core_id
stringlengths 4
9
| doi
stringlengths 10
80
| original_abstract
stringlengths 500
21.8k
| original_title
stringlengths 20
441
| processed_title
stringlengths 20
441
| processed_abstract
stringlengths 34
13.6k
| cat
stringclasses 3
values | labelled_duplicates
sequence |
|---|---|---|---|---|---|---|---|
86415670 | 10.1007/JHEP10(2017)216 | The sectorized description of the (chiral) heterotic string using pure
spinors has been misleadingly viewed as an infinite tension string. One
evidence for this fact comes from the tree level 3-point graviton amplitude,
which we show to contain the usual Einstein term plus a higher curvature
contribution. After reintroducing a dimensionful parameter $\ell$ in the
theory, we demonstrate that the heterotic model is in fact two-fold, depending
on the choice of the supersymmetric sector, and that the spectrum also contains
one massive (open string like) multiplet. By taking the $\ell\to\infty$ limit,
we finally show that the ambitwistor string is recovered, reproducing the
unexpected heterotic state in Mason and Skinner's RNS description.Comment: 30 pages, one figure. Clarifications and references added. Published
versio | Connecting the ambitwistor and the sectorized heterotic strings | connecting the ambitwistor and the sectorized heterotic strings | sectorized chiral heterotic spinors misleadingly viewed infinite tension string. comes graviton usual einstein curvature contribution. reintroducing dimensionful heterotic supersymmetric massive multiplet. infty ambitwistor recovered reproducing unexpected heterotic mason skinner pages figure. clarifications added. versio | non_dup | [] |
93943881 | 10.1007/JHEP10(2017)217 | We outline a systematic procedure to obtain horizonless microstate geometries
that have the same charges as three-charge five-dimensional black holes with a
macroscopically-large horizon area and an arbitrarily-small angular momentum.
There are two routes through which such solutions can be constructed: using
multi-center Gibbons-Hawking (GH) spaces or using superstratum technology. So
far the only solutions corresponding to microstate geometries for black holes
with no angular momentum have been obtained via superstrata, and multi-center
Gibbons-Hawking spaces have been believed to give rise only to microstate
geometries of BMPV black holes with a large angular momentum. We perform a
thorough search throughout the parameter space of smooth horizonless solutions
with four GH centers and find that these have an angular momentum that is
generally larger than 80% of the cosmic censorship bound. However, we find that
solutions with three GH centers and one supertube (which are smooth in
six-dimensional supergravity) can have an arbitrarily-low angular momentum. Our
construction thus gives a recipe to build large classes of microstate
geometries for zero-angular-momentum black holes without resorting to
superstratum technology.Comment: 36 pages, 23 figure | A systematic construction of microstate geometries with low angular
momentum | a systematic construction of microstate geometries with low angular momentum | outline horizonless microstate geometries charges holes macroscopically horizon arbitrarily momentum. routes gibbons hawking superstratum technology. microstate geometries holes superstrata gibbons hawking believed microstate geometries bmpv holes momentum. thorough horizonless centers cosmic censorship bound. centers supertube supergravity arbitrarily momentum. recipe build microstate geometries holes resorting superstratum pages | non_dup | [] |
129355143 | 10.1007/JHEP10(2018)002 | Admissible curved space backgrounds for four-dimensional supersymmetric field
theories are determined by solving Killing spinor equations of four-dimensional
off-shell supergravities. These can be obtained by combining ten-dimensional
type IIB supersymmetry with D-brane kappa-symmetry and identifying auxiliary
fields of the four-dimensional supergravity fields in terms of type IIB fields.
In this paper we show how to extend a number of solutions of four-dimensional
Killing spinor equations with four or less supercharges to solutions of the
ten-dimensional supersymmetry constraints.Comment: 31 page | Ten-dimensional lifts of global supersymmetry on curved spaces | ten-dimensional lifts of global supersymmetry on curved spaces | admissible curved backgrounds supersymmetric solving killing spinor supergravities. combining supersymmetry brane kappa identifying auxiliary supergravity fields. extend killing spinor supercharges supersymmetry | non_dup | [] |
146475649 | 10.1007/JHEP10(2018)009 | We discuss a scenario that the dark matter in late time universe emerges as
part of the holographic stress-energy tensor on the hypersurface in higher
dimensional flat spacetime. Firstly we construct a toy model with a de Sitter
hypersurface as the holographic screen in the flat bulk. After adding the
baryonic matter on the screen, we assume that both of the dark matter and dark
energy can be described by the Brown-York stress-energy tensor. From the
Hamiltonian constraint equation in the flat bulk, we find an interesting
relation between the dark matter and baryonic matter's energy density
parameters, by comparing with the Lambda cold dark matter parameterization. We
further compare this holographic embedding of emergent dark matter with
traditional braneworld scenario and present an alternative interpretation as
the holographic universe. It can be reduced to our toy constraint in the late
time universe, with the new parameterization of the Friedmann equation. We also
comment on the possible connection with Verlinde's emergent gravity, where the
dark matter is treated as the elastic response of the baryonic matter on the de
Sitter spacetime background. We show that from the holographic de Sitter model
with elasticity, the Tully-Fisher relation and the dark matter distribution in
the galaxy scale can be derived.Comment: 28 pages, 2 figures; Matches published version and we thank the
referees for many insightful comments; v3: typos in the Friedmann equations
are fixe | Emergent Dark Matter in Late Time Universe on Holographic Screen | emergent dark matter in late time universe on holographic screen | universe emerges holographic hypersurface spacetime. firstly sitter hypersurface holographic screen bulk. adding baryonic screen brown tensor. baryonic lambda cold parameterization. holographic embedding emergent traditional braneworld holographic universe. universe parameterization friedmann equation. comment connection verlinde emergent elastic baryonic sitter spacetime background. holographic sitter elasticity tully fisher pages matches referees insightful comments typos friedmann fixe | non_dup | [] |
93944623 | 10.1007/JHEP10(2018)022 | Type II string theory and M-theory admit flux configurations that break
supersymmetry below the Kaluza-Klein scale. These backgrounds play a central
role in most models of the string landscape. I argue that the behavior of such
backgrounds at weak coupling is generically a rolling solution, not a static
space-time. Quantum corrections to the space-time potential are computed around
this classical time-dependent background. This is particularly important for
non-perturbative corrections. This change in perspective offers an explanation
for why there appear to be many effective field theory models that seemingly
evade the known no-go theorems forbidding de Sitter space-times. This has
interesting implications for type IIB string landscape models.Comment: 31 pages; LaTeX; references added; minor changes and more references
adde | Supersymmetry Breaking by Fluxes | supersymmetry breaking by fluxes | admit configurations break supersymmetry kaluza klein scale. backgrounds landscape. argue backgrounds generically rolling time. background. perturbative corrections. perspective offers explanation seemingly evade theorems forbidding sitter times. landscape pages latex minor adde | non_dup | [] |
188016588 | 10.1007/JHEP10(2018)031 | A search for exotic decays of the Higgs boson into a pair of spin-zero particles, H → aa, where the a-boson decay sin to b-quarks promptly or with a mean proper lifetime cτa up to 6 mm and has a mass in the range of 20–60 GeV, is presented. The search is performed in events where the Higgs boson is produced in association with a W or Z boson, giving rise to a signature of one or two charged leptons (electrons or muons) and multiple jets from b-quark decays. The analysis is based on the dataset of proton-proton collisions at s√=13 TeV recorded in 2015 and 2016 by the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb−1. No significant excess of events above the Standard Model background prediction is observed, and 95% confidence-level upper limits are derived for the production cross-sections for pp → WH, ZH and their combination, times the branching ratio of the decay chain H → aa → 4b. For a-bosons which decay promptly, the upper limit on the combination of cross-sections for WH and ZH times the branching ratio of H → aa → 4b ranges from 3.0 pb for ma = 20 GeV to 1.3 pb for ma = 60 GeV, assuming that the ratio of WH to ZH cross-sections follows the Standard Model prediction. For a-bosons with longer proper lifetimes, the most stringent limits are 1.8 pb and 0.68 pb, respectively, at cτa ∼ 0.4 mm | Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the H → aa → 4b channel in pp collisions at s√=13 TeV with the ATLAS detector | search for the higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the h → aa → 4b channel in pp collisions at s√=13 tev with the atlas detector | exotic decays boson boson quarks promptly proper lifetime presented. boson boson giving signature leptons muons jets decays. dataset proton proton collisions atlas cern hadron collider luminosity excess confidence branching bosons promptly branching ranges prediction. bosons proper lifetimes stringent | non_dup | [] |
83851045 | 10.1007/JHEP10(2018)033 | We have constructed a class of perturbative dynamical black hole solutions in
presence of cosmological constant. We have done our calculation in large number
of dimensions. The inverse power of dimension has been used as the perturbation
parameter and our calculation is valid upto the first subleading order. The
solutions are in one to one correspondence with a dynamical membrane and a
velocity field embedded in the asymptotic geometry. Our method is manifestly
covariant with respect to the asymptotic geometry. One single calculation and
the same universal result works for both dS and AdS geometry or in case of AdS
for both global AdS and Poincare patch. We have checked our final answer with
various known exact solutions and the known spectrum of Quasi Normal modes in
AdS/dS.Comment: 74 pages. v2: Minor changes, typos correcte | The large D black hole dynamics in AdS/dS backgrounds | the large d black hole dynamics in ads/ds backgrounds | perturbative cosmological constant. dimensions. perturbation valid upto subleading order. correspondence embedded asymptotic geometry. manifestly covariant asymptotic geometry. universal poincare patch. checked answer quasi pages. minor typos correcte | non_dup | [] |
