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24961400 | 10.1007/JHEP12(2013)099 | We compute the exact two-sphere partition function and matrix of two-point
functions of operators in the chiral ring with their complex conjugates in
two-dimensional supersymmetric gauge theories. For gauge theories that flow in
the infrared to a Calabi-Yau nonlinear sigma model, these renormalization group
invariant observables determine the exact Kahler potential and associated
Zamolodchikov metric in the complex structure moduli space of the Calabi-Yau
manifold.Comment: 36 pages, LaTeX, with minor correction | Gauge Theory Dynamics and Kahler Potential for Calabi-Yau Complex Moduli | gauge theory dynamics and kahler potential for calabi-yau complex moduli | sphere partition chiral conjugates supersymmetric theories. infrared calabi sigma renormalization observables kahler zamolodchikov moduli calabi pages latex minor | non_dup | [] |
24961250 | 10.1007/JHEP12(2013)101 | The non-chiral edge excitations of quantum spin Hall systems and topological
insulators are described by means of their partition function. The stability of
topological phases protected by time-reversal symmetry is rediscussed in this
context and put in relation with the existence of discrete anomalies and the
lack of modular invariance of the partition function. The $\Z_2$
characterization of stable topological insulators is extended to systems with
interacting and non-Abelian edge excitations.Comment: 41 pages, 7 figure | Partition Functions and Stability Criteria of Topological Insulators | partition functions and stability criteria of topological insulators | chiral excitations hall topological insulators partition function. topological protected reversal rediscussed anomalies modular invariance partition function. topological insulators interacting abelian pages | non_dup | [] |
24966307 | 10.1007/JHEP12(2013)103 | The recent discovery of a Higgs boson by the LHC experiments has profound
implications for supersymmetric models. In particular, in the context of
restricted models, such as the supergravity-inspired constrained minimal
supersymmetric standard model, one finds that preferred regions in parameter
space have large soft supersymmetry-breaking trilinear couplings. This
potentially gives rise to charge- and/or color-breaking minima besides those
with the correct breaking of $SU(2)_L \times U(1)_Y$. We investigate the
stability of parameter points in this model against tunneling to possible
deeper color- and/or charge-breaking minima of the one-loop effective
potential. We find that allowed regions of the parameter space with light staus
or with light stops are seriously constrained by the requirement that the
tunneling time out of the normal electroweak-symmetry-breaking vacuum is more
than a fifth of the age of the known Universe. We also find that "thumb rule"
conditions on Lagrangian parameters based on specific directions in the
tree-level potential are of limited use.Comment: 30 pages, 14 figures. V2: as published in JHEP (+1 extra ref.); while
awaiting review, code error was found and tunneling times had to be re-done.
Main results unchanged: quick tunneling to CCB minima restricts relevant
parameter space; no analytic formula finds points with CCB global minima
well. However, parameter space allowed by long tunneling times is larger:
stau co-annihilation seems saf | Stability of the CMSSM against sfermion VEVs | stability of the cmssm against sfermion vevs | discovery boson profound supersymmetric models. restricted supergravity inspired constrained supersymmetric finds preferred supersymmetry breaking trilinear couplings. potentially breaking minima besides breaking tunneling deeper breaking minima potential. staus stops seriously constrained requirement tunneling electroweak breaking fifth universe. thumb lagrangian directions pages figures. jhep extra ref. awaiting tunneling done. unchanged quick tunneling minima restricts analytic finds minima well. tunneling stau annihilation | non_dup | [] |
25036010 | 10.1007/JHEP12(2014)006 | We explore maximal unitarity for nonplanar two-loop integrals with up to four
massive external legs. In this framework, the amplitude is reduced to a basis
of master integrals whose coefficients are extracted from maximal cuts. The
hepta-cut of the nonplanar double box defines a nodal algebraic curve
associated with a multiply pinched genus-3 Riemann surface. All possible
configurations of external masses are covered by two distinct topological
pictures in which the curve decomposes into either six or eight Riemann
spheres. The procedure relies on consistency equations based on vanishing of
integrals of total derivatives and Levi-Civita contractions. Our analysis
indicates that these constraints are governed by the global structure of the
maximal cut. Lastly, we present an algorithm for computing generalized cuts of
massive integrals with higher powers of propagators based on the Bezoutian
matrix method.Comment: 54 pages, 9 figures, v2: journal versio | Massive Nonplanar Two-Loop Maximal Unitarity | massive nonplanar two-loop maximal unitarity | explore maximal unitarity nonplanar integrals massive legs. master integrals maximal cuts. hepta nonplanar defines nodal algebraic multiply pinched genus riemann surface. configurations covered topological pictures decomposes eight riemann spheres. relies consistency vanishing integrals derivatives levi civita contractions. governed maximal cut. lastly cuts massive integrals powers propagators bezoutian pages versio | non_dup | [] |
25057855 | 10.1007/JHEP12(2014)008 | We study heterotic supergravity at $\mathcal{O}(\alpha')$, first described in
detail in 1989 by Bergshoeff and de Roo. In particular, we discuss an ambiguity
of a connection choice on the tangent bundle. It is well known that at
$\mathcal{O}(\alpha')$ the Hull connection gives a consistent supergravity
theory with supersymmetry transformations given in the usual way. We consider
deformations of this connection corresponding to field redefinitions, and the
necessary corrections to the supersymmetry transformations. We are interested
in the moduli space of such field redefinitions which allow for supersymmetric
solutions to the equations of motion. We show that for solutions on $M_4\times
X$, where $M_4$ is Minkowski and $X$ is compact, the moduli space of
infinitesimal field redefinitions is given by $H^{(0,1)}(X,\textrm{End}(TX))$.
This space corresponds to infinitesimally close connections for which the
equations of motion are satisfied. The setup suggests a symmetry between the
gauge connection and the tangent bundle connection, as also employed by
Bergshoeff and de Roo. We argue that this symmetry should be kept to higher
orders in $\alpha'$, and propose a natural choice for the corresponding tangent
bundle connection used in curvature computations. In particular, the Hull
connection should be corrected at second and higher orders in $\alpha'$ from
this point of view.Comment: 30 pages, minor corrections and changes, explanations adde | Connections, Field Redefinitions and Heterotic Supergravity | connections, field redefinitions and heterotic supergravity | heterotic supergravity mathcal alpha bergshoeff roo. ambiguity connection tangent bundle. mathcal alpha hull connection supergravity supersymmetry transformations usual way. deformations connection redefinitions supersymmetry transformations. interested moduli redefinitions supersymmetric motion. minkowski moduli infinitesimal redefinitions textrm infinitesimally connections satisfied. setup connection tangent bundle connection bergshoeff roo. argue kept orders alpha propose tangent bundle connection curvature computations. hull connection corrected orders alpha pages minor explanations adde | non_dup | [] |
25031824 | 10.1007/JHEP12(2014)010 | A number of LHC searches now display intriguing excesses. Most prominently,
the measurement of the $W^+W^-$ cross-section has been consistently $\sim 20\%$
higher than the theoretical prediction across both ATLAS and CMS for both 7 and
8 TeV runs. More recently, supersymmetric searches for final states containing
two or three leptons have also seen more events than predicted in certain
signal regions. We show that a supersymmetric model containing a light stop,
winos and binos can consistently match the data. We perform a fit to all
measurements and searches that may be sensitive to our model and find a
reduction in the log-likelihood of 15.4 compared to the Standard Model which
corresponds to 3.5-$\sigma$ once the extra degrees of freedom in the fit are
considered.Comment: 19 pages, 5 Figures. v3: minor corrections, to appear at JHE | `Stop' that ambulance! New physics at the LHC? | `stop' that ambulance! new physics at the lhc? | searches display intriguing excesses. prominently consistently atlas runs. supersymmetric searches leptons regions. supersymmetric stop winos binos consistently match data. searches likelihood sigma extra freedom pages figures. minor | non_dup | [] |
25046711 | 10.1007/JHEP12(2014)012 | We study three-dimensional consistent truncations of type IIB supergravity
which admit warped AdS$_3$ solutions. These theories contain subsectors that
have no bulk dynamics. We show that the symplectic form for these theories,
when restricted to the non-dynamical subsectors, equals the symplectic form for
pure Einstein gravity in AdS$_3$. Consequently, for each consistent choice of
boundary conditions in AdS$_3$, we can define a consistent phase space in
warped AdS$_3$ with identical conserved charges. This way, we easily obtain a
Virasoro $\times$ Virasoro asymptotic symmetry algebra in warped AdS$_3$; two
different types of Virasoro $\times$ Ka\v{c}-Moody symmetries are also
consistent alternatives.
Next, we study the phase space of these theories when propagating modes are
included. We show that, as long as one can define a conserved symplectic form
without introducing instabilities, the Virasoro $\times$ Virasoro asymptotic
symmetries can be extended to the entire (linearized) phase space. This implies
that, at least at semi-classical level, consistent theories of gravity in
warped AdS$_3$ are described by a two-dimensional conformal field theory, as
long as stability is not an issue.Comment: 41 pages, 1 figur | Two Virasoro symmetries in stringy warped AdS$_3$ | two virasoro symmetries in stringy warped ads$_3$ | truncations supergravity admit warped solutions. subsectors dynamics. symplectic restricted subsectors equals symplectic einstein warped conserved charges. virasoro virasoro asymptotic warped virasoro moody symmetries alternatives. propagating included. conserved symplectic introducing instabilities virasoro virasoro asymptotic symmetries linearized space. warped conformal pages figur | non_dup | [] |
25050512 | 10.1007/JHEP12(2014)013 | We consider extensions of the Standard Model by vectorlike leptons and set
limits on a new charged lepton, $e_4^\pm$, using the ATLAS search for anomalous
production of multi-lepton events. It is assumed that only one Standard Model
lepton, namely the muon, dominantly mixes with vectorlike leptons resulting in
possible decays $e_4^\pm \to W^\pm \nu_\mu$, $e_4^\pm \to Z\mu^\pm$, and
$e_4^\pm \to h \mu^\pm$. We derive generally applicable limits on the new
lepton treating the branching ratios for these processes as free variables. We
further interpret the general limits in two scenarios with $e_4^\pm$
originating predominantly from either the $SU(2)$ doublet or the $SU(2)$
singlet. The doublet case is more constrained as a result of larger production
cross-section and extra production processes $e_4^\pm \nu_4$ and $\nu_4\nu_4$
in addition to $e_4^+ e_4^-$, where $\nu_4$ is a new neutral state accompanying
$e_4$. We find that some combinations of branching ratios are poorly
constrained, whereas some are constrained up to masses of more than 500 GeV. In
the doublet case, assuming BR$(\nu_4\rightarrow W\mu) = 1$, all masses below
about 300 GeV are ruled out. Even if this condition is relaxed and additional
decay modes, $\nu_4 \to Z \nu_\mu$ and $\nu_4 \to h \nu_\mu$, are allowed,
below the Higgs threshold still almost all of the parameter space (of
independent branching ratios) is ruled out. Nevertheless, even assuming the
maximal production cross-section, which coincides with the doublet case, the
new charged lepton can still be as light as the LEP-II limit allows. We discuss
several possible improvements of current experimental analyses that would
dramatically reduce the allowed parameter space, even with current data.Comment: 24 pages, 11 figure | Limits on Vectorlike Leptons from Searches for Anomalous Production of
Multi-Lepton Events | limits on vectorlike leptons from searches for anomalous production of multi-lepton events | extensions vectorlike leptons lepton atlas anomalous lepton events. lepton muon dominantly mixes vectorlike leptons decays derive applicable lepton treating branching variables. interpret scenarios originating predominantly doublet singlet. doublet constrained extra neutral accompanying combinations branching poorly constrained constrained gev. doublet rightarrow ruled out. relaxed branching ruled out. nevertheless maximal coincides doublet lepton allows. improvements dramatically pages | non_dup | [] |
25044528 | 10.1007/JHEP12(2014)014 | Most successful models of inflation in supergravity have a shift symmetry for
the inflaton and contain a stabilizer field coupled to the inflaton in a
particular way. We argue that the natural interpretation of the stabilizer,
from the viewpoint of the shift symmetry, is a three-form multiplet. Its
coupling to the inflaton is uniquely determined by the shift symmetry and the
invariance under three-form gauge transformations and has a natural string
theory interpretation.Comment: 15 pages, references adde | Three-form multiplet and Inflation | three-form multiplet and inflation | successful inflation supergravity inflaton stabilizer inflaton way. argue stabilizer viewpoint multiplet. inflaton uniquely invariance transformations pages adde | non_dup | [] |
25035113 | 10.1007/JHEP12(2014)016 | Quantum black holes are difficult to describe. We consider two seemingly
divergent approaches, high-energy scattering and the proposal to regard black
holes as Bose-Einstein condensates of gravitons, and establish a connection
between them. High-energy scattering is studied in the eikonal approximation,
which is processed further by a saddle-point approximation. The dominant
contribution to the scattering amplitude comes from a ladder diagram with the
exchange of N gravitons, and the number of gravitons follows a Poisson
distribution. This approximation supports the picture of a graviton
Bose-Einstein condensate with an extent equal the Schwarzschild radius, which
grows with N in a way determined by the saddle point. The approach permits
calculations of 1 / N corrections from the fluctuations around the saddle
points and we comment on these. Scattering methods might be useful probes of
quantum black holes, especially when interpreted in terms of condensates.Comment: 8 pages, 1 figur | High-Energy Gravitational Scattering and Bose-Einstein Condensates of
Gravitons | high-energy gravitational scattering and bose-einstein condensates of gravitons | holes describe. seemingly divergent proposal regard holes bose einstein condensates gravitons establish connection them. eikonal processed saddle approximation. comes ladder gravitons gravitons poisson distribution. supports picture graviton bose einstein condensate schwarzschild grows saddle point. permits saddle comment these. probes holes interpreted pages figur | non_dup | [] |
25052004 | 10.1007/JHEP12(2014)018 | In the present paper, we make a detailed study on the doubly heavy baryon
photoproduction in the future $e^+e^-$ International Linear Collider (ILC). The
baryons $\Xi_{cc}$, $\Xi_{bc}$, and $\Xi_{bb}$ are produced via the channel
$\gamma \gamma \to \Xi_{QQ'} +\bar{Q'} +\bar{Q}$, where $Q$ and $Q'$ stand for
heavy $c$ or $b$ quark, respectively. As for the $\Xi_{QQ'}$-baryon production,
it shall first generate a $(QQ')[n]$-diquark and then form the final baryon via
fragmentation, where $[n]$ stands for the color- and spin- configurations for
the $(QQ')$-diquark states. According to the non-relativistic QCD theory, four
diquark configurations shall provide sizable contributions to the baryon
production, e.g., $[n]$ equals $[^3S_1]_{\bar{\textbf{3}}}$,
$[^1S_0]_{\textbf{6}}$, $[^3S_1]_{\textbf{6}}$, or
$[^1S_0]_{\bar{\textbf{3}}}$, respectively. We adopt the improved helicity
amplitude approach for the hard scattering amplitude to improve the calculation
efficiency. Total and differential cross sections of those channels, as well as
the theoretical uncertainties, are presented. We show that sizable amounts of
baryon events can be generated at the ILC, i.e., about $2.0\times 10^{6}$
$\Xi_{cc}$, $2.2\times 10^{5}$ $\Xi_{bc}$, as well as $3.0\times
10^{3}\;\Xi_{bb}$ events are to be generated in one operation year for
$\sqrt{S}=500$ GeV and ${\cal L}\simeq 10^{36}$cm$^{-2}$s$^{-1}$.Comment: 8 pages, 6 figures. Discussions improved and references updated. To
be published in JHE | Photoproduction of doubly heavy baryon at the ILC | photoproduction of doubly heavy baryon at the ilc | doubly baryon photoproduction collider baryons gamma gamma stand respectively. baryon diquark baryon fragmentation stands configurations diquark states. relativistic diquark configurations sizable baryon e.g. equals textbf textbf textbf textbf respectively. adopt helicity efficiency. presented. sizable amounts baryon i.e. sqrt simeq .comment pages figures. discussions updated. | non_dup | [] |
25050349 | 10.1007/JHEP12(2014)019 | In theoretical physics, we sometimes have two perturbative expansions of
physical quantity around different two points in parameter space. In terms of
the two perturbative expansions, we introduce a new type of smooth
interpolating function consistent with the both expansions, which includes the
standard Pad\'e approximant and fractional power of polynomial method
constructed by Sen as special cases. We point out that we can construct
enormous number of such interpolating functions in principle while the "best"
approximation for the exact answer of the physical quantity should be unique
among the interpolating functions. We propose a criterion to determine the
"best" interpolating function, which is applicable except some situations even
if we do not know the exact answer. It turns out that our criterion works for
various examples including specific heat in two-dimensional Ising model,
average plaquette in four-dimensional SU(3) pure Yang-Mills theory on lattice
and free energy in c=1 string theory at self-dual radius. We also mention
possible applications of the interpolating functions to system with phase
transition.Comment: 31+11 pages, 15 figures, 9 tables, 1 Mathematica file; v3: minor
correction | On Perturbation theory improved by Strong coupling expansion | on perturbation theory improved by strong coupling expansion | sometimes perturbative expansions quantity space. perturbative expansions interpolating expansions approximant fractional cases. enormous interpolating answer quantity interpolating functions. propose criterion interpolating applicable situations answer. turns criterion ising plaquette mills radius. mention interpolating pages tables mathematica file minor | non_dup | [] |
25051152 | 10.1007/JHEP12(2014)021 | At the heart of the black hole information loss paradox and the firewall
controversy lies the conflict between quantum mechanics and general relativity.
