimension-3 defect operators in $d = 4-\epsilon$
spacetime dimensions. Assuming the infrared dynamics is described by an
interacting CFT, we define the "conformal weight" of these operators in terms
of the free energy density on $S^2 \times \mathbb{H}^{2-\epsilon}$ in the
presence of magnetic flux through the $S^2$, and calculate this quantity to
next-to-leading order in $\epsilon$. Extrapolating the conformal weight to
$\epsilon = 1$ gives an estimate of the scaling dimension of the monopole
operators in $d=3$ that does not rely on the $1/N$ expansion. We also perform
the computation of the conformal weight in the large $N$ expansion for any $d$
and find agreement between the large $N$ and the small $\epsilon$ expansions in
their overlapping regime of validity.Comment: 45 pages, 3 figures, version accepted by journa | Monopole operators from the $4-\epsilon$ expansion | monopole operators from the $4-\epsilon$ expansion | electrodynamics fermions monopole perturbatively initiate monopole epsilon generalizing codimension defect epsilon spacetime dimensions. infrared interacting conformal mathbb epsilon quantity epsilon extrapolating conformal epsilon monopole rely expansion. conformal epsilon expansions overlapping pages journa | non_dup | [] |
42752754 | 10.1007/JHEP12(2016)016 | 6d SCFTs compactified on a circle can often be studied from nonperturbative
5d super-Yang-Mills theories, using instanton solitons. However, the 5d
Yang-Mills theories with 6d UV fixed points frequently have too many
hypermultiplet matters, which makes it difficult to use the ADHM techniques for
instantons. With the examples of 6d $\mathcal{N}=(1,0)$ SCFTs with $Sp(N)$
gauge symmetry and $2N+8$ fundamental hypermultiplets, we show that one can
still make rigorous studies of these 5d-6d relations in the `fractional D-brane
sectors'. We test the recently proposed 5d duals given by $Sp(N+1)$ gauge
theories, and compare their instanton partition functions with the elliptic
genera of 6d self-dual strings.Comment: 21 pages, 4 figure | Testing 5d-6d dualities with fractional D-branes | testing 5d-6d dualities with fractional d-branes | scfts compactified circle nonperturbative super mills instanton solitons. mills frequently hypermultiplet matters adhm instantons. mathcal scfts hypermultiplets rigorous fractional brane sectors duals instanton partition elliptic genera pages | non_dup | [] |
42740767 | 10.1007/JHEP12(2016)017 | Recently, an intriguing family of the one-point toric conformal blocks AGT
related to the $\mathcal{N}=2^*\,\, SU(2)$ Nekrasov functions was discovered by
M. Beccaria and G. Macorini. Members of the family are distinguished by having
only finite amount of poles as functions of the intermediate dimension/v.e.v.
in gauge theory. Another remarkable property is that these conformal
blocks/Nekrasov functions can be found in closed form to all orders in the
coupling expansion. In the present paper we use Zamolodchikov's recurrence
equation to systematically account for these exceptional conformal blocks. We
conjecture that the family is infinite-dimensional and describe the
corresponding parameter set. We further apply the developed technique to
demonstrate that the four-point spheric conformal blocks feature analogous
exact expressions. We also study the modular transformations of the finite-pole
blocks.Comment: Version 2: significantly revised and extended to include spheric
blocks and modular transformations, 27 page | On new exact conformal blocks and Nekrasov functions | on new exact conformal blocks and nekrasov functions | intriguing toric conformal blocks mathcal nekrasov discovered beccaria macorini. distinguished poles v.e.v. theory. remarkable conformal blocks nekrasov orders expansion. zamolodchikov recurrence systematically exceptional conformal blocks. conjecture infinite set. spheric conformal blocks analogous expressions. modular transformations pole revised spheric blocks modular transformations | non_dup | [] |
73391845 | 10.1007/JHEP12(2016)020 | We consider the tree-level scattering amplitudes in the NS-NS (Neveu-Schwarz)
massless sector of closed superstrings in the case where one external state
becomes soft. We compute the amplitudes generically for any number of
dimensions and any number and kind of the massless closed states through the
subsubleading order in the soft expansion. We show that, when the soft state is
a graviton or a dilaton, the full result can be expressed as a soft theorem
factorizing the amplitude in a soft and a hard part. This behavior is similar
to what has previously been observed in field theory and in the bosonic string.