129358630 | 10.1007/JHEP10(2018)050 | Inspired by the Contino-Pomarol-Rattazzi mechanism we explore scenarios with
a very light (100 keV to 10 GeV) radion which could be associated with the
suppression of the electroweak contribution to vacuum energy. We construct
explicit, realistic models that realize this mechanism and explore the
phenomenological constraints on this class of models. Compared with axion-like
particles in this mass range, the bounds from SN 1987a and from cosmology can
be much weaker, depending on the the mass of the radion and its coupling to
other particles. With couplings suppressed by a scale lower than 100 TeV much
of the mass window from 100 keV to 10 GeV is still open.Comment: 30 pages, 12 figures, published version, software for figure uploade | The Light Radion Window | the light radion window | inspired contino pomarol rattazzi explore scenarios radion suppression electroweak energy. realistic realize explore phenomenological models. axion bounds cosmology weaker radion particles. couplings suppressed window pages uploade | non_dup | [] |
129354508 | 10.1007/JHEP10(2018)065 | We present the full basis of effective operators relevant for dark matter
direct detection, up to and including operators of mass dimension seven. We
treat the cases where dark matter is either a Dirac fermion, a Majorana
fermion, a complex scalar, or a real scalar, allowing for dark matter to
furnish a general representation of the electroweak gauge group. We describe
the algorithmic procedure used to obtain the minimal set of effective operators
and provide the tree-level matching conditions onto the effective theory valid
below the electroweak scale.Comment: 30 pages, 1 figur | Effective Field Theory for Dark Matter Direct Detection up to Dimension
Seven | effective field theory for dark matter direct detection up to dimension seven | seven. treat dirac fermion majorana fermion allowing furnish electroweak group. algorithmic matching valid electroweak pages figur | non_dup | [] |
187994485 | 10.1007/JHEP10(2018)080 | We analytically construct asymptotically AdS5 black string solutions starting from the four-dimensional domain wall black hole of [1]. It is shown that its uplift gives a black string in d = 5 minimal gauged supergravity, with momentum along the string. Applying instead the residual symmetries of N = 2, d = 4 Fayet-Iliopoulos-gauged super-gravity discovered in [2] to the domain wall seed leads, after uplifting, to a dyonic black string that interpolates between AdS5 and AdS3 × H2 at the horizon. A Kaluza-Klein reduction of the latter along an angular Killing direction ϕ followed by a duality transformation yields, after going back to five dimensions, a black string with both momentum along the string and rotation along ϕ. This is the first instance of using solution-generating techniques in gauged supergravity to add rotation to a given seed. These solutions all have constant scalar fields. As was shown in [3], the construction of supersymmetric static magnetic black strings in the FI-gauged stu model amounts to solving the SO(2, 1) spinning top equations, which descend from an inhomogeneous version of the Nahm equations. We are able to solve these in a particular case, which leads to a generalization of the Maldacena-Nuñez solution | AdS5 black strings in the stu model of FI-gauged N = 2 supergravity | ads5 black strings in the stu model of fi-gauged n = 2 supergravity | analytically asymptotically uplift gauged supergravity string. residual symmetries fayet iliopoulos gauged super discovered seed uplifting dyonic interpolates horizon. kaluza klein killing duality going generating gauged supergravity seed. fields. supersymmetric strings gauged amounts solving spinning descend inhomogeneous nahm equations. solve generalization maldacena nuñez | non_dup | [] |
188182095 | 10.1007/JHEP10(2018)103 | Loop amplitudes for massless five particle scattering processes contain Feynman integrals depending on the external momentum invariants: pentagon functions. We perform a detailed study of the analyticity properties and cut structure of these functions up to two loops in the planar case, where we classify and identify the minimal set of basis functions. They are computed from the canonical form of their differential equations and expressed in terms of generalized polylogarithms, or alternatively as one-dimensional integrals. We present analytical expressions and numerical evaluation routines for these pentagon functions, in all kinematical configurations relevant to five-particle scattering processes | Pentagon functions for massless planar scattering amplitudes. | pentagon functions for massless planar scattering amplitudes. | amplitudes massless feynman integrals invariants pentagon functions. analyticity loops planar classify functions. canonical polylogarithms alternatively integrals. expressions routines pentagon kinematical configurations | non_dup | [] |
141536412 | 10.1007/JHEP10(2018)110 | The formal derivatives of the Yang-Baxter equation with respect to its
spectral parameters, evaluated at some fixed point of these parameters, provide
us with two systems of differential equations. The derivatives of the $R$
matrix elements, however, can be regarded as independent variables and
eliminated from the systems, after which two systems of polynomial equations
are obtained in place. In general, these polynomial systems have a non-zero
Hilbert dimension, which means that not all elements of the $R$ matrix can be
fixed through them. Nonetheless, the remaining unknowns can be found by solving
a few number of simple differential equations that arise as consistency
conditions of the method. The branches of the solutions can also be easily
analyzed by this method, which ensures the uniqueness and generality of the
solutions. In this work we considered the Yang-Baxter equation for two-state
systems, up to the eight-vertex model. This differential approach allowed us to
solve the Yang-Baxter equation in a systematic way and also to completely
classify its regular solutions.Comment: Final version. 40 pages, 3 tables. Keywords: Yang-Baxter Equation,
Lattice Integrable Models, Eight-Vertex Model, Bethe Ansatz, Differential and
Algebraic Geometr | Solving and classifying the solutions of the Yang-Baxter equation
through a differential approach. Two-state systems | solving and classifying the solutions of the yang-baxter equation through a differential approach. two-state systems | formal derivatives baxter equations. derivatives regarded eliminated place. hilbert them. nonetheless unknowns solving arise consistency method. branches ensures uniqueness generality solutions. baxter eight model. solve baxter classify version. pages tables. keywords baxter integrable eight bethe ansatz algebraic geometr | non_dup | [] |
83867447 | 10.1007/JHEP10(2018)116 | We investigate an excess observed in hadronic events in the archived LEP2
ALEPH data. This excess was observed at preselection level during data-MC
comparisons of four-jet events when no search was being performed. The events
are clustered into four jets and paired such that the mass difference between
the two dijet systems is minimized. The excess occurs in the region
$M_1+M_2\sim 110\mbox{ GeV}$; about half of the excess is concentrated in the
region $M_1\sim 80\mbox{ GeV}$, $M_2\sim 25\mbox{ GeV}$, with a local
significance between $4.7\sigma$ and $5.5\sigma$, depending on assumptions
about hadronization uncertainties. The other half of the events are in a broad
excess near $M_1\sim M_2\sim 55\mbox{ GeV}$; these display a local significance
of $4.1-4.5\sigma$. We investigate the effects of changing the SM QCD Monte
Carlo sample, the jet-clustering algorithm, and the jet rescaling method. We
find that the excess is remarkably robust under these changes, and we find no
source of systematic uncertainty that can explain the excess. No analogue of
the excess is seen at LEP1.Comment: 40 pages, 17 figures. Version published in JHEP. Detector section
removed, S/B and SM expectation figure added, expanded discussion of
hadronization uncertainties, small changes in systematic errors due to LEP1
data statistics, table added with significance as a function of
center-of-mass energy, changes in tex | Localized $4\sigma$ and $5\sigma$ Dijet Mass Excesses in ALEPH LEP2
Four-Jet Events | localized $4\sigma$ and $5\sigma$ dijet mass excesses in aleph lep2 four-jet events | excess hadronic archived aleph data. excess preselection comparisons performed. clustered jets paired dijet minimized. excess mbox excess concentrated mbox mbox sigma sigma assumptions hadronization uncertainties. broad excess mbox display sigma changing monte carlo clustering rescaling method. excess remarkably robust excess. analogue excess pages figures. jhep. removed expectation expanded hadronization | non_dup | [] |
141533520 | 10.1007/JHEP10(2018)136 | Freeze-in dark matter (DM) mediated by a light ($\ll$ keV) weakly-coupled
dark-photon is an important benchmark for the emerging low-mass direct
detection program. Since this is one of the only predictive, detectable
freeze-in models, we investigate how robustly such testability extends to other
scenarios. For concreteness, we perform a detailed study of models in which DM
couples to a light scalar mediator and acquires a freeze-in abundance through
Higgs-mediator mixing. Unlike dark-photons, whose thermal properties weaken
stellar cooling bounds, the scalar coupling to Standard Model (SM) particles is
subject to strong astrophysical constraints, which severely limit the fraction
of DM that can be produced via freeze-in. While it seems naively possible to
compensate for this reduction by increasing the mediator-DM coupling,
sufficiently large values eventually thermalize the dark sector with itself and
yield efficient DM annihilation to mediators, which depletes the freeze-in
population; only a small window of DM candidate masses near the $\sim$ GeV
scale can accommodate the total observed abundance. Since many qualitatively
similar issues arise for other light mediators, we find it generically
difficult to realize a viable freeze-in scenario in which production arises
only from renormalizable interactions with SM particles. We also comment on
several model variations that may evade these conclusions.Comment: 19 pages, 5 figures, 2 appendice | Freezing In, Heating Up, and Freezing Out: Predictive Nonthermal Dark
Matter and Low-Mass Direct Detection | freezing in, heating up, and freezing out: predictive nonthermal dark matter and low-mass direct detection | freeze weakly benchmark emerging program. predictive detectable freeze robustly testability extends scenarios. concreteness couples mediator acquires freeze abundance mediator mixing. unlike photons weaken cooling bounds astrophysical severely freeze naively compensate mediator sufficiently eventually thermalize annihilation mediators depletes freeze window candidate accommodate abundance. qualitatively arise mediators generically realize viable freeze arises renormalizable particles. comment evade pages appendice | non_dup | [] |