Much has been said about quantum corrections to general relativity, but much
less in the opposite direction. It is therefore crucial to examine possible
corrections to quantum mechanics due to gravity. Indeed, the Heisenberg
Uncertainty Principle is one profound feature of quantum mechanics, which
nevertheless may receive correction when gravitational effects become
important. Such generalized uncertainty principle [GUP] has been motivated from
not only quite general considerations of quantum mechanics and gravity, but
also string theoretic arguments. We examine the role of GUP in the context of
black hole complementarity. We find that while complementarity can be violated
by large N rescaling if one assumes only the Heisenberg's Uncertainty
Principle, the application of GUP may save complementarity, but only if certain
N-dependence is also assumed. This raises two important questions beyond the
scope of this work, i.e., whether GUP really has the proposed form of
N-dependence, and whether black hole complementarity is indeed correct.Comment: Added footnote 5; version accepted by JHE | Generalized Uncertainty Principle: Implications for Black Hole
Complementarity | generalized uncertainty principle: implications for black hole complementarity | paradox firewall controversy lies conflict mechanics relativity. said relativity opposite direction. crucial examine mechanics gravity. heisenberg profound mechanics nevertheless receive gravitational important. motivated considerations mechanics theoretic arguments. examine complementarity. complementarity violated rescaling assumes heisenberg save complementarity assumed. raises scope i.e. really complementarity footnote | non_dup | [] |
25018270 | 10.1007/JHEP12(2014)023 | We perform the resummation of soft-gluon emissions for squark and gluino
production at next- to-next-to-leading-logarithmic (NNLL) accuracy. We include
also the one-loop hard matching coefficients as well as Coulomb corrections to
second order, using Mellin-moment methods. We study the characteristics of this
resummation in detail for a centre-of-mass (CM) energy of 8 TeV at the LHC, and
for squark and gluino masses up to 2.5 TeV. We find significant enhancing
effects for all four processes of squark- and gluino-pair production. Scale
dependence is generally reduced compared to NLL resummation, except for
gluino-pair production where we find a moderate enhancement.Comment: 23 pages, 6 figures; added one table and modified figure | NNLL resummation for squark and gluino production at the LHC | nnll resummation for squark and gluino production at the lhc | resummation gluon squark gluino logarithmic nnll accuracy. matching coulomb mellin moment methods. resummation squark gluino tev. enhancing squark gluino production. resummation gluino moderate pages | non_dup | [] |
25050794 | 10.1007/JHEP12(2014)024 | We study the Higgs mass spectrum as predicted by a Maximally Symmetric Two
Higgs Doublet Model (MS-2HDM) potential based on the SO(5) group, softly broken
by bilinear Higgs mass terms. We show that the lightest Higgs sector resulting
from this MS-2HDM becomes naturally aligned with that of the Standard Model
(SM), independently of the charged Higgs boson mass and $\tan \beta$. In the
context of Type-II 2HDM, SO(5) is the simplest of the three possible symmetry
realizations of the scalar potential that can naturally lead to the SM
alignment. Nevertheless, renormalization group effects due to the hypercharge
gauge coupling $g'$ and third-generation Yukawa couplings may break sizeably
this SM alignment, along with the custodial symmetry inherited by the SO(5)
group. Using the current Higgs signal strength data from the LHC, which
disfavour large deviations from the SM alignment limit, we derive lower mass
bounds on the heavy Higgs sector as a function of $\tan\beta$, which can be
stronger than the existing limits for a wide range of parameters. In
particular, we propose a new collider signal based on the observation of four
top quarks to directly probe the heavy Higgs sector of the MS-2HDM during the
run-II phase of the LHC.Comment: 36 pages, 12 figures; corrected typos in Appendix | Maximally Symmetric Two Higgs Doublet Model with Natural Standard Model
Alignment | maximally symmetric two higgs doublet model with natural standard model alignment | maximally doublet softly broken bilinear terms. lightest naturally aligned independently boson beta simplest realizations naturally alignment. nevertheless renormalization hypercharge yukawa couplings break sizeably alignment custodial inherited group. disfavour deviations alignment derive bounds beta stronger parameters. propose collider quarks pages corrected typos | non_dup | [] |
25044688 | 10.1007/JHEP12(2014)025 | Within the Asymptotic Safety scenario, we discuss whether Quantum Einstein
Gravity (QEG) can give rise to a semi-classical regime of propagating physical
gravitons (gravitational waves) governed by an effective theory which complies
with the standard rules of local quantum field theory. According to earlier
investigations based on single-metric truncations there is a tension between
this requirement and the condition of Asymptotic Safety since the former
(latter) requires a positive (negative) anomalous dimension of Newton's
constant. We show that the problem disappears using the bi-metric
renormalization group flows that became available recently: They admit an
asymptotically safe UV limit and, at the same time, a genuine semi-classical
regime with a positive anomalous dimension. This brings the gravitons of QEG on
a par with arbitrary (standard model, etc.) particles which exist as asymptotic
states. We also argue that metric perturbations on almost Planckian scales
might not be propagating, and we propose an interpretation as a form of `dark
matter'.Comment: 12 figures; further discussions adde | Propagating gravitons vs. dark matter in asymptotically safe quantum
gravity | propagating gravitons vs. dark matter in asymptotically safe quantum gravity | asymptotic einstein propagating gravitons gravitational governed complies theory. investigations truncations tension requirement asymptotic former anomalous newton constant. disappears renormalization flows became admit asymptotically safe genuine anomalous dimension. brings gravitons etc. asymptotic states. argue perturbations planckian propagating propose .comment discussions adde | non_dup | [] |
35085405 | 10.1007/JHEP12(2014)029 | We present a computation, within weakly-coupled thermal QCD, of the production rate of low invariant mass ( M 2 ~ g 2 T 2 ) dileptons, at next-to-leading order (NLO) in the coupling (which is O g 3 e 2 T 2 $$ \mathcal{O}\left({g}^3{e}^2{T}^2\right) $$ ). This involves extending the NLO calculation of the photon rate which we recently presented to the case of small nonzero photon invariant mass. Numerical results are discussed and tabulated forms and code are provided for inclusion in hydrodynamical models. We find that NLO corrections can increase the dilepton rate by up to 30–40% relative to leading order. We find that the electromagnetic response of the plasma for real photons and for small invariant mass but high energy dilepton pairs (e.g., M 2 < (300 MeV) 2 but p T > 1 GeV) are close enough that dilepton pair measurements really can serve as ersatz photon measurements. We also present a matching a la Ghisoiu and Laine between our results and results at larger invariant masses | Low mass thermal dilepton production at NLO in a weakly coupled quark-gluon plasma | low mass thermal dilepton production at nlo in a weakly coupled quark-gluon plasma | weakly dileptons mathcal involves extending nonzero mass. tabulated inclusion hydrodynamical models. dilepton order. electromagnetic photons dilepton e.g. dilepton really serve ersatz measurements. matching ghisoiu laine | non_dup | [] |
25039145 | 10.1007/JHEP12(2014)032 | Combining the semiclassical/Nekrasov-Shatashvili limit of the AGT conjecture
and the Bethe/gauge correspondence results in a triple correspondence which
identifies classical conformal blocks with twisted superpotentials and then
with Yang-Yang functions. In this paper the triple correspondence is studied in
the simplest, yet not completely understood case of pure SU(2) super-Yang-Mills
gauge theory. A missing element of that correspondence is identified with the
classical irregular block. Explicit tests provide a convincing evidence that
such a function exists. In particular, it has been shown that the classical
irregular block can be recovered from classical blocks on the torus and sphere
in suitably defined decoupling limits of classical external conformal weights.
These limits are "classical analogues" of known decoupling limits for
corresponding quantum blocks. An exact correspondence between the classical
irregular block and the SU(2) gauge theory twisted superpotential has been
obtained as a result of another consistency check. The latter determines the
spectrum of the 2-particle periodic Toda (sin-Gordon) Hamiltonian in accord
with the Bethe/gauge correspondence. An analogue of this statement is found
entirely within 2d CFT. Namely, considering the classical limit of the null
vector decoupling equation for the degenerate irregular block a celebrated
Mathieu's equation is obtained with an eigenvalue determined by the classical
irregular block. As it has been checked this result reproduces a well known
weak coupling expansion of Mathieu's eigenvalue. Finally, yet another new
formulae for Mathieu's eigenvalue relating the latter to a solution of certain
Bethe-like equation are found.Comment: 47 pages, 3 figure | Classical irregular block, N=2 pure gauge theory and Mathieu equation | classical irregular block, n=2 pure gauge theory and mathieu equation | combining semiclassical nekrasov shatashvili conjecture bethe correspondence triple correspondence identifies conformal blocks twisted superpotentials functions. triple correspondence simplest understood super mills theory. missing correspondence irregular block. convincing exists. irregular recovered blocks torus sphere suitably decoupling conformal weights. analogues decoupling blocks. correspondence irregular twisted superpotential consistency check. determines toda gordon accord bethe correspondence. analogue statement entirely cft. decoupling degenerate irregular celebrated mathieu eigenvalue irregular block. checked reproduces mathieu eigenvalue. formulae mathieu eigenvalue relating bethe pages | non_dup | [] |
35084991 | 10.1007/JHEP12(2014)039 | We detail a calculation of W γ production in hadronic collision, at Next-to- Leading Order (NLO) QCD interfaced to a shower generator according to the POWHEG prescription supplemented with the MiNLO procedure. The fixed order result is matched to an interleaved QCD+QED parton shower, in such a way that the contribution arising from hadron fragmentation into photons is fully modeled. In general, our calculation illustrates a new approach to the fully exclusive simulation of prompt photon production processes accurate at the NLO level in QCD. We compare our predictions to those of the NLO program MCFM, which treats the fragmentation contribution in terms of a photon fragmentation functions. We also perform comparisons to available LHC data at 7 TeV, for which we observe good agreement, and provide phenomenological results for physics studies of the W γ production process at the Run II of the LHC. The new tool, which includes W leptonic decays and the contribution of anomalous gauge couplings, allows a fully exclusive, hadron-level description of the W γ process, and is publicly available at the repository of the POWHEG BOX. Our approach can be easily adapted to deal with other relevant isolated photon production processes in hadronic collisions | Wγ production in hadronic collisions using the POWHEG+MiNLO method | wγ production in hadronic collisions using the powheg+minlo method | hadronic collision interfaced shower generator powheg prescription supplemented minlo procedure. matched interleaved parton shower arising hadron fragmentation photons modeled. illustrates exclusive prompt qcd. mcfm treats fragmentation fragmentation functions. comparisons phenomenological lhc. leptonic decays anomalous couplings exclusive hadron publicly repository powheg box. adapted deal hadronic collisions | non_dup | [] |
25032770 | 10.1007/JHEP12(2014)041 | We argue that the usual notions of thermodynamic and entanglement entropy
have novel analogs in the context of higher spin theories. In particular, the
Wald and Ryu-Takayanagi formulas have natural higher spin extensions that we
work out and study. On the CFT side, just as standard entanglement entropy in
CFT_2 can be computed from twist field correlators, we demonstrate that by
introducing corresponding operators carrying higher spin charge we can
precisely reproduce our results from the bulk.