Differently from the bosonic string, the supersymmetric soft theorem for the
graviton has no string corrections at subsubleading order. The dilaton soft
theorem, on the other hand, is found to be universally free of string
corrections in any string theory.Comment: 27 pages, one appendi | Soft behavior of a closed massless state in superstring and universality
in the soft behavior of the dilaton | soft behavior of a closed massless state in superstring and universality in the soft behavior of the dilaton | amplitudes neveu schwarz massless superstrings soft. amplitudes generically kind massless subsubleading expansion. graviton dilaton factorizing part. bosonic string. differently bosonic supersymmetric graviton subsubleading order. dilaton universally pages appendi | non_dup | [] |
73401135 | 10.1007/JHEP12(2016)021 | We study two-sided static wormholes with an exact Killing symmetry that
translates both mouths of the wormhole toward the future. This differs from the
familiar Kruskal wormhole whose time translation is future-directed only in one
asymptotic region and is instead past-directed in the other. Our spacetimes are
solutions to Einstein-Hilbert gravity sourced by scalar domain walls. Explicit
examples are found in the thin wall approximation. More generally, we show that
such spacetimes can arise in the presence of scalar fields with potentials that
are $C^1$ but not $C^2$ and find examples numerically. However, solutions with
an exact such Killing symmetry are forbidden when the scalar potential is
smooth. Finally, we consider the mutual information of boundary regions
associated with such wormholes in AdS/CFT. Although the interior of our
solutions are unstable, we find that even mutual informations between opposite
boundaries are already thermalized at any finite $t$ in the sense that they
agree with the $t\rightarrow \infty$ limit of results from the familiar
AdS-Kruskal solution.Comment: 19 pages, 6 figure | Time-independent wormholes | time-independent wormholes | sided wormholes killing translates mouths wormhole toward future. differs familiar kruskal wormhole translation directed asymptotic directed other. spacetimes einstein hilbert sourced walls. approximation. spacetimes arise potentials numerically. killing forbidden smooth. mutual wormholes cft. interior unstable mutual informations opposite boundaries thermalized agree rightarrow infty familiar kruskal pages | non_dup | [] |
73358742 | 10.1007/JHEP12(2016)022 | We propose a technically natural scenario whereby an initially large
cosmological constant (c.c.) is relaxed down to the observed value due to the
dynamics of a scalar evolving on a very shallow potential. The model crucially
relies on a sector that violates the null energy condition (NEC) and gets
activated only when the Hubble rate becomes sufficiently small --- of the order
of the present one. As a result of NEC violation, this low-energy universe
evolves into inflation, followed by reheating and the standard Big Bang
cosmology. The symmetries of the theory force the c.c. to be the same before
and after the NEC-violating phase, so that a late-time observer sees an
effective c.c. of the correct magnitude. Importantly, our model allows neither
for eternal inflation nor for a set of possible values of dark energy, the
latter fixed by the parameters of the theory.Comment: 33 pages, 6 figures. v2: minor changes; references added; version
published in JHE | Relaxing the Cosmological Constant: a Proof of Concept | relaxing the cosmological constant: a proof of concept | propose technically whereby initially cosmological c.c. relaxed evolving shallow potential. crucially relies violates gets hubble sufficiently one. violation universe evolves inflation reheating bang cosmology. symmetries c.c. violating observer sees c.c. magnitude. importantly neither eternal inflation pages figures. minor | non_dup | [] |
73384072 | 10.1007/JHEP12(2016)023 | The Littlest Seesaw (LS) model involves two right-handed neutrinos and a very
constrained Dirac neutrino mass matrix, involving one texture zero and two
independent Dirac masses, leading to a highly predictive scheme in which all
neutrino masses and the entire PMNS matrix is successfully predicted in terms
of just two real parameters. We calculate the renormalisation group (RG)
corrections to the LS predictions, with and without supersymmetry, including
also the threshold effects induced by the decoupling of heavy Majorana
neutrinos both analytically and numerically. We find that the predictions for
neutrino mixing angles and mass ratios are rather stable under RG corrections.
For example we find that the LS model with RG corrections predicts close to
maximal atmospheric mixing, $\theta_{23}=45^\circ \pm 1^\circ$, in most
considered cases, in tension with the latest NOvA results. The techniques used
here apply to other seesaw models with a strong normal mass hierarchy.Comment: 28 pages, 4 figures, 5 tables; v2: references added, include the
scenario where both mass scales of right-handed neutrinos are varied, version
to be published in JHE | Renormalisation Group Corrections to the Littlest Seesaw Model and
Maximal Atmospheric Mixing | renormalisation group corrections to the littlest seesaw model and maximal atmospheric mixing | littlest seesaw involves handed neutrinos constrained dirac involving texture dirac predictive pmns successfully parameters. renormalisation supersymmetry decoupling majorana neutrinos analytically numerically. angles corrections. predicts maximal theta circ circ tension latest nova results. seesaw pages tables handed neutrinos varied | non_dup | [] |