162911924 | 10.1007/JHEP10(2018)142 | The amplituhedron provides a beautiful description of perturbative superamplitude\ud
integrands in N = 4 SYM in terms of purely geometric objects, generalisations of\ud
polytopes. On the other hand the Wilson loop in supertwistor space also gives an explicit\ud
description of these superamplitudes as a sum of planar Feynman diagrams. Each Feynman\ud
diagram can be naturally associated with a geometrical object in the same space as the\ud
amplituhedron (although not uniquely). This suggests that these geometric images of the\ud
Feynman diagrams give a tessellation of the amplituhedron. This turns out to be the case\ud
for NMHV amplitudes. We argue however that beyond NMHV this is not true. Specifically,\ud
each Feynman diagram leads to an image with a physical boundary and spurious\ud
boundaries. The spurious ones should be “internal”, matching with neighbouring diagrams.\ud
We however show that there is no choice of geometric image of the Wilson loop Feynman\ud
diagrams which yields a geometric object without leaving unmatched spurious boundaries | The twistor Wilson loop and the amplituhedron. | the twistor wilson loop and the amplituhedron. | amplituhedron beautiful perturbative superamplitude integrands purely geometric generalisations polytopes. wilson supertwistor superamplitudes planar feynman diagrams. feynman naturally geometrical amplituhedron uniquely geometric feynman diagrams tessellation amplituhedron. turns nmhv amplitudes. argue nmhv true. feynman spurious boundaries. spurious “internal” matching neighbouring diagrams. geometric wilson feynman diagrams geometric leaving unmatched spurious boundaries | non_dup | [] |
162911928 | 10.1007/JHEP10(2018)155 | Jet production at hadron colliders is a benchmark process to probe the dynamics of the strong interaction and the structure of the colliding hadrons. One of the most basic jet production observables is the single jet inclusive cross section, which is obtained by summing all jets that are observed in an event. Our recent computation of next-to-next-to-leading order (NNLO) QCD contributions to single jet inclusive observables uncovered large corrections in certain kinematical regions, which also resulted in a sizeable ambiguity on the appropriate choice of renormalization and factorization scales. We now perform a detailed investigation of the infrared sensitivity of the different ingredients to the single jet inclusive cross section. We show that the contribution from the second jet, ordered in transverse momentum pT, in the event is particularly sensitive to higher order effects due to implicit restrictions on its kinematics. By investigating the second-jet transverse momentum distribution, we identify large-scale cancellations between different kinematical event configurations, which are aggravated by certain types of scale choice. Taking perturbative convergence and stability as selection criteria enables us to single out the total partonic transverse energy ĤT and twice the individual jet transverse momentum 2 pT (with which ĤT coincides in Born kinematics) as the most appropriate scales in the perturbative description of single jet inclusive production | Infrared sensitivity of single jet inclusive production at hadron colliders. | infrared sensitivity of single jet inclusive production at hadron colliders. | hadron colliders benchmark colliding hadrons. observables inclusive summing jets event. nnlo inclusive observables uncovered kinematical resulted sizeable ambiguity renormalization factorization scales. infrared ingredients inclusive section. ordered implicit restrictions kinematics. investigating cancellations kinematical configurations aggravated choice. perturbative enables partonic twice coincides born kinematics perturbative inclusive | non_dup | [] |
162911929 | 10.1007/JHEP10(2018)158 | We present a complete description of top quark pair production in association with a hard photon in the dilepton channel. Our calculation is accurate to NLO in QCD. It is based on matrix elements for e+νeμ−ν¯¯¯μbb¯¯γ production and includes all resonant and non-resonant diagrams, interferences, and off-shell effects of the top quarks and the W gauge bosons. This calculation constitutes the first full computation for top quark pair production with a final state photon in hadronic collisions at NLO in QCD. Numerical results for total and differential cross sections are presented for the LHC at a centre-of-mass energy of s√=13 TeV. For a few observables relevant for new physics searches, beyond some kinematic bounds, we observe shape distortions of more than 100%. In addition, we confirm that the size of the top quark off-shell effects for the total cross section is consistent with the expected uncertainties of the narrow width approximation. Results presented here are not only relevant for beyond the Standard Model physics searches but also important for precise measurements of the top-quark fiducial cross sections and top-quark properties at the LHC | Hard photons in hadroproduction of top quarks with realistic final states. | hard photons in hadroproduction of top quarks with realistic final states. | dilepton channel. qcd. νeμ−ν¯¯¯μbb¯¯γ resonant resonant diagrams interferences quarks bosons. constitutes hadronic collisions qcd. tev. observables searches kinematic bounds distortions confirm narrow approximation. searches precise fiducial | non_dup | [] |
188016592 | 10.1007/JHEP10(2018)159 | Measurements of differential cross sections of top quark pair production in association with jets by the ATLAS experiment at the LHC are presented. The measurements are performed as functions of the top quark transverse momentum, the transverse momentum of the top quark-antitop quark system and the out-of-plane transverse momentum using data from pp collisions at s√=13 TeV collected by the ATLAS detector at the LHC in 2015 and corresponding to an integrated luminosity of 3.2 fb−1. The top quark pair events are selected in the lepton (electron or muon) + jets channel. The measured cross sections, which are compared to several predictions, allow a detailed study of top quark production | Measurements of differential cross sections of top quark pair production in association with jets in pp collisions at s√=13 TeV using the ATLAS detector | measurements of differential cross sections of top quark pair production in association with jets in pp collisions at s√=13 tev using the atlas detector | jets atlas presented. antitop collisions atlas luminosity lepton muon jets channel. | non_dup | [] |
129361027 | 10.1007/JHEP10(2018)172 | It has recently been shown that a center-twisted compactification of the
four-dimensional pure $SU(N)$ Yang-Mills theory on a three-torus gives rise to
the two-dimensional $\mathbb{CP}^{N-1}$-model on a circle with a flavor-twisted
boundary condition. We verify the consistency of this statement
non-perturbatively at theta angle $\theta=\pi$, in terms of the mixed 't Hooft
anomalies for flavor symmetries and the time-reversal symmetry. This provides
further support for the approach to the confinement of four-dimensional
Yang-Mills theory from the two-dimensional $\mathbb{CP}^{N-1}$-model.Comment: 6 page | Relating 't Hooft Anomalies of 4d Pure Yang-Mills and 2d
$\mathbb{CP}^{N-1}$ Model | relating 't hooft anomalies of 4d pure yang-mills and 2d $\mathbb{cp}^{n-1}$ model | twisted compactification mills torus mathbb circle flavor twisted condition. verify consistency statement perturbatively theta theta hooft anomalies flavor symmetries reversal symmetry. confinement mills mathbb | non_dup | [] |
161936980 | 10.1007/JHEP10(2018)177 | We investigate low-energy string excitations in AdS3 × S\ud
3 × T\ud
4\ud
. When the worldsheet is decompactified,\ud
the theory has gapless modes whose spectrum at low energies is determined by massless\ud
relativistic integrable S matrices of the type introduced by Al. B. Zamolodchikov. The S matrices\ud
are non-trivial only for excitations with identical worldsheet chirality, indicating that the low-energy\ud
theory is a CFT2. We construct a Thermodynamic Bethe Ansatz (TBA) for these excitations and\ud
show how the massless modes’ wrapping effects may be incorporated into the AdS3 spectral problem.\ud
Using the TBA and its associated Y-system, we determine the central charge of the low-energy CFT2\ud
to be c = 6 from calculating the vacuum energy for antiperiodic fermions - with the vacuum energy\ud
being zero for periodic fermions in agreement with a supersymmetric theory - and find the energies\ud
of some excited states | The low-energy limit of AdS3/CFT2 and its TBA | the low-energy limit of ads3/cft2 and its tba | excitations worldsheet decompactified gapless massless relativistic integrable zamolodchikov. trivial excitations worldsheet chirality thermodynamic bethe ansatz excitations massless modes’ wrapping incorporated problem. calculating antiperiodic fermions fermions supersymmetric excited | non_dup | [] |
188016594 | 10.1007/JHEP10(2018)180 | A search for dark matter (DM) particles produced in association with a hadronically decaying vector boson is performed using pp collision data at a centre-of-mass energy of s√=13 TeV corresponding to an integrated luminosity of 36.1 fb−1, recorded by the ATLAS detector at the Large Hadron Collider. This analysis improves on previous searches for processes with hadronic decays of W and Z bosons in association with large missing transverse momentum (mono-W/Z searches) due to the larger dataset and further optimization of the event selection and signal region definitions. In addition to the mono-W/Z search, the as yet unexplored hypothesis of a new vector boson Z′ produced in association with dark matter is considered (mono-Z′ search). No significant excess over the Standard Model prediction is observed. The results of the mono-W/Z search are interpreted in terms of limits on invisible Higgs boson decays into dark matter particles, constraints on the parameter space of the simplified vector-mediator model and generic upper limits on the visible cross sections for W/Z+DM production. The results of the mono-Z′ search are shown in the framework of several simplified-model scenarios involving DM production in association with the Z′ boson | Search for dark matter in events with a hadronically decaying vector boson and missing transverse momentum in pp collisions at s√=13 TeV with the ATLAS detector | search for dark matter in events with a hadronically decaying vector boson and missing transverse momentum in pp collisions at s√=13 tev with the atlas detector | hadronically decaying boson collision luminosity atlas hadron collider. improves searches hadronic decays bosons missing mono searches dataset definitions. mono unexplored boson mono excess observed. mono interpreted invisible boson decays simplified mediator generic visible production. mono simplified scenarios involving boson | non_dup | [] |