We also show that the first law for entanglement entropy implies the
linearized field equations for the metric and higher spin fields, generalizing
recent work on deriving the linearized Einstein equations from the first law.Comment: 39 page | A new spin on entanglement entropy | a new spin on entanglement entropy | argue usual notions thermodynamic entanglement analogs theories. wald takayanagi formulas extensions study. entanglement twist correlators introducing carrying precisely reproduce bulk. entanglement linearized generalizing deriving linearized einstein | non_dup | [] |
35085266 | 10.1007/JHEP12(2014)043 | The latest LHC data confirmed the existence of a Higgs-like particle and made interesting measurements on its decays into γγ , ZZ * , W W * , τ + τ − , and b b ¯ $$ b\overline{b} $$ . It is expected that a decay into Zγ might be measured at the next LHC round, for which there already exists an upper bound. The Higgs-like particle could be a mixture of scalar with a relatively large component of pseudoscalar. We compute the decay of such a mixed state into Zγ , and we study its properties in the context of the complex two Higgs doublet model, analysing the effect of the current measurements on the four versions of this model. We show that a measurement of the h → Zγ rate at a level consistent with the SM can be used to place interesting constraints on the pseudoscalar component. We also comment on the issue of a wrong sign Yukawa coupling for the bottom in Type II models | h → Zγ in the complex two Higgs doublet model | h → zγ in the complex two higgs doublet model | latest confirmed decays overline round bound. mixture pseudoscalar. doublet analysing versions model. pseudoscalar component. comment wrong yukawa | non_dup | [] |
35085330 | 10.1007/JHEP12(2014)048 | We introduce supersymmetric Rényi entropies for N $$ \mathcal{N} $$ = 1 supersymmetric gauge theories in five dimensions. The matrix model representation is obtained using the localization method and the large- N behavior is studied. The gravity dual is a supersymmetric charged topological AdS 6 black hole in the Romans F (4) supergravity. The variation of the supersymmetric Rényi entropy due to the insertion of a BPS Wilson loop is computed. We find perfect agreements between the large- N and the dual gravity computations both with and without the Wilson loop operator | Supersymmetric Rényi entropy in five dimensions | supersymmetric rényi entropy in five dimensions | supersymmetric rényi entropies mathcal supersymmetric dimensions. localization studied. supersymmetric topological romans supergravity. supersymmetric rényi insertion wilson computed. perfect agreements computations wilson | non_dup | [] |
35085322 | 10.1007/JHEP12(2014)053 | There are some slight tensions with the SM predictions within the latest LHCb measurements. Besides the known anomaly in one angular observable of the rare decay B → K * μ + μ − , another small discrepancy recently occurred. The ratio R K = BR( B + → K + μ + μ − ) / BR( B + → K + e + e − ) in the low- q 2 region has been measured by LHCb showing a 2 . 6 σ deviation from the SM prediction. In contrast to the anomaly in the rare decay B → K * μ + μ − which is affected by power corrections, the ratio R K is theoretically rather clean. We analyse all the b → sℓℓ data with global fits and in particular explore the possibility of breaking of lepton universality. Possible cross-checks with an analysis of the inclusive B → X s ℓ + ℓ − decay are also explored | Global fits to b → s ℓℓ data and signs for lepton non-universality | global fits to b → s ℓℓ data and signs for lepton non-universality | slight tensions latest lhcb measurements. besides anomaly observable rare discrepancy occurred. lhcb prediction. anomaly rare theoretically clean. analyse fits explore breaking lepton universality. checks inclusive explored | non_dup | [] |
35085304 | 10.1007/JHEP12(2014)056 | Recently, a perturbative duality between gauge and gravity theories (the double copy) has been discovered, that is believed to hold to all loop orders. In this paper, we examine the relationship between classical solutions of non-Abelian gauge theory and gravity. We propose a general class of gauge theory solutions that double copy to gravity, namely those involving stationary Kerr-Schild metrics. The Schwarzschild and Kerr black holes (plus their higher-dimensional equivalents) emerge as special cases. We also discuss plane wave solutions. Furthermore, a recently examined double copy between the self-dual sectors of Yang-Mills theory and gravity can be reinterpreted using a momentum-space generalisation of the Kerr-Schild framework | Black holes and the double copy | black holes and the double copy | perturbative duality copy discovered believed hold orders. examine abelian gravity. propose copy involving stationary kerr schild metrics. schwarzschild kerr holes equivalents emerge cases. solutions. copy sectors mills reinterpreted generalisation kerr schild | non_dup | [] |
35084946 | 10.1007/JHEP12(2014)065 | We derive new types of U(1) n Born-Infeld actions based on N = 2 special geometry in four dimensions. As in the single vector multiplet ( n = 1) case, the non-linear actions originate, in a particular limit, from quadratic expressions in the Maxwell fields. The dynamics is encoded in a set of coefficients d ABC related to the third derivative of the holomorphic prepotential and in an SU(2) triplet of N = 2 Fayet-Iliopoulos charges, which must be suitably chosen to preserve a residual N = 1 supersymmetry | N = 2 Born-Infeld attractors | n = 2 born-infeld attractors | derive born infeld dimensions. multiplet originate quadratic expressions maxwell fields. encoded holomorphic prepotential triplet fayet iliopoulos charges suitably preserve residual supersymmetry | non_dup | [] |
35085251 | 10.1007/JHEP12(2014)071 | We specialize the Wald formalism to derive the thermodynamical first law for static black holes with spherical/torus/hyperbolic symmetries in a variety of supergravities or supergravity-inspired theories involving multiple scalars and vectors. We apply the formula to study the first law of a general class of Lifshitz black holes. We analyse the first law of three exact Lifshitz black holes and the results fit the general pattern. In one example, the first law is TdS + Φ dQ = 0 where (Φ , Q ) are the electric potential and charge of the Maxwell field. The unusual vanishing of mass in this specific solution demonstrates that super-extremal charged black holes can exist in asymptotic Lifshitz spacetimes | Thermodynamics of Lifshitz black holes | thermodynamics of lifshitz black holes | specialize wald formalism derive thermodynamical holes spherical torus hyperbolic symmetries supergravities supergravity inspired involving scalars vectors. lifshitz holes. analyse lifshitz holes pattern. maxwell field. unusual vanishing demonstrates super extremal holes asymptotic lifshitz spacetimes | non_dup | [] |
33995787 | 10.1007/JHEP12(2014)073 | The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy sNN−−−√ = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < y cms < 3.53) and backward (−4.46 < y cms < −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σ ψ(2S), both integrated and as a function of the transverse momentum p T, for the two y cms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σ ψ(2S) /σ J/ψ ]pPb /[σ ψ(2S) /σ J/ψ ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production | Suppression of ψ(2S) production in p-Pb collisions at sNN−−−√\ud
= 5.02 TeV | suppression of ψ(2s) production in p-pb collisions at snn−−−√\ud = 5.02 tev | alice inclusive charmonium proton collisions nucleon nucleon snn−−−√ cern lhc. backward rapidities studying decays muon pairs. inclusive domains. proton proton collisions. modification inclusive quantity parton shadowing coherent mechanisms. suppression models. indication sizeable | non_dup | [] |
35085249 | 10.1007/JHEP12(2014)075 | We study the space of square-integrable harmonic forms over ALF gravitational instantons of type A K −1 and of type D K . We first calculate its dimension making use of a result by Hausel, Hunsicker and Mazzeo which relates the Hodge cohomology of a gravitational instanton M to the singular cohomology of a particular compactification X M of M . We then exhibit an explicit basis, exact for A K −1 and approximate for D K , and interpret geometrically the relations between M , X M and their cohomologies | Harmonic forms on ALF gravitational instantons | harmonic forms on alf gravitational instantons | integrable harmonic gravitational instantons hausel hunsicker mazzeo relates hodge cohomology gravitational instanton singular cohomology compactification exhibit approximate interpret geometrically cohomologies | non_dup | [] |
25048786 | 10.1007/JHEP12(2014)083 | At high enough charge density, the homogeneous state of the D3-D7' model is
unstable to fluctuations at nonzero momentum. We investigate the end point of
this instability, finding a spatially modulated ground state, which is a charge
and spin density wave. We analyze the phase structure of the model as a
function of chemical potential and magnetic field and find the phase transition
from the homogeneous state to be first order, with a second-order critical
point at zero magnetic field.Comment: 26 pages, 16 figures; v2: refs. fixed and added; v3: refs. and
discussion added, published versio | Gravity dual of spin and charge density waves | gravity dual of spin and charge density waves | homogeneous unstable nonzero momentum. instability spatially modulated wave. analyze homogeneous pages refs. refs. versio | non_dup | [] |
35084915 | 10.1007/JHEP12(2014)091 | The possibility of inter-layer exciton condensation in a holographic D3-probe-D5 brane model of a strongly coupled double monolayer Dirac semi-metal in a magnetic field is studied in detail. It is found that, when the charge densities on the layers are exactly balanced so that, at weak coupling, the Fermi surfaces of electrons in one monolayer and holes in the other monolayer would be perfectly nested, inter-layer condensates can form for any separation of the layers. The case where both monolayers are charge neutral is special. There, the inter-layer condensate occurs only for small separations and is replaced by an intra-layer exciton condensate at larger separations. The phase diagram for charge balanced monolayers for a range layer separations and chemical potentials is found. We also show that, in semi-metals with multiple species of massless fermions, the balance of charges required for Fermi surface nesting can occur spontaneously by breaking some of the internal symmetry of the monolayers. This could have important consequences for experimental attempts to find inter-layer condensates | Holographic D3-probe-D5 model of a double layer Dirac semimetal | holographic d3-probe-d5 model of a double layer dirac semimetal | exciton condensation holographic brane monolayer dirac detail. densities balanced fermi monolayer holes monolayer perfectly nested condensates layers. monolayers neutral special. condensate separations replaced intra exciton condensate separations. balanced monolayers separations potentials found. metals massless fermions balance charges fermi nesting spontaneously breaking monolayers. consequences attempts condensates | non_dup | [] |
35085765 | 10.1007/JHEP12(2014)108 | We investigate the prospects of discovering split Supersymmetry at a future 100 TeV proton-proton collider through the direct production of electroweakino next-to-lightest- supersymmetric-particles (NLSPs). We focus on signatures with multi-lepton and missing energy: 3ℓ, opposite-sign dileptons and same-sign dileptons. We perform a comprehensive study of different electroweakino spectra. A 100 TeV collider with 3000 / fb data is expected to exclude Higgsino thermal dark matter candidates with m LSP ~ 1 TeV if Wino NLSPs are lighter than about 3.2 TeV. The 3ℓ search usually offers the highest mass reach, which varies in the range of (2–4) TeV depending on scenarios. In particular, scenarios with light Higgsinos have generically simplified parameter dependences. We also demonstrate that, at a 100 TeV collider, lepton collimation becomes a crucial issue for NLSPs heavier than about 2.5 TeV. We finally compare our results with the discovery prospects of gluino pair productions and deduce which SUSY breaking model can be discovered first by electroweakino searches | Prospects for electroweakino discovery at a 100 TeV hadron collider | prospects for electroweakino discovery at a 100 tev hadron collider | prospects discovering split supersymmetry proton proton collider electroweakino lightest supersymmetric nlsps signatures lepton missing opposite dileptons dileptons. comprehensive electroweakino spectra. collider exclude higgsino candidates wino nlsps lighter tev. offers varies scenarios. scenarios higgsinos generically simplified dependences. collider lepton collimation crucial nlsps heavier tev. discovery prospects gluino productions deduce susy breaking discovered electroweakino searches | non_dup | [] |
25044408 | 10.1007/JHEP12(2014)111 | In this paper we discuss different recursion relations (BCFW and all-line
shift) for the form factors of the operators from the $\mathcal{N}=4$ SYM
stress-tensor current supermultiplet $T^{AB}$ in momentum twistor space. We
show that cancelations of spurious poles and equivalence between different
types of recursion relations can be naturally understood using geometrical
interpretation of the form factors as special limit of the volumes of polytopes
in $\mathbb{C}\mathbb{P}^4$ in close analogy with the amplitude case. We also
show how different relations for the IR pole coefficients can be easily derived
using momentum twistor representation. This opens an intriguing question -
which of powerful on-shell methods and ideas can survive off-shell ?Comment: 46 pages, 16 figures; v3: minor changes, typos in 3.37 and footnote 6
correcte | On Form Factors in N=4 SYM Theory and Polytopes | on form factors in n=4 sym theory and polytopes | recursion bcfw mathcal supermultiplet twistor space. cancelations spurious poles equivalence recursion naturally understood geometrical volumes polytopes mathbb mathbb analogy case. pole twistor representation. opens intriguing powerful ideas survive comment pages minor typos footnote correcte | non_dup | [] |
33088612 | 10.1007/JHEP12(2014)133 | Fermion boundary conditions play a relevant role in revealing the confinement mechanism of N=1 supersymmetric Yang-Mills theory with one compactified space-time dimension. A deconfinement phase transition occurs for a sufficiently small compactification radius, equivalent to a high temperature in the thermal theory where antiperiodic fermion boundary conditions are applied. Periodic fermion boundary conditions, on the other hand, are related to the Witten index and confinement is expected to persist independently of the length of the compactified dimension. We study this aspect with lattice Monte Carlo simulations for different values of the fermion mass parameter that breaks supersymmetry softly. We find a deconfined region that shrinks when the fermion mass is lowered. Deconfinement takes place between two confined regions at large and small compactification radii, that would correspond to low and high temperatures in the thermal theory. At the smallest fermion masses we find no indication of a deconfinement transition. These results are a first signal for the predicted continuity in the compactification of supersymmetric Yang-Mills theory | Compactified N = 1 supersymmetric Yang-Mills theory on the lattice: continuity and the disappearance of the deconfinement transition | compactified n = 1 supersymmetric yang-mills theory on the lattice: continuity and the disappearance of the deconfinement transition | fermion revealing confinement supersymmetric mills compactified dimension. deconfinement sufficiently compactification antiperiodic fermion applied. fermion witten confinement persist independently compactified dimension. aspect monte carlo fermion breaks supersymmetry softly. deconfined shrinks fermion lowered. deconfinement confined compactification radii theory. smallest fermion indication deconfinement transition. continuity compactification supersymmetric mills | non_dup | [] |
35086001 | 10.1007/JHEP12(2014)143 | As holographic description of BPS Wilson loops in N = 3 $$ \mathcal{N}=3 $$ flavored ABJM theory with N f = k = 1, BPS M2-branes in AdS 4 × N (1 , 1) are studied in details. Two 1 / 3-BPS membrane configurations are found. One of them is dual to the 1 / 3-BPS Wilson loop of Gaiotto-Yin type. The regulated membrane action captures precisely the leading exponential behavior of the vacuum expectation values of 1 / 3-BPS Wilson loops in the strong coupling limit, which was computed before using supersymmetric localization technique. Moreover, there is no BPS membrane with more supersymmetries in the background, under quite natural assumption on the membrane worldvolume. This suggests that there is no Wilson loop preserving more than 1/3 supersymmetries in such flavored ABJM theory | Holographical description of BPS Wilson loops in flavored ABJM theory | holographical description of bps wilson loops in flavored abjm theory | holographic wilson loops mathcal flavored abjm branes details. configurations found. wilson gaiotto type. regulated captures precisely exponential expectation wilson loops supersymmetric localization technique. supersymmetries worldvolume. wilson preserving supersymmetries flavored abjm | non_dup | [] |
25044864 | 10.1007/JHEP12(2014)145 | We present a prescription for obtaining the difference of the central
charges, c-a, of a four dimensional superconformal quantum field theory from
its single-trace index. The formula is derived from a one-loop holographic
computation, but is expected to be valid independent of holography. We
demonstrate the prescription with several holographic and non-holographic
examples. As an application of our formula, we show the AdS/CFT matching of c-a
for arbitrary toric quiver CFTs without adjoint matter that are dual to smooth
Sasaki-Einstein 5-manifolds.Comment: 19 pages. v2: minor changes, reference added. v3: minor
clarifications, published version. v4: a typo in Table 2 fixe | $c-a$ from the $N=1$ superconformal index | $c-a$ from the $n=1$ superconformal index | prescription obtaining charges superconformal trace index. holographic valid holography. prescription holographic holographic examples. matching toric quiver cfts adjoint sasaki einstein pages. minor added. minor clarifications version. typo fixe | non_dup | [] |
35085999 | 10.1007/JHEP12(2014)148 | Models of electroweak symmetry breaking with extended Higgs sectors are theoretically well motivated. In this study, we focus on models with a low energy spectrum containing a pair of charged scalars H ± , as well as a light scalar H and/or a pseudoscalar A . We study the H ± tb associated production with H ± → AW ± /HW ± , which could reach sizable branching fractions in certain parameter regions. With detailed collider analysis, we obtain the exclusion bounds as well as discovery reach at the 14 TeV LHC for the process pp → H ± tb → AW ± tb/HW ± tb → ττbbWW, bbbbWW . We find that for a daughter particle mass of 70 GeV, the 95% C.L. exclusion reach in σ × BR varies from about 60 fb to 25 fb, for m H ± ranging from 150 GeV to 500 GeV with 300 fb −1 integrated luminosity in the τ τ mode. We further interpret these bounds in the context of Type II Two Higgs Doublet Model. The exclusion region in the m H ± − tan β plane can be extended to m H ± = 600 GeV, while discovery is possible for m H ± ≲ 400 GeV with 300 fb −1 integrated luminosity. The exotic decay mode H ± → AW ± /HW ± offers a complementary channel to the conventional mode H ± → τν for charged Higgs searches | Charged Higgs search via AW ± /HW ± channel | charged higgs search via aw ± /hw ± channel | electroweak breaking sectors theoretically motivated. scalars pseudoscalar sizable branching fractions regions. collider exclusion bounds discovery ττbbww bbbbww daughter c.l. exclusion varies ranging luminosity mode. interpret bounds doublet model. exclusion discovery luminosity. exotic offers complementary searches | non_dup | [] |
35085770 | 10.1007/JHEP12(2014)149 | We construct a holographic model for a fermionic system on Q-lattice and compute the spectral function in the presence of a dipole coupling. Both key features of doped Mott insulators, the dynamical generation of a gap and spectral weight transfer, are observed when adjusting the value of the coupling parameter p . Of particular interest is that when the background is in a deep insulating phase, the Mott gap opens much easier with a smaller coupling parameter in comparison with a metallic background. The effects of lattice parameters on the width of the gap Δ /μ are studied and a turning point is observed near the critical regime of metal-insulator transitions of the background. Furthermore, the temperature dependence of the spectral function is studied. Finally, we also observe that the anisotropic Q-lattice generates anisotropic peaks with different magnitudes, indicating that insulating and metallic phases arise in different directions | Holographic fermionic system with dipole coupling on Q-lattice | holographic fermionic system with dipole coupling on q-lattice | holographic fermionic dipole coupling. doped mott insulators adjusting insulating mott opens easier metallic background. turning insulator background. studied. anisotropic generates anisotropic magnitudes insulating metallic arise directions | non_dup | [] |
35085661 | 10.1007/JHEP12(2014)151 | We propose a class of scalar models that, once coupled to gravity, lead to cosmologies that smoothly and stably connect an inflationary quasi-de Sitter universe to a low, or even zero-curvature, maximally symmetric spacetime in the asymptotic past, strongly violating the null energy condition H ⋅ ≫ H 2 $$ \left(\overset{\cdot }{H}\gg {H}^2\right) $$ at intermediate times. The models are deformations of the conformal galileon lagrangian and are therefore based on symmetries, both exact and approximate, that ensure the quantum robustness of the whole picture. The resulting cosmological backgrounds can be viewed as regularized extensions of the galilean genesis scenario, or, equivalently, as ‘early-time-complete’ realizations of inflation. The late-time inflationary dynamics possesses phenomenologically interesting properties: it can produce a large tensor-to-scalar ratio within the regime of validity of the effective field theory and can lead to sizeable equilateral nongaussianities | Inflation from Minkowski space | inflation from minkowski space | propose cosmologies smoothly stably connect inflationary quasi sitter universe curvature maximally spacetime asymptotic violating overset cdot times. deformations conformal galileon lagrangian symmetries approximate ensure robustness picture. cosmological backgrounds viewed regularized extensions galilean genesis equivalently ‘early complete’ realizations inflation. inflationary possesses phenomenologically validity sizeable equilateral nongaussianities | non_dup | [] |
35085963 | 10.1007/JHEP12(2014)160 | In this paper we study multi-gravity (multi-metric and multi-vielbein) theories in the presence of cycles of interactions (cycles in the so-called ‘theory graph’). It has been conjectured that in multi-metric theories such cycles lead to the introduction of a ghost-like instability, which, however, is absent in the multi-vielbein version of such theories. In this paper we answer this question in the affirmative by explicitly demonstrating the presence of the ghost in such multi-metric theories in the form of dangerous higher derivative terms in the decoupling limit Lagrangian; we also investigate the structure of interactions in the vielbein version of these theories and argue why the same ghost does not appear there. Finally we discuss the ramifications of our result on the dimensional deconstruction paradigm, which would seek an equivalence between such theories and a truncated Kaluza-Klein theory, and find that the impediment to taking the continuum limit due to a low strong-coupling scale is exacerbated by the presence of the ghost, when these theories are constructed using metrics | Cycles of interactions in multi-gravity theories | cycles of interactions in multi-gravity theories | vielbein cycles cycles ‘theory graph’ conjectured cycles ghost instability absent vielbein theories. answer affirmative explicitly demonstrating ghost dangerous decoupling lagrangian vielbein argue ghost there. ramifications deconstruction paradigm seek equivalence truncated kaluza klein impediment continuum exacerbated ghost metrics | non_dup | [] |
35085961 | 10.1007/JHEP12(2014)161 | An interpolating function F ˜ $$ \tilde{F} $$ between the a -anomaly coefficient in even dimensions and the free energy on an odd-dimensional sphere has been proposed recently and is conjectured to monotonically decrease along any renormalization group flow in continuous dimension d . We examine F ˜ $$ \tilde{F} $$ in the large- N CFT’s in d dimensions holographically described by the Einstein-Hilbert gravity in the AdS d +1 space. We show that F ˜ $$ \tilde{F} $$ is a smooth function of d and correctly interpolates the a coefficients and the free energies. The monotonicity of F ˜ $$ \tilde{F} $$ along an RG flow follows from the analytic continuation of the holographic c -theorem to continuous d , which completes the proof of the conjecture | Holographic interpolation between a and F | holographic interpolation between a and f | interpolating tilde anomaly sphere conjectured monotonically renormalization examine tilde cft’s holographically einstein hilbert space. tilde correctly interpolates energies. monotonicity tilde analytic continuation holographic completes conjecture | non_dup | [] |
25037660 | 10.1007/JHEP12(2014)163 | We perform a systematic analysis on supersymmetric states in N=4
supersymmetric Yang-Mills theory (SYM) on R x S^3. We find a new set of 1/16
BPS equations and determine the precise configuration of the supersymmetric
states by solving all 1/16 BPS equations when they are valued in Cartan
subalgebra of a gauge group and the fermionic fields vanish. We also determine
the number of supersymmetries preserved by the supersymmetric states varying
the parameters of the BPS solutions. As a byproduct we present the complete set
of such supersymmetric states in N=8 SYM on R x S^2 by carrying out dimensional
reduction.Comment: 37 pages, v2: typos corrected, comments and Acknowledgements adde | More on BPS States in N=4 Supersymmetric Yang-Mills Theory on R x S3 | more on bps states in n=4 supersymmetric yang-mills theory on r x s3 | supersymmetric supersymmetric mills precise supersymmetric solving valued cartan subalgebra fermionic vanish. supersymmetries preserved supersymmetric solutions. byproduct supersymmetric carrying pages typos corrected comments acknowledgements adde | non_dup | [] |
35085952 | 10.1007/JHEP12(2014)164 | We examine a recently proposed class of integrable deformations to two-dimensional conformal field theories. These λ -deformations interpolate between a WZW model and the non-Abelian T-dual of a Principal Chiral Model on a group G or, between a G/H gauged WZW model and the non-Abelian T-dual of the geometric coset G/H. λ -deformations have been conjectured to represent quantum group q -deformations for the case where the deformation parameter is a root of unity. In this work we show how such deformations can be given an embedding as full string backgrounds whose target spaces satisfy the equations of type-II supergravity. One illustrative example is a deformation of the S l 2 ℝ / U 1 $$ \mathrm{S}\mathrm{l}\left(2,\mathrm{\mathbb{R}}\right)/\mathrm{U}(1) $$ black-hole CFT. A further example interpolates between the S U 2 × S U 2 S U 2 × S L 2 ℝ × S L 2 ℝ S L 2 ℝ U 1 4 $$ \frac{\mathrm{SU}(2)\times \mathrm{S}\mathrm{U}(2)}{\mathrm{SU}(2)}\times \frac{\mathrm{SL}\left(2,\mathrm{\mathbb{R}}\right)\times \mathrm{S}\mathrm{L}\left(2,\mathrm{\mathbb{R}}\right)}{\mathrm{SL}\left(2,\mathrm{\mathbb{R}}\right)}\mathrm{U}{(1)}^4 $$ gauged WZW model and the non-Abelian T-dual of AdS 3 × S 3 × T 4 supported with Ramond flux | Spacetimes for λ -deformations | spacetimes for λ -deformations | examine integrable deformations conformal theories. deformations interpolate abelian principal chiral gauged abelian geometric coset deformations conjectured deformations deformation unity. deformations embedding backgrounds satisfy supergravity. illustrative deformation mathrm mathrm mathrm mathbb mathrm cft. interpolates frac mathrm mathrm mathrm mathrm frac mathrm mathrm mathbb mathrm mathrm mathrm mathbb mathrm mathrm mathbb mathrm gauged abelian ramond | non_dup | [] |
25060590 | 10.1007/JHEP12(2014)165 | In a previous paper, we analyzed the theory of massive fermions in the
fundamental representation coupled to a U(N) Chern-Simons gauge theory in three
dimensions at level K. It was done in the large N, large K limits where
Lambda=N/K was kept fixed. Among other results, we showed there that there are
no high mass quark anti-quark bound states. Here we show that there are no
bound states at all.Comment: 14 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:1306.6465. A reference and acknowledgement adde | Large N Chern-Simons with massive fundamental fermions - A model with no
bound states | large n chern-simons with massive fundamental fermions - a model with no bound states | massive fermions chern simons lambda kept fixed. states. pages figures. admin substantial overlap acknowledgement adde | non_dup | [] |
35085935 | 10.1007/JHEP12(2014)167 | We build a class of invisible axion models with tree-level Flavor Changing Neutral Currents completely controlled by the fermion mixing matrices. The scalar sector of these models contains three-Higgs doublets and a complex scalar gauge singlet, with the same fermionic content as in the Standard Model. A horizontal Peccei-Quinn symmetry provides a solution to the strong CP problem and predicts the existence of a very light and weakly coupled pseudo-Goldstone boson, the invisible axion or familon. A phenomenological analysis is performed taking into account familon searches in rare kaon and muon decays, astrophysical considerations and axion searches via axion-photon conversion. Drastic differences are found in the axion properties of different models due to the strong hierarchy of the CKM matrix, making some of the models considered much more constrained than others. We also obtain that a rich variety of these models avoid the domain wall problem. A possible mechanism to protect the solution to the strong CP problem against gravitational effects is also discussed | A class of invisible axion models with FCNCs at tree level | a class of invisible axion models with fcncs at tree level | build invisible axion flavor changing neutral currents fermion matrices. doublets singlet fermionic model. peccei quinn predicts weakly pseudo goldstone boson invisible axion familon. phenomenological familon searches rare kaon muon decays astrophysical considerations axion searches axion conversion. drastic axion hierarchy constrained others. avoid problem. protect gravitational | non_dup | [] |
35085916 | 10.1007/JHEP12(2014)171 | We show that partition function of Chern-Simons theory on three-sphere with classical and exceptional groups (actually on the whole corresponding lines in Vogel’s plane) can be represented as ratio of respectively triple and double sine functions (last function is essentially a modular quantum dilogarithm). The product representation of sine functions gives Gopakumar-Vafa structure form of partition function, which in turn gives a corresponding integer invariants of manifold after geometrical transition. In this way we suggest to extend gauge/string duality to exceptional groups, although one still have to resolve few problems. In both classical and exceptional cases an additional terms, non-perturbative w.r.t. the string coupling constant, appear. The full universal partition function of ChernSimons theory on three-sphere is shown to be the ratio of quadruple sine functions. We also briefly discuss the matrix model for exceptional line | On a Gopakumar-Vafa form of partition function of Chern-Simons theory on classical and exceptional lines | on a gopakumar-vafa form of partition function of chern-simons theory on classical and exceptional lines | partition chern simons sphere exceptional vogel’s triple sine essentially modular dilogarithm sine gopakumar vafa partition integer invariants manifold geometrical transition. extend duality exceptional resolve problems. exceptional perturbative w.r.t. appear. universal partition chernsimons sphere quadruple sine functions. briefly exceptional | non_dup | [] |
35085660 | 10.1007/JHEP12(2014)172 | We go a step further in the search for a consistent and realistic supergravity model of large-field inflation by building a class of models with the following features: during slow-roll, all the scalar fields other than the inflaton are frozen by large inflatondependent masses or removed from the spectrum; at the end of inflation, supersymmetry is spontaneously broken with naturally vanishing classical vacuum energy. We achieve this by combining some geometrical properties of the Kähler potential with the consistent use of a single nilpotent chiral superfield, in one-to-one correspondence with the supersymmetrybreaking direction in field space at the vacuum | On sgoldstino-less supergravity models of inflation | on sgoldstino-less supergravity models of inflation | realistic supergravity inflation slow roll inflaton frozen inflatondependent removed inflation supersymmetry spontaneously broken naturally vanishing energy. combining geometrical kähler nilpotent chiral superfield correspondence supersymmetrybreaking | non_dup | [] |
76524838 | 10.1007/JHEP12(2014)174 | We perform a systematic search for anti-de Sitter vacua of maximal supergravity with N>2 residual supersymmetries. We find that maximal supergravity admits two 1-parameter classes of N=3 and N=4 vacua, respectively. They are embedded, for the different values of an angular parameter, in the ω-rotated SO(8) (N=3) and SO(1, 7) ( N=4 and 3) gauged models. All vacua disappear in the ω → 0 limit. We determine the mass spectra and the AdS-supermultiplet structure. These appear to be the first and only N>2 supersymmetric AdS vacua in maximal supergravity, aside from the N=8 vacua of the SO(8)-gauged models. We also prove on general grounds that no such vacua can exist for 4<N< | The N > 2 supersymmetric AdS vacua in maximal supergravity | the n > 2 supersymmetric ads vacua in maximal supergravity | sitter vacua maximal supergravity residual supersymmetries. maximal supergravity admits vacua respectively. embedded rotated gauged models. vacua disappear limit. supermultiplet structure. supersymmetric vacua maximal supergravity aside vacua gauged models. grounds vacua | non_dup | [] |
35085905 | 10.1007/JHEP12(2014)175 | We employ methods of gauge/string duality to analyze the drag force on a heavy quark moving through a strongly coupled, anisotropic N $$ \mathcal{N} $$ = 4, SU( N ) super YangMills plasma in the presence of a finite U(1) chemical potential. We present numerical results valid for any value of the anisotropy parameter and the U(1) charge density and arbitrary direction of the quark velocity with respect to the direction of anisotropy. In the small anisotropy limit we are also able to furnish analytical results | Drag force in strongly coupled, anisotropic plasma at finite chemical potential | drag force in strongly coupled, anisotropic plasma at finite chemical potential | employ duality analyze drag moving anisotropic mathcal super yangmills potential. valid anisotropy anisotropy. anisotropy furnish | non_dup | [] |
25033303 | 10.1007/JHEP12(2014)178 | We study the ultraviolet behaviour of four-dimensional quantum field theories
involving non-abelian gauge fields, fermions and scalars in the Veneziano
limit. In a regime where asymptotic freedom is lost, we explain how the three
types of fields cooperate to develop fully interacting ultraviolet fixed
points, strictly controlled by perturbation theory. Extensions towards strong
coupling and beyond the large-N limit are discussed.Comment: 31 pages, 7 figures, explanations and references added, typos
corrected; to appear (JHEP | Asymptotic safety guaranteed | asymptotic safety guaranteed | ultraviolet involving abelian fermions scalars veneziano limit. asymptotic freedom lost cooperate interacting ultraviolet strictly perturbation theory. extensions pages explanations typos corrected jhep | non_dup | [] |