141532366 | 10.1007/JHEP10(2018)196 | G\"{o}ttsche-Nakajima-Yoshioka K-theoretic blowup equations characterize the
Nekrasov partition function of five dimensional $\mathcal{N}=1$ supersymmetric
gauge theories compactified on a circle, which via geometric engineering
correspond to the refined topological string theory on $SU(N)$ geometries. In
this paper, we study the K-theoretic blowup equations for general local
Calabi-Yau threefolds. We find that both vanishing and unity blowup equations
exist for the partition function of refined topological string, and the crucial
ingredients are the $\bf r$ fields introduced in our previous paper. These
blowup equations are in fact the functional equations for the partition
function and each of them results in infinite identities among the refined free
energies. Evidences show that they can be used to determine the full refined
BPS invariants of local Calabi-Yau threefolds. This serves an independent and
sometimes more powerful way to compute the partition function other than the
refined topological vertex in the A-model and the refined holomorphic anomaly
equations in the B-model. We study the modular properties of the blowup
equations and provide a procedure to determine all the vanishing and unity $\bf
r$ fields from the polynomial part of refined topological string at large
radius point. We also find that certain form of blowup equations exist at
generic loci of the moduli space.Comment: 85 pages. v2: Journal versio | Blowup Equations for Refined Topological Strings | blowup equations for refined topological strings | ttsche nakajima yoshioka theoretic blowup characterize nekrasov partition mathcal supersymmetric compactified circle geometric refined topological geometries. theoretic blowup calabi threefolds. vanishing unity blowup partition refined topological crucial ingredients paper. blowup partition infinite identities refined energies. evidences refined invariants calabi threefolds. serves sometimes powerful partition refined topological refined holomorphic anomaly model. modular blowup vanishing unity refined topological point. blowup generic loci moduli pages. versio | non_dup | [] |
2138946 | 10.1007/JHEP11(2010)001 | Within warped extra dimension models that explain flavor through geometry,
flavor changing neutral current constraints generally force the Kaluza-Klein
scale to be above many TeV. This creates tension with a natural electroweak
scale. On the other hand, a much lower scale compatible with precision
electroweak and flavor changing neutral current constraints is allowed if we
decouple the Kaluza-Klein states of Standard Model gauge bosons from light
fermions $c_{\rm light}\simeq c_b\simeq 0.5$ bulk mass parameters). The main
signature for this approach is four top quark production via the Kaluza-Klein
excitations' strong coupling to top quarks. We study single lepton, like-sign
dilepton, and trilepton observables of four-top events at the Large Hadron
Collider. The like-sign dilepton signature typically has the largest discovery
potential for a strongly coupled right-handed top case ($M_{KK} \sim 2-2.5
\TeV$), while single lepton is the better when the left-handed top couples most
strongly ($M_{KK} \sim 2 \TeV$). We also describe challenging lepton-jet
collimation issues in the like-sign dilepton and trilepton channels. An
alternative single lepton observable is considered which takes advantage of the
many bottom quarks in the final state. Although searches of other particles may
compete, we find that four top production via Kaluza-Klein gluons is most
promising in a large region of this parameter space.Comment: 35 pages, 8 figures. discussions improved, references adde | Low-scale warped extra dimension and its predilection for multiple top
quarks | low-scale warped extra dimension and its predilection for multiple top quarks | warped extra flavor flavor changing neutral kaluza klein tev. creates tension electroweak scale. compatible precision electroweak flavor changing neutral decouple kaluza klein bosons fermions simeq simeq signature kaluza klein excitations quarks. lepton dilepton trilepton observables hadron collider. dilepton signature discovery handed lepton handed couples challenging lepton collimation dilepton trilepton channels. lepton observable advantage quarks state. searches compete kaluza klein gluons promising pages figures. discussions adde | non_dup | [] |
2127031 | 10.1007/JHEP11(2010)002 | The hidden conformal symmetry of extreme and non-extreme
Einstein-Maxwell-Dilaton-Axion (EMDA) black holes is addressed in this paper.
For the non-extreme one, employing the wave equation of massless scalars, the
conformal symmetry with left temperature $T_{L}=\frac{M}{2\pi a}$ and right
temperature $T_{R}=\frac{\sqrt{M^{2}-a^{2}}}{2\pi a}$ in the near region is
found. The conformal symmetry is spontaneously broken due to the periodicity of
the azimuthal angle. The microscopic entropy is derived by the Cardy formula
and is fully in consistence with the Bekenstein-Hawking area-entropy law. The
absorption cross section in the near region is calculated and exactly equals
that in a 2D CFT. For the extreme case, by redefining the conformal
coordinates, the duality between the solution space and CFT is studied. The
microscopic entropy is found to exactly agree with the area-entropy law.Comment: V3, typos corrected, version to appear in JHE | Hidden conformal symmetry of extreme and non-extreme
Einstein-Maxwell-Dilaton-Axion black holes | hidden conformal symmetry of extreme and non-extreme einstein-maxwell-dilaton-axion black holes | hidden conformal extreme extreme einstein maxwell dilaton axion emda holes addressed paper. extreme employing massless scalars conformal frac frac sqrt found. conformal spontaneously broken periodicity azimuthal angle. microscopic cardy consistence bekenstein hawking law. equals cft. extreme redefining conformal duality studied. microscopic agree typos corrected | non_dup | [] |
2140383 | 10.1007/JHEP11(2010)004 | We investigate the possibility of probing high reheating temperature
scenarios at the LHC, in supersymmetric models where the gravitino is the
lightest supersymmetric particle, and the stau is the next-to-lightest
supersymmetric particle. In such scenarios, the big-bang nucleosynthesis and
the gravitino abundance give a severe upper bound on the gluino mass. We find
that, if the reheating temperature is \sim 10^8 GeV or higher, the scenarios
can be tested at the LHC with an integrated luminosity of O(1 fb^{-1}) at
\sqrt{s}=7 TeV in most of the parameter space.Comment: 17 pages, 5 figures, minor modification | Probing High Reheating Temperature Scenarios at the LHC with Long-Lived
Staus | probing high reheating temperature scenarios at the lhc with long-lived staus | probing reheating scenarios supersymmetric gravitino lightest supersymmetric stau lightest supersymmetric particle. scenarios bang nucleosynthesis gravitino abundance gluino mass. reheating scenarios luminosity sqrt pages minor modification | non_dup | [] |
2146255 | 10.1007/JHEP11(2010)005 | The production of doubly charged Higgs bosons (H^{\pm\pm}) at the CERN LHC
can give rise to distinctive multi-lepton signatures. The discovery potential
of H^{\pm\pm} can be optimized by considering a search strategy which is
sensitive to both of the dominant production mechanisms, q\bar q\to
H^{++}H^{--} and q\bar {q'}\to H^{\pm\pm}H^{\mp}. We compare the discovery
potential for the signatures of exactly four leptons and at least three leptons
in the final state, using the same set of cuts. We have carried out fast
detector simulations at the LHC for both signal and backgrounds for a wide
range of values of the charged Higgs mass. We find that the use of the latter
channel can substantially improve the detection prospects of the doubly charged
Higgs boson at the LHC.Comment: 18 pages, 6 figures, discussion of QCD backgrounds added, version to
appear in JHE | Leptonic signatures of doubly charged Higgs boson production at the LHC | leptonic signatures of doubly charged higgs boson production at the lhc | doubly bosons cern distinctive lepton signatures. discovery optimized discovery signatures leptons leptons cuts. backgrounds mass. substantially prospects doubly boson pages backgrounds | non_dup | [] |
2134836 | 10.1007/JHEP11(2010)006 | We point out that the type III seesaw mechanism introducing fermion triplets
predicts peculiar Higgs boson signatures of displaced vertices with two b jets
and one or two charged particles which can be cleanly identified. In a
supersymmetric theory, the scalar partner of the fermion triplet contains a
neutral dark matter candidate which is almost degenerate with its charged
components. A Higgs boson can be produced together with such a dark matter
triplet in the cascade decay chain of a strongly produced squark or gluino.
When the next lightest supersymmetric particle (NLSP) is bino/wino-like, there
appears a Higgs boson associated with two charged tracks of a charged lepton
and a heavy charged scalar at a displacement larger than about 1 mm. The
corresponding production cross-section is about 0.5 fb for the squark/gluino
mass of 1 TeV. In the case of the stau NLSP, it decays mainly to a Higgs boson
and a heavy charged scalar whose decay length is larger than 0.1 mm for the
stau NLSP mixing with the left-handed stau smaller than 0.3. As this process
can have a large cascade production $\sim 2$ pb for the squark/gluino mass
$\sim 1$ TeV, one may be able to probe it at the early stage of the LHC
experiment.Comment: 10 pages, 5 figure | Displaced Higgs production in type III seesaw | displaced higgs production in type iii seesaw | seesaw introducing fermion triplets predicts peculiar boson signatures displaced jets cleanly identified. supersymmetric partner fermion triplet neutral candidate degenerate components. boson triplet cascade squark gluino. lightest supersymmetric nlsp bino wino boson tracks lepton displacement squark gluino tev. stau nlsp decays boson stau nlsp handed stau cascade squark gluino pages | non_dup | [] |
2142820 | 10.1007/JHEP11(2010)007 | We discuss the emergence of W-algebras as asymptotic symmetries of
higher-spin gauge theories coupled to three-dimensional Einstein gravity with a
negative cosmological constant. We focus on models involving a finite number of
bosonic higher-spin fields, and especially on the example provided by the
coupling of a spin-3 field to gravity. It is described by a SL(3) \times SL(3)
Chern-Simons theory and its asymptotic symmetry algebra is given by two copies
of the classical W_3-algebra with central charge the one computed by Brown and
Henneaux in pure gravity with negative cosmological constant.Comment: 38 pages; version to be published in JHEP; typos corrected in eqs.