35085640 | 10.1007/JHEP12(2014)183 | We study the SU(3) gauge theory with twelve flavours of fermions in the fundamental representation as a prototype of non-Abelian gauge theories inside the conformal window. Guided by the pattern of underlying symmetries, chiral and conformal, we analyze the two-point functions theoretically and on the lattice, and determine the finite size scaling and the infinite volume fermion mass dependence of the would-be hadron masses. We show that the spectrum in the Coulomb phase of the system can be described in the context of a universal scaling analysis and we provide the nonperturbative determination of the fermion mass anomalous dimension γ ∗ = 0.235(46) at the infrared fixed point. We comment on the agreement with the four-loop perturbative prediction for this quantity and we provide a unified description of all existing lattice results for the spectrum of this system, them being in the Coulomb phase or the asymptotically free phase. Our results corroborate the view that the fixed point we are studying is not associated to a physical singularity along the bare coupling line and estimates of physical observables can be attempted on either side of the fixed point. Finally, we observe the restoration of the U(1) axial symmetry in the two-point functions | On the particle spectrum and the conformal window | on the particle spectrum and the conformal window | twelve flavours fermions prototype abelian conformal window. guided symmetries chiral conformal analyze theoretically infinite fermion hadron masses. coulomb universal nonperturbative fermion anomalous infrared point. comment perturbative quantity unified coulomb asymptotically phase. corroborate studying singularity bare observables attempted point. restoration axial | non_dup | [] |
29522131 | 10.1007/JHEP12(2015)002 | We propose a semiclassical method to calculate S-matrix elements for
two-stage gravitational transitions involving matter collapse into a black hole
and evaporation of the latter. The method consistently incorporates
back-reaction of the collapsing and emitted quanta on the metric. We illustrate
the method in several toy models describing spherical self-gravitating shells
in asymptotically flat and AdS space-times. We find that electrically neutral
shells reflect via the above collapse-evaporation process with probability
exp(-B), where B is the Bekenstein-Hawking entropy of the intermediate black
hole. This is consistent with interpretation of exp(B) as the number of black
hole states. The same expression for the probability is obtained in the case of
charged shells if one takes into account instability of the Cauchy horizon of
the intermediate Reissner-Nordstrom black hole. Our semiclassical method opens
a new systematic approach to the gravitational S-matrix in the non-perturbative
regime.Comment: 41 pages, 13 figures; Introduction rewritten, references added;
journal versio | Semiclassical S-matrix for black holes | semiclassical s-matrix for black holes | propose semiclassical gravitational involving collapse evaporation latter. consistently incorporates collapsing emitted quanta metric. illustrate describing spherical gravitating shells asymptotically times. electrically neutral shells reflect collapse evaporation bekenstein hawking hole. states. shells instability cauchy horizon reissner nordstrom hole. semiclassical opens gravitational perturbative pages rewritten versio | non_dup | [] |
29569030 | 10.1007/JHEP12(2015)003 | A standard candidate for quasilocal energy in general relativity is the
Brown-York energy, which is essentially a two dimensional surface integral of
the extrinsic curvature on the two-boundary of a spacelike hypersurface
referenced to flat spacetime. Several years back one of us had conjectured that
the black hole horizon is defined by equipartition of gravitational and
non-gravitational energy. By employing the above definition of quasilocal
Brown-York energy, we have verified the equipartition conjecture for static
charged and charged axi-symmetric blck holes in general relativity. We have
further generalized the Brown-York formalism to all orders in Lanczos-Lovelock
theories of gravity and have verified the conjecture for pure Lovelock charged
black hole in all even d=2m+2 dimensions, where m is the degree of Lovelock
action. It turns out that the equipartition conjecture works only for pure
Lovelock, and not for Einstein-Lovelock, black holes.Comment: v2, References added, 18 pages, No figure | Brown-York quasilocal energy in Lanczos-Lovelock gravity and black hole
horizons | brown-york quasilocal energy in lanczos-lovelock gravity and black hole horizons | candidate quasilocal relativity brown essentially extrinsic curvature spacelike hypersurface referenced spacetime. conjectured horizon equipartition gravitational gravitational energy. employing quasilocal brown verified equipartition conjecture blck holes relativity. brown formalism orders lanczos lovelock verified conjecture lovelock lovelock action. turns equipartition conjecture lovelock einstein lovelock pages | non_dup | [] |
29561600 | 10.1007/JHEP12(2015)004 | Since horizon formation in global anti-de Sitter spacetime is dual to
thermalization of a conformal field theory on a compact space, whether generic
initial data is stable or unstable against gravitational collapse is of great
interest. We argue that all the known stable initial data for massless scalars
are dominated by single scalar eigenmodes, specifically providing strong
numerical evidence consistent with the interpretation that initial data with
equal energies in two modes collapse on time scales of order the inverse square
of the amplitude. We further scan the parameter space for massive scalar field
initial data and present evidence for a novel class of stable or quasi-stable
solutions for massive scalars with energy spread through several eigenmodes.Comment: 31 pages v2. minor clarifications and updates to numerical results 31
pages v3. minor changes to match version published in JHE | Classes of Stable Initial Data for Massless and Massive Scalars in
Anti-de Sitter Spacetime | classes of stable initial data for massless and massive scalars in anti-de sitter spacetime | horizon sitter spacetime thermalization conformal generic unstable gravitational collapse great interest. argue massless scalars dominated eigenmodes collapse amplitude. scan massive quasi massive scalars spread pages minor clarifications updates pages minor match | non_dup | [] |
42648065 | 10.1007/JHEP12(2015)005 | Natural supersymmetric theories of the weak scale are under growing pressure
given present LHC constraints, raising the question of whether untuned
supersymmetric (SUSY) solutions to the hierarchy problem are possible. In this
paper, we explore a class of 5-dimensional natural SUSY theories in which SUSY
is broken by the Scherk-Schwarz mechanism. We pedagogically explain how
Scherk-Schwarz elegantly solves the traditional problems of 4-dimensional SUSY
theories (based on the MSSM and its many variants) that usually result in an
unsettling level of fine-tuning. The minimal Scherk-Schwarz set up possesses
novel phenomenology, which we briefly outline. We show that achieving the
observed physical Higgs mass motivates extra structure that does not
significantly affect the level of tuning (always better than $\sim 10\%$) and
we explore three qualitatively different extensions: the addition of extra
matter that couples to the Higgs, an extra $U(1)^\prime$ gauge group under
which the Higgs is charged and an NMSSM-like solution to the Higgs mass
problem.Comment: 36 pages + appendix, 12 figure | Natural Scherk-Schwarz Theories of the Weak Scale | natural scherk-schwarz theories of the weak scale | supersymmetric growing raising untuned supersymmetric susy hierarchy possible. explore susy susy broken scherk schwarz mechanism. pedagogically scherk schwarz elegantly solves traditional susy mssm variants unsettling fine tuning. scherk schwarz possesses phenomenology briefly outline. achieving motivates extra tuning explore qualitatively extensions extra couples extra prime nmssm pages | non_dup | [] |
29558845 | 10.1007/JHEP12(2015)006 | Till date, the only consistent description of the deconfinement phase of the
Sakai-Sugimoto model appears to be provided by the analysis of [1]
(arXiv:1107.4048). The current version of the analysis, however, has a subtlety
regarding the monodromy of quarks around the Euclidean time circle. In this
note, we revisit and resolve this issue by considering the effect of an
imaginary baryon chemical potential on quark monodromies. With this ingredient,
the proposal of [1] for investigating finite temperature QCD using holography
is firmly established. Additionally, our technique allows a holographic
computation of the free energy as a function of the imaginary chemical
potential in the deconfinement phase; we show that our result agrees with the
corresponding formula obtained from perturbative QCD, namely the Roberge-Weiss
potential.Comment: 18 pages, 2 figure | Thermodynamics of QCD from Sakai-Sugimoto Model | thermodynamics of qcd from sakai-sugimoto model | till deconfinement sakai sugimoto subtlety monodromy quarks euclidean circle. revisit resolve imaginary baryon monodromies. ingredient proposal investigating holography firmly established. additionally holographic imaginary deconfinement agrees perturbative roberge weiss pages | non_dup | [] |
29553527 | 10.1007/JHEP12(2015)007 | We investigate the implication of the recent discovery of a Higgs-like
particle in the first phase of the LHC Run 1 on the Inert Higgs Doublet Model
(IHDM). The determination of the Higgs couplings to SM particles and its
intrinsic properties will get improved during the new LHC Run 2 starting this
year. The new LHC Run 2 would also shade some light on the triple Higgs
coupling. Such measurement is very important in order to establish the details
of the electroweak symmetry breaking mechanism. Given the importance of the
Higgs couplings both at the LHC and $e^+e^-$
Linear Collider machines, accurate theoretical predictions are required. We
study the radiative corrections to the triple Higgs coupling $hhh$ and to
$hZZ$, $hWW$ couplings in the context of the IHDM. By combining several
theoretical and experimental constraints on parameter space, we show that extra
particles might modify the triple Higgs coupling near threshold regions.
Finally, we discuss the effect of these corrections on the double Higgs
production signal at the $e^+e^-$ LC and show that they can be rather
important.Comment: 25 pages, 10 figure | Radiative corrections to the Triple Higgs Coupling in the Inert Higgs
Doublet Model | radiative corrections to the triple higgs coupling in the inert higgs doublet model | implication discovery inert doublet ihdm couplings intrinsic year. shade triple coupling. establish electroweak breaking mechanism. couplings collider machines required. radiative triple couplings ihdm. combining extra modify triple regions. pages | non_dup | [] |
29556223 | 10.1007/JHEP12(2015)008 | We demonstrate that in the large N approach developed by the authors in
collaboration with Bardeen, the parameters B_6^{(1/2)} and B_8^{(3/2)}
parametrizing the K\to\pi\pi matrix elements <Q_6>_0 and <Q_8>_2 of the
dominant QCD and electroweak operators receive both negative O(1/N) corrections
such that B_6^{(1/2)} < B_8^{(3/2)}<1 in agreement with the recent lattice
results of the RBC-UKQCD collaboration. We also point out that the pattern of
the size of the hadronic matrix elements of all QCD and electroweak penguin
operators Q_i contributing to the K\to \pi \pi amplitudes A_0 and A_2, obtained
by this lattice collaboration, provides further support to our large N
approach. In particular, a very precise lattice result for the matrix element
<Q_8>_0 implies for the corresponding parameter B_8^{(1/2)}=1.0\pm 0.2 to be
compared with large N value B_8^{(1/2)}=1.1\pm 0.1. We discuss briefly the
implications of these findings for the ratio epsilon'/epsilon. In fact, with
the precise value for B_8^{(3/2)} from RBC-UKQCD collaboration, our upper bound
on B_6^{(1/2)} implies epsilon'/epsilon in the SM roughly by a factor of two
below its experimental value (16.6\pm 2.3)\times 10^{-4}. We also briefly
comment on the parameter \hat B_K and the \Delta I=1/2$ rule.Comment: 19 pages, Additional section on results from other large N approaches
added. References added. Conclusions unchanged. Matches the version to appear
in JHE | Upper Bounds on epsilon'/epsilon Parameters B_6^{(1/2)} and B_8^{(3/2)}
from Large N QCD and other News | upper bounds on epsilon'/epsilon parameters b_6^{(1/2)} and b_8^{(3/2)} from large n qcd and other news | bardeen parametrizing electroweak receive ukqcd collaboration. hadronic electroweak penguin contributing amplitudes approach. precise briefly epsilon epsilon. precise ukqcd epsilon epsilon roughly briefly comment delta pages added. added. unchanged. matches | non_dup | [] |
29557839 | 10.1007/JHEP12(2015)009 | Differential cross sections of deep inelastic scattering of charged leptons
from hadrons are investigated by using the gauge/string duality. We consider
vector mesons derived from different holographic dual models obtaining a
general expression. We focus on the strongly coupled regime of dual gauge
theories for different values of the Bjorken parameter. We find new predictions
which are particularly interesting for differential scattering cross sections
of polarized leptons scattered off polarized vector mesons. We also carry out a
detailed comparison of the moments of the structure functions with lattice QCD
results.Comment: 42 pages, 5 tables, 9 figure | Deep inelastic scattering cross sections from the gauge/string duality | deep inelastic scattering cross sections from the gauge/string duality | inelastic leptons hadrons duality. mesons holographic obtaining expression. bjorken parameter. polarized leptons scattered polarized mesons. carry moments pages tables | non_dup | [] |
29552069 | 10.1007/JHEP12(2015)010 | We calculate tree level scattering amplitudes for open strings using the NSR
formalism. We present a streamlined symmetry-based and pedagogical approach to
the computations, which we first develop by checking two-, three-, and
four-point functions involving bosons and fermions. We calculate the five-point
amplitude for massless gluons and find agreement with an earlier result by
Brandt, Machado and Medina. We then compute the five-point amplitudes involving
two and four fermions respectively, the general form of which has not been
previously obtained in the NSR formalism. The results nicely confirm
expectations from the supersymmetric $F^4$ effective action. Finally we use the
prescription of Kawai, Lewellen and Tye (KLT) to compute the amplitudes for the
closed string sector.Comment: 40+8 pages; v2: references added; v3: additional field theory checks
made; published version; v4: minor corrections; results unchange | Some tree-level string amplitudes in the NSR formalism | some tree-level string amplitudes in the nsr formalism | amplitudes strings formalism. streamlined pedagogical computations checking involving bosons fermions. massless gluons brandt machado medina. amplitudes involving fermions formalism. nicely confirm expectations supersymmetric action. prescription kawai lewellen amplitudes pages checks minor unchange | non_dup | [] |
29551501 | 10.1007/JHEP12(2015)011 | In previous papers we argued that mesons and baryons can be described as
rotating open strings in holographic backgrounds. Now we turn to closed
strings, which should be the duals of glueballs. We look at the rotating folded
closed string in both flat and curved backgrounds.
A basic prediction of the closed string model is that the slope of Regge
trajectories is half that of open strings. We propose that a simple method to
identify glueballs is to look for resonances that belong to trajectories with a
slope of approximately 0.45 GeV^-2, half the meson slope. We therefore look at
the experimental spectra of flavorless light mesons to see if such a scheme,
where some of the states are placed on open string trajectories and some on
closed ones, can fit known experimental data. We look at the f_0 (J^PC = 0^++)
and f_2 (2^++) resonances. As there is no preference for a single scheme of
sorting the different states into meson and glueball trajectories, we present
several possibilities, each identifying a different state as the glueball. We
supplement each scheme with predictions for the masses of excited glueballs.
We show that the width of the decay into two mesons is different for
glueballs and mesons thus providing a supplementary tool to distinguish between
them. In addition, we look at some lattice QCD results for glueball spectra and
check their compatibility with the closed string model.
One of the main conclusions of this paper is that an extension of
experimental data on the spectrum of flavorless hadrons is needed, in
particular in the region between around 2.4 GeV and 3 GeV.Comment: v1: 43 pages, v2: references added, 44 pages, v3: references added,
44 page | Glueballs as rotating folded closed strings | glueballs as rotating folded closed strings | papers argued mesons baryons rotating strings holographic backgrounds. strings duals glueballs. look rotating folded curved backgrounds. regge trajectories strings. propose glueballs look resonances belong trajectories meson slope. look flavorless mesons placed trajectories data. look resonances. preference sorting meson glueball trajectories possibilities identifying glueball. supplement excited glueballs. mesons glueballs mesons supplementary distinguish them. look glueball check compatibility model. flavorless hadrons pages pages | non_dup | [] |
42643492 | 10.1007/JHEP12(2015)012 | Recently the Schur index of ${\cal N}=4$ SYM was evaluated in closed form to
all orders including exponential corrections in the large $N$ expansion and for
fixed finite $N$. This was achieved by identifying the matrix model which
calculates the index with the partition function of a system of free fermions
on a circle. The index can be enriched by the inclusion of loop operators and
the case of Wilson loops is particularly easy, as it amounts to inserting extra
characters into the matrix model. The Fermi-gas approach is applied here to
this problem, the formalism is explored and explicit results at large $N$ are
found for the fundamental as well as a few other symmetric and antisymmetric
representations.Comment: 15 pages. 1 figur | The ${\cal N}=4$ Schur index with Polyakov loops | the ${\cal n}=4$ schur index with polyakov loops | schur orders exponential identifying calculates partition fermions circle. enriched inclusion wilson loops amounts inserting extra characters model. fermi formalism explored antisymmetric pages. figur | non_dup | [] |
42649761 | 10.1007/JHEP12(2015)013 | The BPS Skyrme model has many exact analytic solutions in flat space. We
generalize the model to a curved space or spacetime and find that the solutions
can only be BPS for a constant time-time component of the metric tensor. We
find exact solutions on the curved spaces: a 3-sphere and a 3-hyperboloid; and
we further find an analytic gravitating Skyrmion on the 3-sphere. For the case
of a nontrivial time-time component of the metric, we suggest a potential for
which we find analytic solutions on anti-de Sitter and de Sitter spacetimes in
the limit of no gravitational backreaction. We take the gravitational coupling
into account in numerical solutions and show that they are well approximated by
the analytic solutions for weak gravitational coupling.Comment: LaTeX: 27 pages, 6 figures; V2: typos correcte | Gravitating BPS Skyrmions | gravitating bps skyrmions | skyrme analytic space. generalize curved spacetime tensor. curved sphere hyperboloid analytic gravitating skyrmion sphere. nontrivial analytic sitter sitter spacetimes gravitational backreaction. gravitational approximated analytic gravitational latex pages typos correcte | non_dup | [] |
29539981 | 10.1007/JHEP12(2015)014 | We study the viability of regions of large $\tan \beta$ within the framework
of Fat Higgs/$\lambda$-SUSY Models. We compute the one-loop effective potential
to find the corrections to the Higgs boson mass due to the heavy non-standard
Higgs bosons. As the tree level contribution to the Higgs boson mass is
suppressed at large $\tan \beta$, these one-loop corrections are crucial to
raising the Higgs boson mass to the measured LHC value. By raising the Higgsino
and singlino mass parameters, typical electroweak precision constraints can
also be avoided. We illustrate these new regions of Fat Higgs/$\lambda$-SUSY
parameter space by finding regions of large $\tan \beta$ that are consistent
with all experimental constraints including direct dark matter detection
experiments, relic density limits and the invisible decay width of the $Z$
boson. We find that there exist regions around $\lambda = 1.25, \tan \beta =
50$ and a uniform psuedo-scalar $4~{\rm TeV} \lsim M_A \lsim 8$~TeV which are
consistent will all present phenomenological constraints. In this region the
dark matter relic abundance and direct detection limits are satisfied by a
lightest neutralino that is mostly bino or singlino. As an interesting aside we
also find a region of low $\tan \beta$ and small singlino mass parameter where
a well-tempered neutralino avoids all cosmological and direct detection
constraints.Comment: 35 pages, 15 figure | A 125 GeV Fat Higgs at large $\tan \beta$ | a 125 gev fat higgs at large $\tan \beta$ | viability beta lambda susy models. boson bosons. boson suppressed beta crucial raising boson value. raising higgsino singlino electroweak precision avoided. illustrate lambda susy beta relic invisible boson. lambda beta psuedo lsim lsim phenomenological constraints. relic abundance satisfied lightest neutralino mostly bino singlino. aside beta singlino tempered neutralino avoids cosmological pages | non_dup | [] |
42640173 | 10.1007/JHEP12(2015)015 | We study generic two-dimensional dilaton gravity with a Maxwell field and
prove its triviality for constant dilaton boundary conditions, despite of the
appearance of a Virasoro algebra with non-zero central charge. We do this by
calculating the canonical boundary charges, which turn out to be trivial, and
by calculating the quantum gravity partition function, which turns out to be
unity. We show that none of the following modifications changes our
conclusions: looser boundary conditions, non-linear interactions of the Maxwell
field with the dilaton, inclusion of higher spin fields, inclusion of generic
gauge fields. Finally, we consider specifically the charged Jackiw--Teitelboim
model, whose holographic study was pioneered by Hartman and Strominger, and
show that it is non-trivial for certain linear dilaton boundary conditions. We
calculate the entropy from the Euclidean path integral, using Wald's method and
exploiting the chiral Cardy formula. The macroscopic and microscopic results
for entropy agree with each other.Comment: added a reference; corrected typo | $AdS_2$ holography is (non-)trivial for (non-)constant dilaton | $ads_2$ holography is (non-)trivial for (non-)constant dilaton | generic dilaton maxwell triviality dilaton appearance virasoro charge. calculating canonical charges trivial calculating partition turns unity. none modifications looser maxwell dilaton inclusion inclusion generic fields. jackiw teitelboim holographic pioneered hartman strominger trivial dilaton conditions. euclidean wald exploiting chiral cardy formula. macroscopic microscopic agree corrected typo | non_dup | [] |
29567590 | 10.1007/JHEP12(2015)016 | We examine the partition function of N=2* supersymmetric SU(N) Yang-Mills
theory on the four-sphere in the large radius limit. We point out that the
large radius partition function, at fixed N, is computed by saddle points lying
on particular walls of marginal stability on the Coulomb branch of the theory
on R^4. For N an even (odd) integer and \theta_YM=0, (\pi), these include a
point of maximal degeneration of the Donagi-Witten curve to a torus where BPS
dyons with electric charge [N/2] become massless. We argue that the dyon
singularity is the lone saddle point in the SU(2) theory, while for SU(N) with
N>2, we characterize potentially competing saddle points by obtaining the
relations between the Seiberg-Witten periods at such points. Using Nekrasov's
instanton partition function, we solve for the maximally degenerate saddle
point and obtain its free energy as a function of g_YM and N, and show that the
results are "large-N exact". In the large-N theory our results provide
analytical expressions for the periods/eigenvalues at the maximally degenerate
saddle point, precisely matching previously known formulae following from the
correspondence between N=2* theory and the elliptic Calogero-Moser integrable
model. The maximally singular point ceases to be a saddle point of the
partition function above a critical value of the coupling, in agreement with
the recent findings of Russo and Zarembo.Comment: Replaced with version to appear in JHEP. Typos corrected, added
discussion on S-duality of the partition function. 47 pages, 8 figures, uses
late | Partition function of N=2* SYM on a large four-sphere | partition function of n=2* sym on a large four-sphere | examine partition supersymmetric mills sphere limit. partition saddle lying walls marginal coulomb branch integer theta maximal degeneration donagi witten torus dyons massless. argue dyon singularity lone saddle characterize potentially competing saddle obtaining seiberg witten points. nekrasov instanton partition solve maximally degenerate saddle expressions eigenvalues maximally degenerate saddle precisely matching formulae correspondence elliptic calogero moser integrable model. maximally singular ceases saddle partition russo replaced jhep. typos corrected duality partition function. pages | non_dup | [] |
29552559 | 10.1007/JHEP12(2015)017 | We study the partition function ${\cal N}=1$ 5D $U(N)$ gauge theory with $g$
adjoint hypermultiplets and show that for massless adjoint hypermultiplets it
is equal to the partition function of a two dimensional topological field on a
genus $g$ Riemann surface. We describe the topological field theory by its
amplitudes associated with cap, propagator and pair of pants. These basic
amplitudes are open topological string amplitudes associated with certain
Calabi-Yau threefolds in the presence of Lagrangian branes.Comment: 24 pages, clarifying remarks and references adde | Topological Field Theory Amplitudes for $A_{N-1}$ Fibration | topological field theory amplitudes for $a_{n-1}$ fibration | partition adjoint hypermultiplets massless adjoint hypermultiplets partition topological genus riemann surface. topological amplitudes propagator pants. amplitudes topological amplitudes calabi threefolds lagrangian pages clarifying remarks adde | non_dup | [] |
29569400 | 10.1007/JHEP12(2015)020 | Massive type IIA supergravity is shown to admit a consistent truncation on
the six-sphere to maximal supergravity in four dimensions with a dyonic ISO(7)
gauging. We obtain the complete, non-linear embedding of all the $D=4$ fields
into the IIA metric and form potentials, and show its consistency. We first
rewrite the IIA theory in an $\textrm{SO}(1,3) \times
\textrm{SL}(7)$--covariant way. Then, we employ an ${\cal N}=8$
SL(7)--covariant restriction of the $D=4$ tensor hierarchy in order to find the
full embedding. The redundant $D=4$ degrees of freedom introduced by the tensor
hierarchy can be eliminated by writing the embedding in terms of the field
strengths and exploiting the restricted duality hierarchy. In particular,
closed expressions for the Freund-Rubin term are found using this technique
which reveal a pattern valid for other truncations. Finally, we show that the
present ${\cal N}=8$ truncation of massive IIA on $S^6$ and the ${\cal N}=2$
truncation obtained when $S^6$ is equipped with its nearly-K\"ahler structure,
overlap in the ${\cal N}=1$, G$_2$--invariant sector of the former.Comment: 43 pages; v2: minor corrections and references added. Version to be
published in JHE | Consistent ${\cal N}=8$ truncation of massive IIA on $S^6$ | consistent ${\cal n}=8$ truncation of massive iia on $s^6$ | massive supergravity admit truncation sphere maximal supergravity dyonic gauging. embedding potentials consistency. rewrite textrm textrm covariant way. employ covariant restriction hierarchy embedding. redundant freedom hierarchy eliminated writing embedding strengths exploiting restricted duality hierarchy. expressions freund rubin reveal valid truncations. truncation massive truncation equipped nearly ahler overlap pages minor added. | non_dup | [] |
42640174 | 10.1007/JHEP12(2015)021 | We equip three-dimensional spin-3 gravity in the principal embedding with a
new set of boundary conditions that we call "asymptotically null warped AdS".
We find a chiral copy of the Polyakov-Bershadsky algebra as asymptotic symmetry
algebra, reminiscent of the situation in topologically massive gravity with
strict null warped AdS boundary conditions. We prove the invertibility of the
map between zuvielbein and metric variables and construct a global gauge
transformation to half of AdS spin-3 gravity in the diagonal embedding. This
explains why the theory is chiral and why the Polyakov-Bershadsky algebra
arises. We then introduce chemical potentials, derive the entropy, free energy,
and the holographic response functions, and conclude with a discussion | Null warped AdS in higher spin gravity | null warped ads in higher spin gravity | equip principal embedding call asymptotically warped chiral copy polyakov bershadsky asymptotic reminiscent topologically massive strict warped conditions. invertibility zuvielbein diagonal embedding. explains chiral polyakov bershadsky arises. potentials derive holographic | non_dup | [] |
29555591 | 10.1007/JHEP12(2015)023 | Sterile Neutrinos with a mass in the keV range form a good candidate for dark
matter. They are naturally produced from neutrino oscillations via their mixing
with the active neutrinos. However the production via non-resonant neutrino
oscillations has recently been ruled out. The alternative production via Higgs
decay is negligibly small compared to neutrino oscillations. We show that in
the neutrino-phillic two Higgs doublet model, the contribution from Higgs decay
can dominate over the contribution from neutrino oscillations and evade all
constraints. We also study the free-streaming horizon and find that a sterile
neutrino mass in the range of 4 to 53 keV leads to warm dark matter.Comment: 20 pages, 3 figures; v2: references added, Pauli blocking included,
leading to about 40% correction to DM abundance, freestreaming horizon
unaffected, conclusions unchanged, published in JHE | Sterile Neutrino Dark Matter Production in the Neutrino-phillic Two
Higgs Doublet Model | sterile neutrino dark matter production in the neutrino-phillic two higgs doublet model | sterile neutrinos candidate matter. naturally oscillations neutrinos. resonant oscillations ruled out. negligibly oscillations. phillic doublet dominate oscillations evade constraints. streaming horizon sterile warm pages pauli blocking abundance freestreaming horizon unaffected unchanged | non_dup | [] |
29548054 | 10.1007/JHEP12(2015)025 | The Hartle-Hawking wave function in cosmology can be viewed as a decaying
wave function with anti-de Sitter (AdS) boundary conditions. We show that the
growing wave function in AdS familiar from Euclidean AdS/CFT is equivalent,
semiclassically and up to surface terms, to the tunneling wave function in
cosmology. The cosmological measure in the tunneling state is given by the
partition function of certain relevant deformations of CFTs on a locally AdS
boundary. We compute the partition function of finite constant mass
deformations of the O(N) vector model on the round three sphere and show this
qualitatively reproduces the behaviour of the tunneling wave function in
Einstein gravity coupled to a positive cosmological constant and a massive
scalar. We find the amplitudes of inhomogeneities are not damped in the
holographic tunneling state.Comment: 22 pages, 5 figures, Revisions according to the JHEP edito | Holographic Tunneling Wave Function | holographic tunneling wave function | hartle hawking cosmology viewed decaying sitter conditions. growing familiar euclidean semiclassically tunneling cosmology. cosmological tunneling partition deformations cfts locally boundary. partition deformations round sphere qualitatively reproduces tunneling einstein cosmological massive scalar. amplitudes inhomogeneities damped holographic tunneling pages revisions jhep edito | non_dup | [] |
29564162 | 10.1007/JHEP12(2015)026 | We consider top-antitop quark ($t{\bar t}$) production at the Large Hadron
Collider (LHC) with subsequent decay into dileptonic and lepton plus jets final
states. We present a set of leptonic angular correlations and distributions
with which experiments can probe all the independent coefficient functions of
the top-spin dependent parts of the $t{\bar t}$ production spin density
matrices. We compute these angular correlations and distributions for LHC
center-of-mass energies 8, 13, and 14 TeV within the Standard Model at
next-to-leading order in the QCD coupling including the mixed QCD-weak
corrections and for the transverse top-quark polarization and the $t{\bar t}$
charge asymmetry also the mixed QCD-QED corrections. In addition we analyze and
compute the effects of new interactions on these observables in terms of a
gauge-invariant effective Lagrangian which contains all operators relevant for
hadronic $t{\bar t}$ production up to mass dimension six.Comment: Latex, 35 pages, sevaral comments and 2 tables added, version to be
published in JHE | A set of top quark spin correlation and polarization observables for the
LHC: Standard Model predictions and new physics contributions | a set of top quark spin correlation and polarization observables for the lhc: standard model predictions and new physics contributions | antitop hadron collider dileptonic lepton jets states. leptonic matrices. asymmetry corrections. analyze observables lagrangian hadronic latex pages sevaral comments tables | non_dup | [] |
42642435 | 10.1007/JHEP12(2015)027 | In this paper we investigate the holographic R\'enyi entropy in $\mathcal
N=1$ supergravity (SUGRA) in AdS$_3$ spacetime, which is dual to the
two-dimensional $\mathcal N=(1,1)$ superconformal field theory (SCFT). We
consider both cases of two short intervals on a line with zero temperature and
one interval on a circle with low temperature. In SUGRA side we consider
contributions of both graviton and gravitino, and in SCFT side we consider
contributions of both stress tensor $T$, $\bar T$ and their superpartners $G$,
$\bar G$. We find matches between SUGRA and SCFT results.Comment: V1, 19 pages; V2, 19 pages, publised versio | Holographic R\'enyi entropy for two-dimensional N=(1,1) superconformal
field theory | holographic r\'enyi entropy for two-dimensional n=(1,1) superconformal field theory | holographic enyi mathcal supergravity sugra spacetime mathcal superconformal scft intervals circle temperature. sugra graviton gravitino scft superpartners matches sugra scft pages pages publised versio | non_dup | [] |
29525541 | 10.1007/JHEP12(2015)028 | The exact quantum entropy of BPS black holes can be evaluated using
localization in supergravity. An important ingredient in this program, that has
been lacking so far, is the one-loop effect arising from the quadratic
fluctuations of the exact deformation (the $Q\mathcal{V}$ operator). We compute
the fluctuation determinant for vector multiplets and hyper multiplets around
$Q$-invariant off-shell configurations in four-dimensional $\mathcal{N}=2$
supergravity with $AdS_{2} \times S^{2}$ boundary conditions, using the
Atiyah-Bott fixed-point index theorem and a subsequent zeta function
regularization. Our results extend the large-charge on-shell entropy
computations in the literature to a regime of finite charges. Based on our
results, we present an exact formula for the quantum entropy of BPS black holes
in $\mathcal{N}=2$ supergravity. We explain cancellations concerning
$\frac18$-BPS black holes in $\mathcal{N}=8$ supergravity that were observed in
arXiv:1111.1161. We also make comments about the interpretation of a
logarithmic term in the topological string partition function in the low energy
supergravity theory.Comment: 47 pages; v3 accepted for publication in JHE | Functional determinants, index theorems, and exact quantum black hole
entropy | functional determinants, index theorems, and exact quantum black hole entropy | holes localization supergravity. ingredient lacking arising quadratic deformation mathcal fluctuation determinant multiplets hyper multiplets configurations mathcal supergravity atiyah bott zeta regularization. extend computations charges. holes mathcal supergravity. cancellations concerning frac holes mathcal supergravity comments logarithmic topological partition supergravity pages publication | non_dup | [] |
42644445 | 10.1007/JHEP12(2015)029 | We use exceptional field theory to establish a duality between certain
consistent 7-dimensional truncations with maximal SUSY from IIA to IIB. We use
this technique to obtain new consistent truncations of IIB on $S^3$ and
$H^{p,q}$ and work out the explicit reduction formulas in the internal sector.