(2.9) and (2.54 | Asymptotic symmetries of three-dimensional gravity coupled to
higher-spin fields | asymptotic symmetries of three-dimensional gravity coupled to higher-spin fields | emergence algebras asymptotic symmetries einstein cosmological constant. involving bosonic gravity. chern simons asymptotic copies brown henneaux cosmological pages jhep typos corrected eqs. | non_dup | [] |
2111324 | 10.1007/JHEP11(2010)008 | We explore a variant on the MT2 kinematic variable which enables dark matter
mass measurements for simple, one stage, cascade decays. This will prove useful
for constraining a subset of supersymmetric processes, or a class of
leptophilic dark matter models at the LHC. We investigate the statistical reach
of these measurements and discuss which sources of error have the largest
effects. For example, we find that using only single stage cascade decays with
initial state radiation, a measurement of a 150 GeV dark matter candidate can
be made to O(10%) for a parent mass of 300 GeV with a production cross section
of 100 fb and 100 fb^(-1) of integrated luminosity.Comment: 23 Pages, 14 Figures, 2 Appendice | Extracting the Dark Matter Mass from Single Stage Cascade Decays at the
LHC | extracting the dark matter mass from single stage cascade decays at the lhc | explore variant kinematic enables cascade decays. constraining supersymmetric leptophilic lhc. effects. cascade decays candidate parent pages appendice | non_dup | [] |
2131573 | 10.1007/JHEP11(2010)010 | We find attractor equations describing moduli stabilization for heterotic
compactifications with generic SU(3)-structure. Complex structure and K\"ahler
moduli are treated on equal footing by using SU(3)xSU(3)-structure at
intermediate steps. All independent vacuum data, including VEVs of the
stabilized moduli, is encoded in a pair of generating functions that depend on
fluxes alone. We work out an explicit example that illustrates our methods.Comment: 37 pages, references and clarifications adde | Heterotic Flux Attractors | heterotic flux attractors | attractor describing moduli stabilization heterotic compactifications generic structure. ahler moduli footing steps. vevs stabilized moduli encoded generating fluxes alone. illustrates pages clarifications adde | non_dup | [] |
2136269 | 10.1007/JHEP11(2010)011 | The gravitational dual of an insulator/superconductor transition driven by
increasing the chemical potential has recently been constructed. However, the
system was studied in a probe limit and only a part of the phase diagram was
obtained. We include the backreaction and construct the complete phase diagram
for this system. For fixed chemical potential there are typically two phase
transitions as the temperature is lowered. Surprisingly, for a certain range of
parameters, the system first becomes a superconductor and then becomes an
insulator as the temperature approaches zero. As a byproduct of our analysis,
we also construct the gravitational dual of a Bose-Einstein condensate of
glueballs in a confining gauge theory.Comment: 19 pages; v2: references adde | Complete Phase Diagrams for a Holographic Superconductor/Insulator
System | complete phase diagrams for a holographic superconductor/insulator system | gravitational insulator superconductor constructed. obtained. backreaction system. lowered. surprisingly superconductor insulator zero. byproduct gravitational bose einstein condensate glueballs confining pages adde | non_dup | [] |
2127743 | 10.1007/JHEP11(2010)012 | We consider the production of a light non-standard model Higgs boson of order
$100~\GEV$ with an associated $W$ boson at CERN Large Hadron Collider. We focus
on an interesting scenario that, the Higgs boson decays predominately into two
light scalars $\chi$ with mass of few GeV which sequently decay into four
gluons, i.e. $h\to 2\chi \to 4g$. Since $\chi$ is much lighter than the Higgs
boson, it will be highly boosted and its decay products, the two gluons, will
move close to each other, resulting in a single jet for $\chi$ decay in the
detector. By using electromagnetic calorimeter-based and jet substructure
analyses, we show in two cases of different $\chi$ masses that it is quite
promising to extract the signal of Higgs boson out of large QCD background.Comment: 20 pages, 7 figure | Search for the Elusive Higgs Boson Using Jet Structure at LHC | search for the elusive higgs boson using jet structure at lhc | boson boson cern hadron collider. boson decays predominately scalars sequently gluons i.e. lighter boson boosted gluons move detector. electromagnetic calorimeter substructure promising extract boson pages | non_dup | [] |
2137147 | 10.1007/JHEP11(2010)014 | The gauge/string dualities have drawn attention to a class of variational
problems on a boundary at infinity, which are not well defined unless a certain
boundary term is added to the classical action. In the context of supergravity
in asymptotically AdS spaces these problems are systematically addressed by the
method of holographic renormalization. We argue that this class of a priori ill
defined variational problems extends far beyond the realm of holographic
dualities. As we show, exactly the same issues arise in gravity in non
asymptotically AdS spaces, in point particles with certain unbounded from below
potentials, and even fundamental strings in flat or AdS backgrounds. We show
that the variational problem in all such cases can be made well defined by the
following procedure, which is intrinsic to the system in question and does not
rely on the existence of a holographically dual theory: (i) The first step is
the construction of the space of the most general asymptotic solutions of the
classical equations of motion that inherits a well defined symplectic form from
that on phase space. The requirement of a well defined symplectic form is
essential and often leads to a necessary repackaging of the degrees of freedom.
(ii) Once the space of asymptotic solutions has been constructed in terms of
the correct degrees of freedom, then there exists a boundary term that is
obtained as a certain solution of the Hamilton-Jacobi equation which
simultaneously makes the variational problem well defined and preserves the
symplectic form. This procedure is identical to holographic renormalization in
the case of asymptotically AdS gravity, but it is applicable to any Hamiltonian
system.Comment: 37 pages; v2 minor corrections in section 2, 2 references and a
footnote on Palatini gravity added. Version to appear in JHE | Holographic renormalization as a canonical transformation | holographic renormalization as a canonical transformation | dualities drawn variational infinity unless action. supergravity asymptotically systematically addressed holographic renormalization. argue priori variational extends realm holographic dualities. arise asymptotically unbounded potentials strings backgrounds. variational intrinsic rely holographically asymptotic inherits symplectic space. requirement symplectic repackaging freedom. asymptotic freedom hamilton jacobi simultaneously variational preserves symplectic form. holographic renormalization asymptotically applicable pages minor footnote palatini added. | non_dup | [] |
2145159 | 10.1007/JHEP11(2010)015 | In this work we present a simple thick braneworld model that is generated by
an intriguing interplay between a 5D cosmological constant with a de Sitter
metric induced in the 3-brane without the inclusion of scalar fields. We show
that 4D gravity is localized on this brane, provide analytic expressions for
the massive Kaluza-Klein (KK) fluctuation modes and also show that the spectrum
of metric excitations displays a mass gap. We finally present the corrections
to Newton's law due to these massive modes. This model has no naked
singularities along the fifth dimension despite the existence of a mass gap in
the graviton spectrum as it happens in thick branes with 4D Poincare symmetry,
providing a simple model with very good features: the curvature is completely
smooth along the fifth dimension, it localizes 4D gravity and the spectrum of
gravity fluctuations presents a mass gap, a fact that rules out the existence
of phenomenologically dangerous ultralight KK excitations in the model. We
finally present our solution as a limit of scalar thick branes.Comment: 11 pages in latex, no figures, title and abstract changed, a new
section and some references adde | Localization of gravity on a de Sitter thick braneworld without scalar
fields | localization of gravity on a de sitter thick braneworld without scalar fields | thick braneworld intriguing interplay cosmological sitter brane inclusion fields. localized brane analytic expressions massive kaluza klein fluctuation excitations displays gap. newton massive modes. naked singularities fifth graviton happens thick branes poincare curvature fifth localizes presents phenomenologically dangerous ultralight excitations model. thick pages latex title changed adde | non_dup | [] |
2114138 | 10.1007/JHEP11(2010)016 | We present a simple systematic method to study candidate counterterms in N=8
supergravity. Complicated details of the counterterm operators are avoided
because we work with the on-shell matrix elements they produce. All n-point
matrix elements of an independent SUSY invariant operator of the form D^{2k}
R^n +... must be local and satisfy SUSY Ward identities. These are strong
constraints, and we test directly whether or not matrix elements with these
properties can be constructed. If not, then the operator does not have a
supersymmetrization, and it is excluded as a potential counterterm. For n>4, we
find that R^n, D^2 R^n, D^4 R^n, and D^6 R^n are excluded as counterterms of
MHV amplitudes, while only R^n and D^2 R^n are excluded at the NMHV level. As a
consequence, for loop order L<7, there are no independent D^{2k}R^n
counterterms with n>4. If an operator is not ruled out, our method constructs
an explicit superamplitude for its matrix elements. This is done for the 7-loop
D^4 R^6 operator at the NMHV level and in other cases. We also initiate the
study of counterterms without leading pure-graviton matrix elements, which can
occur beyond the MHV level. The landscape of excluded/allowed candidate
counterterms is summarized in a colorful chart.Comment: 25 pages, 1 figure, published versio | A simple approach to counterterms in N=8 supergravity | a simple approach to counterterms in n=8 supergravity | candidate counterterms supergravity. complicated counterterm avoided produce. susy satisfy susy ward identities. constructed. supersymmetrization excluded counterterm. excluded counterterms amplitudes excluded nmhv level. counterterms ruled constructs superamplitude elements. nmhv cases. initiate counterterms graviton level. landscape excluded candidate counterterms summarized colorful pages versio | non_dup | [] |
2109329 | 10.1007/JHEP11(2010)018 | We derive the infinite dimensional Supersymmetric Galilean Conformal Algebra
(SGCA) in the case of two spacetime dimensions by performing group contraction
on 2d superconformal algebra. We also obtain the representations of the
generators in terms of superspace coordinates. Here we find realisations of the
SGCA by considering scaling limits of certain 2d SCFTs which are non-unitary
and have their left and right central charges become large in magnitude and
opposite in sign. We focus on the Neveu-Schwarz sector of the parent SCFTs and
develop, in parallel to the GCA studies recently in (arXiv:0912.1090), the
representation theory based on SGCA primaries, Ward identities for their
correlation functions and their descendants which are null states.Comment: La TeX file, 32 pages; v2: typos corrected, journal versio | Supersymmetric Extension of GCA in 2d | supersymmetric extension of gca in 2d | derive infinite supersymmetric galilean conformal sgca spacetime performing contraction superconformal algebra. representations generators superspace coordinates. realisations sgca scfts unitary charges opposite sign. neveu schwarz parent scfts sgca primaries ward identities descendants file pages typos corrected versio | non_dup | [] |