We also present uplifts for other gaugings of 7-d maximal SUGRA, including
theories with a trombone gauging. Some of the latter can only be obtained by a
non-geometric compactification.Comment: 27 pages; v2: minor typos and references corrected, published version
(JHEP | Dualising consistent IIA / IIB truncations | dualising consistent iia / iib truncations | exceptional establish duality truncations maximal susy iib. truncations formulas sector. uplifts gaugings maximal sugra trombone gauging. geometric pages minor typos corrected jhep | non_dup | [] |
29548231 | 10.1007/JHEP12(2015)030 | Soft theorems for the form factors of 1/2-BPS and Konishi operator
supermultiplets are derived at tree level in N=4 SYM theory. They have a form
identical to the one in the amplitude case. For MHV sectors of stress tensor
and Konishi supermultiplets loop corrections to soft theorems are considered at
one loop level. They also appear to have universal form in soft limit. Possible
generalization of the on-shell diagrams to the form factors based on leading
soft behavior is suggested. Finally, we give some comments on inverse soft
limit and integrability of form factors in the limit $q^2\to 0$Comment: 55 pages, 15 figure | On Soft Theorems And Form Factors In N=4 SYM Theory | on soft theorems and form factors in n=4 sym theory | theorems konishi supermultiplets theory. case. sectors konishi supermultiplets theorems level. universal limit. generalization diagrams suggested. comments integrability comment pages | non_dup | [] |
29560003 | 10.1007/JHEP12(2015)031 | We study a new confining gauge theory with fermions in a vectorial
representation under the SM gauge group that allows for Yukawa interactions
with the Higgs. If the fermion masses are smaller than the confinement scale
this realizes a type I two Higgs doublet model where a composite Higgs mixes
with the elementary Higgs. This class of models interpolates between an
elementary and a composite Higgs and has interesting phenomenology with
potentially observables effects in collider physics, EDMs and SM couplings but
very weak bounds from indirect searches. The very same framework can be used to
realize the cosmological relaxation of the electro-weak scale recently
discussed in the literature.Comment: 16 pages. v2 minor changes; v3 typos fixe | The Half-composite Two Higgs Doublet Model and the Relaxion | the half-composite two higgs doublet model and the relaxion | confining fermions vectorial yukawa higgs. fermion confinement realizes doublet composite mixes elementary higgs. interpolates elementary composite phenomenology potentially observables collider edms couplings bounds indirect searches. realize cosmological relaxation electro pages. minor typos fixe | non_dup | [] |
29546092 | 10.1007/JHEP12(2015)032 | We study four-point functions in Chern-Simons vector models in the large $N$
limit. We compute the four-point function of the scalar primary to all orders
in the `t Hooft coupling $\lambda=N/k$ in $U(N)_k$ Chern-Simons theory coupled
to a fundamental fermion, in both the critical and non-critical theory, for a
particular case of the external momenta. These theories cover the entire
3-parameter "quasi-boson" and 2-parameter "quasi-fermion" families of
3-dimensional quantum field theories with a slightly-broken higher spin
symmetry. Our results are consistent with the celebrated bosonization duality,
as we explicitly verify by calculating four-point functions in the free
critical and non-critical bosonic theories.Comment: 20 pages, various improvement | A test of bosonization at the level of four-point functions in
Chern-Simons vector models | a test of bosonization at the level of four-point functions in chern-simons vector models | chern simons limit. orders hooft lambda chern simons fermion momenta. cover quasi boson quasi fermion families broken symmetry. celebrated bosonization duality explicitly verify calculating bosonic pages | non_dup | [] |
29544001 | 10.1007/JHEP12(2015)034 | A consistent interpretation of the Higgs data requires the same precision in
the Higgs boson masses and in the trilinear Higgs self-couplings, which are
related through their common origin from the Higgs potential. In this work we
provide the two-loop corrections at order ${\cal O}(\alpha_t \alpha_s)$ in the
approximation of vanishing external momenta to the trilinear Higgs
self-couplings in the CP-violating Next-to-Minimal Supersymmetric extension of
the Standard Model (NMSSM). In the top/stop sector two different
renormalization schemes have been implemented, the OS and the
$\overline{\text{DR}}$ scheme. The two-loop corrections to the self-couplings
are of the order of 10\% in the investigated scenarios. The theoretical error,
estimated both from the variation of the renormalization scale and from the
change of the top/stop sector renormalization scheme, has been shown to be
reduced due to the inclusion of the two-loop corrections.Comment: 31 pages, 7 figure | The Order $\mathcal{O}(\alpha_t\alpha_s)$ Corrections to the Trilinear
Higgs Self-Couplings in the Complex NMSSM | the order $\mathcal{o}(\alpha_t\alpha_s)$ corrections to the trilinear higgs self-couplings in the complex nmssm | precision boson trilinear couplings potential. alpha alpha vanishing momenta trilinear couplings violating supersymmetric nmssm stop renormalization schemes implemented overline scheme. couplings scenarios. renormalization stop renormalization inclusion pages | non_dup | [] |
29551492 | 10.1007/JHEP12(2015)036 | We continue the analysis of building open strings stretched between giant
gravitons from $\mathcal{N}=4$ SYM by going to second order in perturbation
theory using the three-loop dilatation generator from the field theory. In the
process we build a Fock-like space of states using Cuntz oscillators which can
be used to access the excited open string states. We find a remarkable
cancellation among the excited states that shows the ground state energy is
consistent with a fully relativistic dispersion relation.Comment: 33 pages. Typos fixe | Excited States of Open Strings From $\mathcal{N}=4$ SYM | excited states of open strings from $\mathcal{n}=4$ sym | continue strings stretched giant gravitons mathcal going perturbation dilatation generator theory. build fock cuntz oscillators excited states. remarkable cancellation excited relativistic pages. typos fixe | non_dup | [] |
29567365 | 10.1007/JHEP12(2015)038 | The top quark flavor changing neutral current (FCNC) process is an excellent
probe to search for new physics in top sector since the Standard Model
expectation is extremely suppressed. We explore Higgs-mediated top quark FCNC,
focusing on $H$-$t$-$c$ Yukawa coupling $\lambda_{ct}$ within the general two
Higgs doublet model. After electroweak symmetry breaking the top quark FCNC
couplings are included in the charged Higgs Yukawa sector so that they
contribute to various processes in flavor physics. To probe $\lambda_{ct}$, we
study anomalous single top production and the same sign top pair production at
the LHC in association with flavor physics from the tree-level processes $B\to
D^{(*)}\tau\nu$, $B\to \tau \nu$ as well as from the loop-level processes $B_d
\to X_s \gamma$, $B_{d,s}-{\overline B}_{d,s}$ mixing. We perform combined
analysis of all the constraints regarding the fine-tuning argument to fit the
data and discuss future prospect. The recently updated measurements on $B\to
D^{(*)}\tau\nu$ still prefer large $\lambda_{ct}$, but we show that the current
bound on the same sign top pair production at the LHC gives the most
significant upper bound on $\lambda_{ct}$ to be less than $10\sim30$ depending
on neutral heavy Higgs masses. We also find that for the given upper bound on
$\lambda_{ct}$, $B\to D^{(*)}\tau\nu$ put significant lower bound on
$H$-$\tau$-$\tau$ Yukawa coupling, and the bound is proportional to the charged
Higgs mass.Comment: 29 pages, 9 figures; modified version published in JHE | Exploring top quark FCNC within 2HDM type III in association with flavor
physics | exploring top quark fcnc within 2hdm type iii in association with flavor physics | flavor changing neutral fcnc excellent expectation extremely suppressed. explore fcnc focusing yukawa lambda doublet model. electroweak breaking fcnc couplings yukawa flavor physics. lambda anomalous flavor gamma overline mixing. fine tuning argument prospect. updated prefer lambda lambda neutral masses. lambda yukawa pages | non_dup | [] |
29557453 | 10.1007/JHEP12(2015)039 | We describe in detail how the spectrum of a single anti-D3-brane in
four-dimensional orientifolded IIB string models reproduces precisely the field
content of a nilpotent chiral superfield with the only physical component
corresponding to the fermionic goldstino. In particular we explicitly consider
a single anti-D3-brane on top of an O3-plane in warped throats, induced by
$(2,1)$ fluxes. More general systems including several anti-branes and other
orientifold planes are also discussed. This provides further evidence to the
claim that non-linearly realized supersymmetry due to the presence of
antibranes in string theory can be described by supersymmetric theories
including nilpotent superfields. Implications to the KKLT and related scenarios
of de Sitter moduli stabilization, to cosmology and to the structure of soft
SUSY-breaking terms are briefly discussed.Comment: 33 pages, 8 figures. v2: reference added, minor change | String Theory Realizations of the Nilpotent Goldstino | string theory realizations of the nilpotent goldstino | brane orientifolded reproduces precisely nilpotent chiral superfield fermionic goldstino. explicitly brane warped throats fluxes. branes orientifold planes discussed. claim linearly realized supersymmetry antibranes supersymmetric nilpotent superfields. kklt scenarios sitter moduli stabilization cosmology susy breaking briefly pages figures. minor | non_dup | [] |
29540941 | 10.1007/JHEP12(2015)040 | We investigate the lepton flavor violation (LFV) in the inert scalar model
with higher representations. We generalize the inert doublet model with right
handed neutrino by using higher scalar and fermion representation of
$SU(2)_{L}$. As the generalized model and the inert doublet model have the same
parameter space, we compare the rates of $\mu\rightarrow e\gamma$,
$\mu\rightarrow ee\overline{e}$ and $\mu-e$ conversion in nuclei in the doublet
and its immediate extension, the quartet model. We show that the corresponding
rates are larger in the case of higher representation compared to the Inert
doublet for the same region of parameter space. This implies that such extended
models are more constrained by current LFV bounds and will have better
prospects in future experiments.Comment: section 4 is improved by including the discussion on the Sommerfeld
enhancement. Version published in JHE | Lepton Flavor Violation in the Inert Scalar Model with Higher
Representations | lepton flavor violation in the inert scalar model with higher representations | lepton flavor violation inert representations. generalize inert doublet handed fermion inert doublet rightarrow gamma rightarrow overline conversion nuclei doublet immediate quartet model. inert doublet space. constrained bounds prospects sommerfeld enhancement. | non_dup | [] |
42647156 | 10.1007/JHEP12(2015)041 | The {\it dark matter} seem to be an inevitable ingredient of the total matter
configuration in the Universe and the knowledge how the {\it dark matter}
affects the properties of superconductors is of vital importance for the
experiments aimed at its direct detection. The homogeneous magnetic field
acting perpendicularly to the surface of (2+1) dimensional s-wave holographic
superconductor in the theory with {\it dark matter} sector has been modeled by
the additional $U(1)$-gauge field representing dark matter and coupled to the
Maxwell one. As expected the free energy for the vortex configuration turns out
to be negative. Importantly its value is lower in the presence of {\it dark
matter} sector. This feature can explain why in the Early Universe first the
web of {\it dark matter} appeared and next on these gratings the ordinary
matter forming cluster of galaxies has formed.Comment: 23 pages, JHEP-styl | Holographic vortices in the presence of dark matter sector | holographic vortices in the presence of dark matter sector | seem inevitable ingredient universe affects superconductors vital aimed detection. homogeneous acting perpendicularly holographic superconductor modeled representing maxwell one. vortex turns negative. importantly sector. universe appeared gratings ordinary forming pages jhep styl | non_dup | [] |
29548208 | 10.1007/JHEP12(2015)043 | We study the shape dependence of entanglement entropy (EE) by deforming
symmetric entangling surfaces. We show that entangling surfaces with a
rotational or translational symmetry extremize (locally) the EE with respect to
shape deformations that break some of the symmetry (i.e. the 1st order
correction vanishes). This result applies to EE and Renyi entropy for any QFT
in any dimension. Using Solodukhin's formula in $4d$ and holography in any $d$,
we calculate the 2nd order correction to the universal EE for CFTs and simple
symmetric entangling surfaces. In all cases we find that the 2nd order
correction is positive, and thus the corresponding symmetric entangling surface
is a local minimum. Some of the results are extended to free massive fields and
to 4d Renyi entropy.Comment: 24 pages, 2 figures, minor changes, added reference | On the Shape Dependence of Entanglement Entropy | on the shape dependence of entanglement entropy | entanglement deforming entangling surfaces. entangling rotational translational extremize locally deformations break i.e. vanishes applies renyi dimension. solodukhin holography universal cfts entangling surfaces. entangling minimum. massive renyi pages minor | non_dup | [] |
29568639 | 10.1007/JHEP12(2015)044 | The simplest Higgs-portal scalar dark matter model, in which a real scalar
singlet is added to the standard model, has been revisited, by taking into
account the constraints from perturbativity, electroweak vacuum stability in
the early Universe, dark matter direct detection, and Higgs invisible decay at
the LHC. We show that the {\it resonant mass region} is totally excluded and
the {\it high mass region} is reduced to a narrow window $1.1$ ~TeV $\leq m_{s}
\leq$ $ 2.55$~ TeV, which is slightly reduced to $1.1$~TeV $\leq m_{s} \leq$ $
2.0$~ TeV if the perturbativity is further imposed. This {\it high mass range}
can be fully detected by the Xenon 1T experiment.Comment: 14 pages, 6 figures; v2: title changed, typos corrected and
references added; v3 minor changes, journal versio | New Constraints on Higgs-portal Scalar Dark Matter | new constraints on higgs-portal scalar dark matter | simplest portal singlet revisited perturbativity electroweak universe invisible lhc. resonant totally excluded narrow window perturbativity imposed. xenon pages title changed typos corrected minor versio | non_dup | [] |
29557983 | 10.1007/JHEP12(2015)045 | We show that natural noncommutative gauge theory models on
$\mathbb{R}^3_\lambda$ can accommodate gauge invariant harmonic terms, thanks
to the existence of a relationship between the center of $\mathbb{R}^3_\lambda$
and the components of the gauge invariant 1-form canonical connection. This
latter object shows up naturally within the present noncommutative differential
calculus. Restricting ourselves to positive actions with covariant coordinates
as field variables, a suitable gauge-fixing leads to a family of matrix models
with quartic interactions and kinetic operators with compact resolvent. Their
perturbative behavior is then studied. We first compute the 2-point and 4-point
functions at the one-loop order within a subfamily of these matrix models for
which the interactions have a symmetric form. We find that the corresponding
contributions are finite. We then extend this result to arbitrary order. We
find that the amplitudes of the ribbon diagrams for the models of this
subfamily are finite to all orders in perturbation. This result extends finally
to any of the models of the whole family of matrix models obtained from the
above gauge-fixing. The origin of this result is discussed. Finally, the
existence of a particular model related to integrable hierarchies is indicated,
for which the partition function is expressible as a product of ratios of
determinants.Comment: 27 page | Noncommutative gauge theories on $\mathbb{R}^3_\lambda$: Perturbatively
finite models | noncommutative gauge theories on $\mathbb{r}^3_\lambda$: perturbatively finite models | noncommutative mathbb lambda accommodate harmonic thanks mathbb lambda canonical connection. naturally noncommutative calculus. restricting covariant fixing quartic resolvent. perturbative studied. subfamily form. finite. extend order. amplitudes ribbon diagrams subfamily orders perturbation. extends fixing. discussed. integrable hierarchies partition expressible | non_dup | [] |
42644404 | 10.1007/JHEP12(2015)046 | Solutions to the strong CP problem typically introduce new scales associated
with the spontaneous breaking of symmetries. Absent any anthropic argument for
small $\bar\theta$, these scales require stabilization against ultraviolet
corrections. Supersymmetry offers a tempting stabilization mechanism, since it
can solve the "big" electroweak hierarchy problem at the same time. One family
of solutions to strong CP, including generalized parity models, heavy axion
models, and heavy $\eta^\prime$ models, introduces $\mathbb{Z}_2$ copies of
(part of) the Standard Model and an associated scale of
$\mathbb{Z}_2$-breaking. We review why, without additional structure such as
supersymmetry, the $\mathbb{Z}_2$-breaking scale is unacceptably tuned. We then
study "SUZ$_2$" models, supersymmetric theories with $\mathbb{Z}_2$ copies of
the MSSM. We find that the addition of SUSY typically destroys the
$\mathbb{Z}_2$ protection of $\bar\theta=0$, even at tree level, once SUSY and
$\mathbb{Z}_2$ are broken. In theories like supersymmetric completions of the
twin Higgs, where $\mathbb{Z}_2$ addresses the little hierarchy problem but not
strong CP, two axions can be used to relax $\bar\theta$.Comment: 18 pp, v2: refs adde | Strong CP and SUZ$_2$ | strong cp and suz$_2$ | spontaneous breaking symmetries. absent anthropic argument theta stabilization ultraviolet corrections. supersymmetry offers tempting stabilization solve electroweak hierarchy time. parity axion prime introduces mathbb copies mathbb breaking. supersymmetry mathbb breaking unacceptably tuned. supersymmetric mathbb copies mssm. susy destroys mathbb protection theta susy mathbb broken. supersymmetric completions twin mathbb addresses hierarchy axions relax theta .comment refs adde | non_dup | [] |
29554136 | 10.1007/JHEP12(2015)049 | We derive the part of the Lagrangian for the sigma model on the eta-deformed
AdS_5 x S^5 space which is quadratic in fermions and has the full dependence on
bosons. We then show that there exists a field redefinition which brings the
corresponding Lagrangian to the standard form of type IIB Green-Schwarz
superstring. Reading off the corresponding RR couplings, we observe that they
fail to satisfy the supergravity equations of motion, despite the presence of
kappa-symmetry. However, in a special scaling limit our solution reproduces the
supergravity background found by Maldacena and Russo. Further, using the
fermionic Lagrangian, we compute a number of new matrix elements of the tree
level world-sheet scattering matrix. We then show that after a unitary
transformation on the basis of two-particle states which is not one-particle
factorisable, the corresponding T-matrix factorises into two equivalent parts.