2120393 | 10.1007/JHEP11(2010)019 | In the pure spinor formalism for the superstring, the b antighost is
necessary for multiloop amplitude computations and is a composite operator
constructed to satisfy {Q,b}=T where Q is the BRST operator and T is the
holomorphic stress-tensor. In superstring backgrounds with only NS-NS fields
turned on, or in flat space, one needs to introduce "non-minimal" variables in
order to construct the b antighost. However, in Type II backgrounds where the
Ramond-Ramond bispinor field-strength satisfies certain conditions, the b
antighost can be constructed without the non-minimal variables. Although the b
antighost in these backgrounds is not holomorphic, its antiholomorphic
derivative is BRST-trivial. We discuss the properties of this operator both in
the AdS_5 x S^5 background and in a generic curved background.Comment: 23 pages, harvmac; refs added; corrected the necessary conditions on
Ramond-Ramond field to construct b antighos | Taming the b antighost with Ramond-Ramond flux | taming the b antighost with ramond-ramond flux | spinor formalism superstring antighost multiloop computations composite satisfy brst holomorphic tensor. superstring backgrounds turned antighost. backgrounds ramond ramond bispinor satisfies antighost variables. antighost backgrounds holomorphic antiholomorphic brst trivial. generic curved pages harvmac refs corrected ramond ramond antighos | non_dup | [] |
2138355 | 10.1007/JHEP11(2010)020 | We define a theory of Galilean gravity in 2+1 dimensions with cosmological
constant as a Chern-Simons gauge theory of the doubly-extended Newton-Hooke
group, extending our previous study of classical and quantum gravity in 2+1
dimensions in the Galilean limit. We exhibit an r-matrix which is compatible
with our Chern-Simons action (in a sense to be defined) and show that the
associated bi-algebra structure of the Newton-Hooke Lie algebra is that of the
classical double of the extended Heisenberg algebra. We deduce that, in the
quantisation of the theory according to the combinatorial quantisation
programme, much of the quantum theory is determined by the quantum double of
the extended q-deformed Heisenberg algebra.Comment: 22 page | Galilean quantum gravity with cosmological constant and the extended
q-Heisenberg algebra | galilean quantum gravity with cosmological constant and the extended q-heisenberg algebra | galilean cosmological chern simons doubly newton hooke extending galilean limit. exhibit compatible chern simons newton hooke heisenberg algebra. deduce quantisation combinatorial quantisation programme deformed heisenberg | non_dup | [] |
2132466 | 10.1007/JHEP11(2010)021 | We investigate the relation between N=(2,2) superconformal Lie group WZNW
models and Lie supergroup WZNW models. The B-twist of an exactly marginal
perturbation of the world-sheet superconformal sigma model is the supergroup
model. Moreover, the superconformal currents are expressed in terms of Lie
superalgebra currents in the twisted theory. As applications, we find protected
sectors and boundary actions in the supergroup sigma model. A special example
is the relation between string theory on AdS_3 x S^3 x T^4 in the RNS formalism
and the U(1,1|2) x U(1|1) x U(1|1) supergroup WZNW model.Comment: 37 page | From world-sheet supersymmetry to super target spaces | from world-sheet supersymmetry to super target spaces | superconformal wznw supergroup wznw models. twist marginal perturbation sheet superconformal sigma supergroup model. superconformal currents superalgebra currents twisted theory. protected sectors supergroup sigma model. formalism supergroup wznw | non_dup | [] |
2141319 | 10.1007/JHEP11(2010)022 | Configurations of multiple concentric black rings play an important role in
determining the pattern of branchings, connections and mergers between
different phases of higher-dimensional black holes. We examine them using both
approximate and (in five dimensions) exact methods. By identifying the role of
the different scales in the system, we argue that it is possible to have
multiple black ring configurations in which all the rings have equal
temperature and angular velocity. This allows us to correct and improve in a
simple, natural manner, an earlier proposal for the phase diagram of
singly-rotating black holes in $D\geq 6$.Comment: 14 pages, 2 figure | Multi-black rings and the phase diagram of higher-dimensional black
holes | multi-black rings and the phase diagram of higher-dimensional black holes | configurations concentric rings determining branchings connections mergers holes. examine approximate methods. identifying argue configurations rings velocity. manner proposal singly rotating holes .comment pages | non_dup | [] |
2107067 | 10.1007/JHEP11(2010)023 | A simple realization of inflation consists of adding the following operators
to the Einstein-Hilbert action: (partial phi)^2, lambda phi^4, and xi phi^2 R,
with xi a large non-minimal coupling. Recently there has been much discussion
as to whether such theories make sense quantum mechanically and if the inflaton
phi can also be the Standard Model Higgs. In this note we answer these
questions. Firstly, for a single scalar phi, we show that the quantum field
theory is well behaved in the pure gravity and kinetic sectors, since the
quantum generated corrections are small. However, the theory likely breaks down
at ~ m_pl / xi due to scattering provided by the self-interacting potential
lambda phi^4. Secondly, we show that the theory changes for multiple scalars
phi with non-minimal coupling xi phi dot phi R, since this introduces
qualitatively new interactions which manifestly generate large quantum
corrections even in the gravity and kinetic sectors, spoiling the theory for
energies > m_pl / xi. Since the Higgs doublet of the Standard Model includes
the Higgs boson and 3 Goldstone bosons, it falls into the latter category and
therefore its validity is manifestly spoiled. We show that these conclusions
hold in both the Jordan and Einstein frames and describe an intuitive analogy
in the form of the pion Lagrangian. We also examine the recent claim that
curvature-squared inflation models fail quantum mechanically. Our work appears
to go beyond the recent discussions.Comment: 14 pages, 2 figures. Version 2: Clarified findings and improved
wording. Elaborated important sections and removed an unnecessary section.
Added references. Version 3: Updated towards JHEP version. Version 4: Final
JHEP versio | On Inflation with Non-minimal Coupling | on inflation with non-minimal coupling | realization inflation adding einstein hilbert lambda coupling. mechanically inflaton higgs. answer questions. firstly behaved sectors small. breaks interacting lambda secondly scalars introduces qualitatively manifestly sectors spoiling doublet boson goldstone bosons falls validity manifestly spoiled. hold jordan einstein frames intuitive analogy pion lagrangian. examine claim curvature squared inflation fail mechanically. pages figures. clarified wording. elaborated removed unnecessary section. references. updated jhep version. jhep versio | non_dup | [] |
2138004 | 10.1007/JHEP11(2010)024 | In this paper we study dynamical supersymmetry breaking in absence of gravity
with the matter content of the minimal supersymmetric standard model. The
hidden sector of the theory is a strongly coupled gauge theory, realized in
terms of microscopic variables which condensate to form mesons. The
supersymmetry breaking scalar potential combines F, D terms with instanton
generated interactions in the Higgs-mesons sector. We show that for a large
region in parameter space the vacuum breaks in addition to supersymmetry also
electroweak gauge symmetry. We furthermore present local D-brane configurations
that realize these supersymmetry breaking patterns.Comment: 30 pages, 4 figures, pdflate | Dynamical Supersymmetry Breaking in Intersecting Brane Models | dynamical supersymmetry breaking in intersecting brane models | supersymmetry breaking supersymmetric model. hidden realized microscopic condensate mesons. supersymmetry breaking combines instanton mesons sector. breaks supersymmetry electroweak symmetry. brane configurations realize supersymmetry breaking pages pdflate | non_dup | [] |
2137223 | 10.1007/JHEP11(2010)025 | In order to describe the appearance in F theory of the non--simply--laced Lie
algebras, we use the representation of symmetry enhancements by means of string
junctions. After an introduction to the techniques used to describe symmetry
enhancement, that is algebraic geometry, BPS states analysis and string
junctions, we concentrate on the latter. We give an explicit description of the
folding of D_{2n} to B_n of the folding of E_6 to F_4 and that of D_4 to G_2 in
terms of junctions and Jordan strings. We also discuss the case of C_n, but we
are unable in this case to provide a string interpretation.Comment: 24 pages, 3 figure | Non-simply-laced Lie algebras via F theory strings | non-simply-laced lie algebras via f theory strings | appearance laced algebras enhancements junctions. enhancement algebraic junctions concentrate latter. folding folding junctions jordan strings. unable pages | non_dup | [] |
2098355 | 10.1007/JHEP11(2010)026 | We explore the possibility of spontaneous R parity violation in the context
of $A_4$ flavor symmetry. Our model contains $SU(3)_c \times SU(2)_L \times
U(1)_Y$ singlet matter chiral superfields which are arranged as triplet of
$A_4$ and as well as few additional Higgs chiral superfields which are singlet
under MSSM gauge group and belong to triplet and singlet representation under
the $A_4$ flavor symmetry. R parity is broken spontaneously by the vacuum
expectation values of the different sneutrino fields and hence we have
neutrino-neutralino as well as neutrino-MSSM gauge singlet higgsino mixings in
our model, in addition to the standard model neutrino- gauge singlet neutrino,
gaugino-higgsino and higgsino-higgsino mixings. Because all of these mixings we
have an extended neutral fermion mass matrix. We explore the low energy
neutrino mass matrix for our model and point out that with some specific
constraints between the sneutrino vacuum expectation values as well as the MSSM
gauge singlet Higgs vacuum expectation values, the low energy neutrino mass
matrix will lead to a tribimaximal mixing matrix. We also analyze the potential
minimization for our model and show that one can realize a higher vacuum
expectation value of the $SU(3)_c \times SU(2)_L \times U(1)_Y$ singlet
sneutrino fields even when the other sneutrino vacuum expectation values are
extremely small or even zero.Comment: 18 page | Spontaneous R-Parity Violation, $A_4$ Flavor Symmetry and Tribimaximal
Mixing | spontaneous r-parity violation, $a_4$ flavor symmetry and tribimaximal mixing | explore spontaneous parity violation flavor symmetry. singlet chiral superfields arranged triplet chiral superfields singlet mssm belong triplet singlet flavor symmetry. parity broken spontaneously expectation sneutrino neutralino mssm singlet higgsino mixings singlet gaugino higgsino higgsino higgsino mixings. mixings neutral fermion matrix. explore sneutrino expectation mssm singlet expectation tribimaximal matrix. analyze minimization realize expectation singlet sneutrino sneutrino expectation extremely | non_dup | [] |
2121065 | 10.1007/JHEP11(2010)027 | We propose a procedure to clarify part of the physical sector in the five
dimensional bubble geometries based on ideas similar to the split attractor
flow conjecture proposed by Denef. This procedure involves building some simple
tree-like graphs that we call skeletons without referring to the moduli space.