Each part satisfies the classical Yang-Baxter equation and coincides with the
large tension limit of the q-deformed S-matrix.Comment: 59 pages, 1 figure, v2: minor correction | Puzzles of eta-deformed AdS_5 x S^5 | puzzles of eta-deformed ads_5 x s^5 | derive lagrangian sigma deformed quadratic fermions bosons. redefinition brings lagrangian schwarz superstring. reading couplings fail satisfy supergravity kappa symmetry. reproduces supergravity maldacena russo. fermionic lagrangian sheet matrix. unitary factorisable factorises parts. satisfies baxter coincides tension deformed pages minor | non_dup | [] |
25038295 | 10.1007/JHEP12(2015)052 | It has been proposed recently that interacting Symmetry Protected Topological
(SPT) phases can be classified using cobordism theory. We test this proposal in
the case of fermionic SPT phases with Z/2 symmetry, where Z/2 is either
time-reversal or an internal symmetry. We find that cobordism classification
correctly describes all known fermionic SPT phases in space dimension less than
or equal to 3 and also predicts that all such phases can be realized by free
fermions. In higher dimensions we predict the existence of inherently
interacting fermionic SPT phases.Comment: 26 pages, new references added and a new section on decorated domain
walls in v | Fermionic Symmetry Protected Topological Phases and Cobordisms | fermionic symmetry protected topological phases and cobordisms | interacting protected topological classified cobordism theory. proposal fermionic reversal symmetry. cobordism correctly describes fermionic predicts realized fermions. predict inherently interacting fermionic pages decorated walls | non_dup | [] |
29566579 | 10.1007/JHEP12(2015)053 | The walking technicolor based on the ladder Schwinger-Dyson gap equation is
studied, with the scale-invariant coupling being an idealization of the
Caswell-Banks-Zaks infrared fixed point in the "anti-Veneziano limit", such
that $N_C \rightarrow \infty$ with $N_C \cdot \alpha(\mu^2)=$ fixed and
$N_F/N_C=$ fixed ($\gg 1$), of the $SU(N_C)$ gauge theory with massless $N_F$
flavors near criticality. We show that the 125 GeV Higgs can be naturally
identified with the technidilaton (TD) predicted in the walking technicolor, a
pseudo Nambu-Goldstone (NG) boson of the spontaneous symmetry breaking of the
approximate scale symmetry. Ladder calculations yield the TD mass $M_\phi$ from
the trace anomaly as $M_\phi^2 F_\phi^2= -4 \langle \theta_\mu^\mu \rangle = -
\frac{\beta(\alpha (\mu^2))}{\alpha(\mu^2)}\, \langle G_{\lambda
\nu}^2(\mu^2)\rangle \simeq N_C N_F\frac{16}{\pi^4} m_F^4$, independently of
the renormalization point $\mu$, where $m_F$ is the dynamical mass of the
technifermion, and $F_\phi={\cal O} (\sqrt{N_F N_C}\, m_F)$ the TD decay
constant. It reads $M_\phi^2\simeq (\frac{v_{\rm EW}}{2} \cdot \frac{5 v_{\rm
EW}}{F_\phi})^2 \cdot [\frac{8}{N_F}\frac{4}{N_C}]$, ($v_{\rm EW}=246$ GeV),
which implies $F_\phi\simeq 5 \,v_{\rm EW} $ for $M_\phi \simeq 125\, {\rm
GeV}\simeq \frac{1}{2} v_{\rm EW}$ in the one-family model ($N_C=4, N_F=8$), in
good agreement with the current LHC Higgs data. The result reflects a generic
scaling $ M_\phi^2/v_{\rm EW}^2\sim M_\phi^2/F_\phi^2 \sim m_F^2 /F_\phi^2 \sim
1/(N_F N_C) \rightarrow 0 $ as a vanishing trace anomaly, namely the TD has a
mass vanishing in the anti-Veneziano limit, similarly to $\eta^\prime$ meson as
a pseudo-NG boson of the ordinary QCD with vanishing $U(1)_A$ anomaly in the
Veneziano limit ($N_F/N_C \ll 1$).Comment: revtex4, 36 pages, 7 eps figures, some corrections made, references
added; a version to appear in JHEP; typo correcte | Walking on the Ladder: 125 GeV Technidilaton, or Conformal Higgs
-Dedicated to the late Professor Yoichiro Nambu- | walking on the ladder: 125 gev technidilaton, or conformal higgs -dedicated to the late professor yoichiro nambu- | walking technicolor ladder schwinger dyson idealization caswell banks zaks infrared veneziano rightarrow infty cdot alpha massless flavors criticality. naturally technidilaton walking technicolor pseudo nambu goldstone boson spontaneous breaking approximate symmetry. ladder trace anomaly langle theta rangle frac beta alpha alpha langle lambda rangle simeq frac independently renormalization technifermion sqrt constant. reads simeq frac cdot frac cdot frac frac simeq simeq simeq frac data. reflects generic rightarrow vanishing trace anomaly vanishing veneziano prime meson pseudo boson ordinary vanishing anomaly veneziano .comment revtex pages jhep typo correcte | non_dup | [] |
42637575 | 10.1007/JHEP12(2015)057 | We outline a program for interpreting the higher-spin dS/CFT model in terms
of physics in the causal patch of a dS observer. The proposal is formulated in
"elliptic" de Sitter space dS_4/Z_2, obtained by identifying antipodal points
in dS_4. We discuss recent evidence that the higher-spin model is especially
well-suited for this, since the antipodal symmetry of bulk solutions has a
simple encoding on the boundary. For context, we test some other (free and
interacting) theories for the same property. Next, we analyze the notion of
quantum field states in the non-time-orientable dS_4/Z_2. We compare the
physics seen by different observers, with the outcome depending on whether they
share an arrow of time. Finally, we implement the marriage between higher-spin
holography and observers in dS_4/Z_2, in the limit of free bulk fields. We
succeed in deriving an observer's operator algebra and Hamiltonian from the
CFT, but not her S-matrix. We speculate on the extension of this to interacting
higher-spin theory.Comment: 58 pages + 7 pages of appendices, 3 figure | Holography and quantum states in elliptic de Sitter space | holography and quantum states in elliptic de sitter space | outline interpreting causal patch observer. proposal formulated elliptic sitter identifying antipodal suited antipodal encoding boundary. interacting property. analyze notion orientable observers share arrow time. implement marriage holography observers fields. succeed deriving observer matrix. speculate interacting pages pages appendices | non_dup | [] |
29568856 | 10.1007/JHEP12(2015)058 | We investigate N$_f$ = 1 QCD in external magnetic fields on the lattice. The
background field is introduced by means of the so-called Schrodinger
functional. We adopt standard staggered fermions with constant bare mass $am =
0.025$ and magnetic fields with constant magnetic flux up to $a^2 e H \simeq
2.3562$. We find that the the deconfinement and chiral symmetry restoration
temperatures do not depend on the strength of the applied magnetic field. Our
method allow us to easily study the effects of the external magnetic fields on
the QCD thermodynamics. We determine the influences of applied magnetic fields
to the free energy, pressure, and equation of state of strongly interacting
matter.Comment: 21 pages, 11 figures; revised version accepted for publication in
JHE | N$_f$ = 1 QCD in External Magnetic Fields: Staggered Fermions | n$_f$ = 1 qcd in external magnetic fields: staggered fermions | lattice. schrodinger functional. adopt staggered fermions bare simeq deconfinement chiral restoration field. thermodynamics. influences interacting pages revised publication | non_dup | [] |
42637090 | 10.1007/JHEP12(2015)063 | We derive the decay rate of an unstable phase of a quantum field theory in
the presence of an impurity in the thin-wall approximation. This derivation is
based on the how the impurity changes the (flat spacetime) geometry relative to
case of pure false vacuum. Two examples are given that show how to estimate
some of the additional parameters that enter into this heterogeneous decay
rate. This formalism is then applied to the Higgs vacuum of the Standard Model
(SM), where baryonic matter acts as an impurity in the electroweak Higgs
vacuum. We find that the probability for heterogeneous vacuum decay to occur is
suppressed with respect to the homogeneous case. That is to say, the
conclusions drawn from the homogeneous case are not modified by the inclusion
of baryonic matter in the calculation. On the other hand, we show that Beyond
the Standard Model physics with a characteristic scale comparable to the scale
that governs the homogeneous decay rate in the SM, can in principle lead to an
enhanced decay rate.Comment: v3: version published in JHEP, very minor changes from v | Semiclassical Approach to Heterogeneous Vacuum Decay | semiclassical approach to heterogeneous vacuum decay | derive unstable impurity approximation. derivation impurity spacetime false vacuum. enter heterogeneous rate. formalism baryonic acts impurity electroweak vacuum. heterogeneous suppressed homogeneous case. drawn homogeneous inclusion baryonic calculation. comparable governs homogeneous jhep minor | non_dup | [] |
29558404 | 10.1007/JHEP12(2015)064 | We examine the phase structure of massive Yang-Mills theory in 1+1
dimensions. This theory is equivalent to a gauged principal chiral sigma model.
It has been previously shown that the gauged theory has only a confined phase,
and no Higgs phase in the continuum, and at infinite volume. There are no
massive gluons, but only hadron-like bound states of sigma-model particles. The
reason is that the gluon mass diverges, being proportional to the two-point
correlation function of the renormalized field of the sigma model at $x=0$. We
use exact large-$N$ results to show that after introducing a lattice
regularization and typical values of the coupling constants used in Monte Carlo
simulations, the gluon mass becomes finite, and even sometimes small. A smooth
crossover into a Higgs phase can then appear. For small volumes and large $N$,
we find an analytic expression for the gluon mass, which depends on the
coupling constants and the volume. We argue that this Higgs phase is
qualitatively similar to the one observed in lattice computations at $N=2$.Comment: Version accepted for publication in JHEP. Improved discussion of
results, references adde | Confinement-Higgs Phase Crossover as a Lattice Artifact in 1+1
Dimensions | confinement-higgs phase crossover as a lattice artifact in 1+1 dimensions | examine massive mills dimensions. gauged principal chiral sigma model. gauged confined continuum infinite volume. massive gluons hadron sigma particles. gluon diverges renormalized sigma introducing regularization monte carlo gluon sometimes small. crossover appear. volumes analytic gluon volume. argue qualitatively computations .comment publication jhep. adde | non_dup | [] |
42640758 | 10.1007/JHEP12(2015)065 | In this work we present a new subtraction method for next-to-leading order
calculations that is particularly convenient even when narrow resonances are
present. The method is particularly suitable for the implementation of
next-to-leading order calculations matched to parton shower generators. It
allows at the same time for the inclusion of all finite width effects,
including interferences, and for a consistent treatment of resonances in the
shower approach, preserving the mass of resonances near their peak. We
implement our method, in a fully general and automatic way, within the POWHEG
BOX framework, and illustrate it using as a test case the process of $p p \to
\mu^+ \nu_\mu j_b j$, that is dominated by $t$-channel single top production.Comment: 48 pages, 21 figure | On the Treatment of Resonances in Next-to-Leading Order Calculations
Matched to a Parton Shower | on the treatment of resonances in next-to-leading order calculations matched to a parton shower | subtraction convenient narrow resonances present. matched parton shower generators. inclusion interferences resonances shower preserving resonances peak. implement automatic powheg illustrate dominated pages | non_dup | [] |
42641748 | 10.1007/JHEP12(2015)067 | We derive exact scaling relations for two-dimensional relativistic
hydrodynamic turbulence in the inertial range of scales. We consider both the
energy cascade towards large scales and the enstrophy cascade towards small
scales. We illustrate these relations by numerical simulations of turbulent
weakly compressible flows. Intriguingly, the fluid-gravity correspondence
implies that the gravitational field in spacetimes with anti-de Sitter
asymptotics should exhibit similar scaling relations.Comment: 22 pages, 9 figures, minor typos correcte | Scaling Relations in Two-Dimensional Relativistic Hydrodynamic
Turbulence | scaling relations in two-dimensional relativistic hydrodynamic turbulence | derive relativistic hydrodynamic turbulence inertial scales. cascade enstrophy cascade scales. illustrate turbulent weakly compressible flows. intriguingly correspondence gravitational spacetimes sitter asymptotics exhibit pages minor typos correcte | non_dup | [] |
42637389 | 10.1007/JHEP12(2015)069 | We compute the new supersymmetric index of a large class of N=2 heterotic
compactifications with torsion, corresponding to principal two-torus bundles
over warped K3 surfaces with H-flux. Starting from a UV description as a (0,2)
gauged linear sigma-model with torsion, we use supersymmetric localization
techniques to provide an explicit expression of the index as a sum over the
Jeffrey-Kirwan residues of the one-loop determinant. We finally propose a
geometrical formula that gives the new supersymmetric index in terms of bundle
data, regardless of any particular choice of underlying two-dimensional theory.Comment: 53 pages. Version 2 to be published in JHEP: added proof of the
geometrical formula for the quartic, few minor clarifications and typos
correcte | New supersymmetric index of heterotic compactifications with torsion | new supersymmetric index of heterotic compactifications with torsion | supersymmetric heterotic compactifications torsion principal torus bundles warped flux. gauged sigma torsion supersymmetric localization jeffrey kirwan determinant. propose geometrical supersymmetric bundle regardless pages. jhep geometrical quartic minor clarifications typos correcte | non_dup | [] |
42638118 | 10.1007/JHEP12(2015)070 | In quantum field theories with topological sectors, a non-perturbative
quantity of interest is the topological susceptibility chi_t. In principle it
seems straightforward to measure chi_t by means of Monte Carlo simulations.
However, for local update algorithms and fine lattice spacings, this tends to
be difficult, since the Monte Carlo history rarely changes the topological
sector. Here we test a method to measure chi_t even if data from only one
sector are available. It is based on the topological charges in sub-volumes,
which we denote as slabs. Assuming a Gaussian distribution of these charges,
this method enables the evaluation of chi_t, as we demonstrate with numerical
results for non-linear sigma-models.Comment: 23 pages, 8 figures, 6 table | Topological Susceptibility from Slabs | topological susceptibility from slabs | topological sectors perturbative quantity topological susceptibility straightforward monte carlo simulations. update fine spacings tends monte carlo rarely topological sector. available. topological charges volumes slabs. charges enables sigma pages | non_dup | [] |
29546821 | 10.1007/JHEP12(2015)072 | Solutions to the hierarchy problem usually require top partners. In standard
SUSY or composite Higgs theories, the partners carry SM color and are becoming
increasingly constrained by LHC searches. However, theories like Folded SUSY
(FS), Twin Higgs (TH) and Quirky Little Higgs (QLH) introduce uncolored top
partners, which can be SM singlets or carry electroweak charge. Their small
production cross section left doubt as to whether the LHC can effectively probe
such scenarios. Typically, these partners are charged under their own mirror
color gauge group. In FS and QLH, the absence of light mirror matter allows
glueballs to form at the bottom of the mirror spectrum. This is also the case
in some TH realizations. The Higgs can decay to these mirror glueballs, with
the glueballs decaying into SM particles with potentially observable lifetimes.
We undertake the first detailed study of this glueball signature and
quantitatively demonstrate the discovery potential of uncolored naturalness via
exotic Higgs decays at the LHC and a potential future 100 TeV collider. Our
findings indicate that mirror glueballs are the smoking gun signature of
natural FS and QLH type theories, in analogy to tree-level Higgs coupling
shifts for the TH. We show that glueball masses in the $\sim$ 10-60 GeV mass
range are theoretically preferred. Careful treatment of lifetime,
mirror-hadronization and nonperturbative uncertainties is required to perform
meaningful collider studies. We outline several new search strategies for
exotic Higgs decays of the form $h\to XX \to 4f$ at the LHC, with $X$ having
lifetimes in the $10 \mu m$ to $km$ range. We find that FS stops can be probed
with masses up to 600 (1100) GeV at the LHC with 300 (3000) /fb of data, and TH
top partners could be accessible with masses up to 900 (1500) GeV. This makes
exotic Higgs decays the prime discovery channel for uncolored naturalness at
the LHC.Comment: 31 pages + references, 10 figures. Extended sensitivity projections
to glueball masses below 12 GeV, added model-independent presentation of
limits, improved modeling of displaced vertex triggering and reconstruction.
Conclusions unchange | Discovering Uncolored Naturalness in Exotic Higgs Decays | discovering uncolored naturalness in exotic higgs decays | hierarchy partners. susy composite partners carry becoming increasingly constrained searches. folded susy twin quirky uncolored partners singlets carry electroweak charge. doubt effectively scenarios. partners mirror group. mirror glueballs mirror spectrum. realizations. mirror glueballs glueballs decaying potentially observable lifetimes. undertake glueball signature quantitatively discovery uncolored naturalness exotic decays collider. mirror glueballs smoking signature analogy shifts glueball theoretically preferred. careful lifetime mirror hadronization nonperturbative meaningful collider studies. outline exotic decays lifetimes range. stops probed partners accessible gev. exotic decays prime discovery uncolored naturalness pages figures. projections glueball presentation displaced triggering reconstruction. unchange | non_dup | [] |
42643484 | 10.1007/JHEP12(2015)073 | Thermodynamic quantities associated with black holes in Anti-de Sitter space
obey an interesting identity when the cosmological constant is included as one
of the dynamical variables, the generalized Smarr relation. We show that this
relation can easily be understood from the point of view of the dual
holographic field theory. It amounts to the simple statement that the extensive
thermodynamic quantities of a large $N$ gauge theory only depend on the number
of colors, $N$, via an overall factor of $N^2$.Comment: 13 page | Holographic Black Hole Chemistry | holographic black hole chemistry | thermodynamic quantities holes sitter obey cosmological smarr relation. understood holographic theory. amounts statement extensive thermodynamic quantities colors .comment | non_dup | [] |