The skeleton (tree) exists if and only if it passes the existence conditions
which are purely based on some local CTC's (closed timelike curves) checking.
Then, we propose the conjecture similar to Denef's version which states that
every existing skeleton (tree) should correspond to some solution in which the
global absence of CTC's is ensured. Furthermore, we propose two pictures to
identify this correspondence explicitly and use some numerical examples to show
how this procedure works. We also analyze the physical sector of the simplest
bubbled supertube and see how the existence conditions constrain the charge
parameter space.Comment: 46 pages, 31 figures; v2: JHEP style, discussion in section 3
generally improved, additional section 3.3 included for clarification, typos
and wording correcte | Split Flows in Bubbled Geometries | split flows in bubbled geometries | propose clarify bubble geometries ideas split attractor conjecture denef. involves call skeletons referring moduli space. skeleton passes purely timelike checking. propose conjecture denef skeleton ensured. propose pictures correspondence explicitly works. analyze simplest bubbled supertube constrain pages jhep style clarification typos wording correcte | non_dup | [] |
2136030 | 10.1007/JHEP11(2010)028 | Writing the fully color dressed and graviton amplitudes, respectively, as
${\bf A}=<C|A> =<C|M|N> $ and ${\bf A}_{gr}= <\tilde N|M|N> $, where $|A> $ is
a set of Kleiss-Kuijf color-ordered basis, $|N>, $|\tilde N> $ and $|C>$ are
the similarly ordered numerators and color coefficients, we show that the
propagator matrix $M$ has $(n-3)(n-3)!$ independent eigenvectors $|\lambda
^0_j>$ with zero eigenvalue, for $n$-particle processes. The resulting
equations $<\lambda ^0_j|A> = 0$ are relations among the color ordered
amplitudes. The freedom to shift $|N> \to |N> +\sum_j f_j|\lambda ^0_j>$ and
similarly for $|\tilde N>$, where $f_j$ are $(n-3)(n-3)!$ arbitrary functions,
encodes generalized gauge transformations. They yield both BCJ amplitude and
KLT relations, when such freedom is accounted for. Furthermore, $f_j$ can be
promoted to the role of effective Lagrangian vertices in the field operator
space.Comment: 22 pages, JHEP version, Appendix A expanded, one typo fixe | Constraints and Generalized Gauge Transformations on Tree-Level Gluon
and Graviton Amplitudes | constraints and generalized gauge transformations on tree-level gluon and graviton amplitudes | writing dressed graviton amplitudes tilde kleiss kuijf ordered tilde ordered numerators propagator eigenvectors lambda eigenvalue processes. lambda ordered amplitudes. freedom lambda tilde encodes transformations. freedom accounted for. promoted lagrangian pages jhep expanded typo fixe | non_dup | [] |
2144304 | 10.1007/JHEP11(2010)029 | Recently a model has been proposed that links dark matter and neutrino
masses. The dark matter candidate which is dubbed as SLIM has a mass of MeV
scale and can show up at low energy experiments. The model also has a high
energy sector which consists of a scalar doublet, $(\phi^-, \phi^0)$. We
discuss the potential of the LHC for discovering the new scalars. We focus on
the $\phi^+\phi^-$ and $\phi^{\pm} \phi^0$ production and the subsequent decay
of the charged scalar to a charged lepton and the SLIM which appears as missing
energy. Identifying the background, we estimate the signal significance and
find that it can exceed $5 \sigma$ at 30 ${\rm fb}^{-1}$ for the 14 TeV run at
the LHC. We comment on the possibility of extracting the flavor structure of
the Yukawa couplings which also determine the neutrino mass matrix. Finally, we
discuss the prospects of this search at the current 7 TeV run of the LHC.Comment: 26 pages, 21 figure | SLIM at LHC: LHC search power for a model linking dark matter and
neutrino mass | slim at lhc: lhc search power for a model linking dark matter and neutrino mass | links masses. candidate dubbed slim experiments. doublet discovering scalars. lepton slim missing energy. identifying exceed sigma lhc. comment extracting flavor yukawa couplings matrix. prospects pages | non_dup | [] |
2144108 | 10.1007/JHEP11(2010)030 | This work explores the role of thermodynamic fluctuations in the two
parameter Hawking radiating black hole configurations. The system is
characterized by an ensemble of arbitrary mass and radiation frequency of the
black holes. In the due course of the Hawking radiations, we find that the
intrinsic geometric description exhibits an intriguing set of exact pair
correction functions and global correlation lengths. We investigate the nature
of the constant amplitude radiation and find that it's not stable under
fluctuations of the mass and frequency. Subsequently, the consideration of the
York model decreasing amplitude radiation demonstrates that thermodynamic
fluctuations are globally stable in the small frequency region. In connection
with quantum gravity refinements, we take an account of the logarithmic
correction into the constant amplitude and York amplitude over the Hawking
radiation. In both considerations, we notice that the nature of the possible
parametric fluctuations may precisely be ascertained without any approximation.
In the frequency domain $w \in (0, \infty)$, we observe that both the local and
the global thermodynamic fluctuations of the radiation energy flux are stable
in the s-channel. The intrinsic geometry exemplifies a definite stability
character to the thermodynamic fluctuations, and up to finitely many
topological defects on the parametric surface, the notion remains almost the
same for both the constant amplitude and the York model. The Gaussian
fluctuations over equilibrium radiation energy flux and fluctuating horizon
configurations accomplish a well-defined, non-degenerate, curved and regular
intrinsic Riemannian manifolds, for all the physically admissible domains of
the radiation parameters.
PACS numbers: 04.70.-s: Physics of black holes; 04.70.-Bw: Classical black
holes; 04.70.Dy Quantum aspects of black holes, evaporation, thermodynamics;
04.60.Cf Gravitational aspects of string theory.
Keywords: Quantum Gravity, Hawking Radiation; Horizon Perturbations; Vaidya
Geometry; York Model; Statistical Fluctuations; Thermodynamic ConfigurationsComment: 38 pages, 12 figure | Thermodynamic Geometry and Hawking Radiation | thermodynamic geometry and hawking radiation | explores thermodynamic hawking radiating configurations. ensemble holes. hawking radiations intrinsic geometric exhibits intriguing lengths. frequency. subsequently consideration decreasing demonstrates thermodynamic globally region. connection refinements logarithmic hawking radiation. considerations notice parametric precisely ascertained approximation. infty thermodynamic channel. intrinsic exemplifies definite character thermodynamic finitely topological defects parametric notion model. fluctuating horizon configurations accomplish degenerate curved intrinsic riemannian manifolds physically admissible parameters. pacs holes holes holes evaporation thermodynamics gravitational theory. keywords hawking horizon perturbations vaidya thermodynamic configurationscomment pages | non_dup | [] |
2139529 | 10.1007/JHEP11(2010)031 | We resume our discussion of the new orbifold-string theories of
permutation-type, focusing in the present series on the algebraic formulation
of the general bosonic prototype and especially the target space-times of the
theories. In this first paper of the series, we construct one twisted BRST
system for each cycle $j$ in each twisted sector $\sigma$ of the general case,
verifying in particular the previously-conjectured algebra
$[Q_{i}(\sigma),Q_{j}(\sigma)]_{+} =0$ of the BRST charges. The BRST systems
then imply a set of extended physical-state conditions for the matter of each
cycle at cycle central charge $\hat{c}_{j}(\sigma)=26f_{j}(\sigma)$ where
$f_{j}(\sigma)$ is the length of cycle $j$.Comment: 31 page | The Orbifold-String Theories of Permutation-Type: I. One Twisted BRST
per Cycle per Sector | the orbifold-string theories of permutation-type: i. one twisted brst per cycle per sector | resume orbifold permutation focusing algebraic formulation bosonic prototype theories. twisted brst twisted sigma verifying conjectured sigma sigma brst charges. brst imply sigma sigma sigma .comment | non_dup | [] |
2138852 | 10.1007/JHEP11(2010)032 | We discuss a hidden symmetry of a two-dimensional sigma model on a squashed
S^3. The SU(2) current can be improved so that it can be regarded as a flat
connection. Then we can obtain an infinite number of conserved non-local
charges and show the Yangian algebra by directly checking the Serre relation.
This symmetry is also deduced from the coset structure of the squashed sphere.
The same argument is applicable to the warped AdS_3 spaces via double Wick
rotations.Comment: 11 pages, 1 figure, typos corrected, references adde | Hidden Yangian symmetry in sigma model on squashed sphere | hidden yangian symmetry in sigma model on squashed sphere | hidden sigma squashed regarded connection. infinite conserved charges yangian checking serre relation. deduced coset squashed sphere. argument applicable warped wick pages typos corrected adde | non_dup | [] |
2125573 | 10.1007/JHEP11(2010)033 | The weak gravity conjecture and the shear viscosity to entropy density bound
place constraints on low energy effective field theories that may help to
distinguish which theories can be UV completed. Recently, there have been
suggestions of a possible correlation between the two constraints. In some
interesting cases, the behavior was precisely such that the conjectures were
mutually exclusive. Motivated by these works, we study the mass to charge and
shear viscosity to entropy density ratios for charged AdS5 black branes, which
are holographically dual to four-dimensional CFTs at finite temperature. We
study a family of four-derivative and six-derivative perturbative corrections
to these backgrounds. We identify the region in parameter space where the two
constraints are satisfied and in particular find that the inclusion of the
next-to-leading perturbative correction introduces wider possibilities for the
satisfaction of both constraints.Comment: 24 pages, 6 figures, v2: published version, refs added, minor
clarificatio | The Weak Gravity Conjecture and the Viscosity Bound with Six-Derivative
Corrections | the weak gravity conjecture and the viscosity bound with six-derivative corrections | conjecture viscosity distinguish completed. suggestions constraints. precisely conjectures mutually exclusive. motivated viscosity branes holographically cfts temperature. perturbative backgrounds. satisfied inclusion perturbative introduces wider possibilities satisfaction pages refs minor clarificatio | non_dup | [] |
2119005 | 10.1007/JHEP11(2010)034 | Aging phenomena are examples of `non-equilibrium criticality' and can be
exemplified by systems with Galilean and scaling symmetries but no time
translation invariance. We realize aging holographically using a deformation of
a non-relativistic version of gauge/gravity duality. Correlation functions of
scalar operators are computed using holographic real-time techniques, and agree
with field theory expectations. At least in this setup, general aging phenomena
are reproduced holographically by complexifying the bulk space-time geometry,
even in Lorentzian signature.Comment: 1 pdf figur | Aging and Holography | aging and holography | aging phenomena criticality exemplified galilean symmetries translation invariance. realize aging holographically deformation relativistic duality. holographic agree expectations. setup aging phenomena reproduced holographically complexifying lorentzian figur | non_dup | [] |
2134360 | 10.1007/JHEP11(2010)035 | We obtain concise analytic formulae for Wilson loops computed on special
n-point polygonal contours through two-loops in weakly coupled N=4
supersymmetric gauge theory. The contours we consider can be embedded into a
(1+1)-dimensional subspace of the 4-dimensional gauge theory, corresponding to
the boundary of the AdS_3 on the string theory side. Our analytic results hold
for any number of edges, thus generalising to arbitrary n the recently derived
expressions for 2-dimensional octagons. These polygonal Wilson loops have been
conjectured to be equivalent to MHV scattering amplitudes in planar N=4 SYM.Comment: 20 pages, 6 figure | Analytic Results for MHV Wilson Loops | analytic results for mhv wilson loops | concise analytic formulae wilson loops polygonal contours loops weakly supersymmetric theory. contours embedded subspace side. analytic hold generalising expressions octagons. polygonal wilson loops conjectured amplitudes planar pages | non_dup | [] |
2136300 | 10.1007/JHEP11(2010)036 | Near-extreme Reissner-Nordstrom-anti-de Sitter black holes are unstable
against the condensation of an uncharged scalar field with mass close to the
Breitenlohner-Freedman bound. It is shown that a similar instability afflicts
near-extreme large rotating AdS black holes, and near-extreme hyperbolic
Schwarzschild-AdS black holes. The resulting nonlinear hairy black hole
solutions are determined numerically. Some stability results for (possibly
charged) scalar fields in black hole backgrounds are proved. For most of the
extreme black holes we consider, these demonstrate stability if the ``effective
mass" respects the near-horizon BF bound. Small spherical
Reissner-Nordstrom-AdS black holes are an interesting exception to this result.Comment: 34 pages; 13 figure | A scalar field condensation instability of rotating anti-de Sitter black
holes | a scalar field condensation instability of rotating anti-de sitter black holes | extreme reissner nordstrom sitter holes unstable condensation uncharged breitenlohner freedman bound. instability afflicts extreme rotating holes extreme hyperbolic schwarzschild holes. hairy numerically. possibly backgrounds proved. extreme holes respects horizon bound. spherical reissner nordstrom holes exception pages | non_dup | [] |
2129449 | 10.1007/JHEP11(2010)038 | Within a supersymmetric (SUSY) type-I seesaw framework with flavor-blind
universal boundary conditions, we study the consequences of requiring that the
observed baryon asymmetry of the Universe be explained by either thermal or
non-thermal leptogenesis. In the former case, we find that the parameter space
is very constrained. In the bulk and stop-coannihilation regions of mSUGRA
parameter space (that are consistent with the measured dark matter abundance),
lepton flavor-violating (LFV) processes are accessible at MEG and future
experiments. However, the very high reheat temperature of the Universe needed
after inflation (of about 10^{12} GeV) leads to a severe gravitino problem,
which disfavors either thermal leptogenesis or neutralino dark matter.
Non-thermal leptogenesis in the preheating phase from SUSY flat directions
relaxes the gravitino problem by lowering the required reheat temperature. The
baryon asymmetry can then be explained while preserving neutralino dark matter,
and for the bulk or stop-coannihilation regions LFV processes should be
observed in current or future experiments.Comment: 20 pages, 5 figures, 1 tabl | Examining leptogenesis with lepton flavor violation and the dark matter
abundance | examining leptogenesis with lepton flavor violation and the dark matter abundance | supersymmetric susy seesaw flavor blind universal consequences requiring baryon asymmetry universe leptogenesis. former constrained. stop coannihilation msugra abundance lepton flavor violating accessible experiments. reheat universe inflation gravitino disfavors leptogenesis neutralino matter. leptogenesis preheating susy directions relaxes gravitino lowering reheat temperature. baryon asymmetry preserving neutralino stop coannihilation pages tabl | non_dup | [] |
2138818 | 10.1007/JHEP11(2010)039 | We calculate the ttbar forward-backward asymmetry, A_FB^t, in Randall-Sundrum
(RS) models taking into account the dominant next-to-leading order (NLO)
corrections in QCD. At Born level we include the exchange of Kaluza-Klein (KK)
gluons and photons, the Z boson and its KK excitations, as well as the Higgs
boson, whereas beyond the leading order (LO) we consider the interference of
tree-level KK-gluon exchange with one-loop QCD box diagrams and the
corresponding bremsstrahlungs corrections. We find that the strong suppression
of LO effects, that arises due to the elementary nature and the mostly
vector-like couplings of light quarks, is lifted at NLO after paying the price
of an additional factor of alpha_s/(4 pi). In spite of this enhancement, the
resulting RS corrections in A_FB^t remain marginal, leaving the predicted
asymmetry SM-like. As our arguments are solely based on the smallness of the
axial-vector couplings of light quarks to the strong sector, our findings are
model-independent and apply to many scenarios of new physics that address the
flavor problem via geometrical sequestering.Comment: 29 pages, 1 table, 5 figures; v2: matches version published in JHE | Top-Quark Forward-Backward Asymmetry in Randall-Sundrum Models Beyond
the Leading Order | top-quark forward-backward asymmetry in randall-sundrum models beyond the leading order | ttbar backward asymmetry randall sundrum qcd. born kaluza klein gluons photons boson excitations boson interference gluon diagrams bremsstrahlungs corrections. suppression arises elementary mostly couplings quarks lifted paying alpha spite enhancement marginal leaving asymmetry like. arguments solely smallness axial couplings quarks scenarios flavor geometrical pages matches | non_dup | [] |
2143316 | 10.1007/JHEP11(2010)041 | The F-theory background of four D7 branes in a type I' orientifold was
conjectured to be described by the Seiberg-Witten curve for the superconformal
SU(2) gauge theory with four flavors. This relation was explained by
considering in this background a probe D3 brane, which supports this theory
with SU(2) realized as Sp(1). Here we explicitly compute the non-perturbative
corrections to the D7/D3 system in type I' due to D-instantons. This
computation provides both the quartic effective action on the D7 branes and the
quadratic effective action on the D3 brane; the latter agrees with the
F-theoretic prediction. The action obtained in this way is related to the one
derived from the usual instanton calculus \`a la Nekrasov (or from its AGT
realization in terms of Liouville conformal blocks) by means of a
non-perturbative redefinition of the coupling constant. We also point out an
intriguing relation between the four-dimensional theory on the probe D3 brane,
which has a SO(8) flavor symmetry, and the eight-dimensional dynamics on the D7
branes. On the latter, SO(8) represents a gauge group and the flavor masses
correspond to the vacuum expectation values of an adjoint scalar field m: what
we find is that the exact effective coupling in four dimensions is obtained
from its perturbative part by taking into account in its mass dependence the
full quantum dynamics of the field m in eight dimensions.Comment: 44 pages, 2 figures, PdfLaTeX. V2: Typos fixed, a few references
added, Eq. (2.28) corrected, improved discussion in Section 3.4, a couple of
sentences reformulated in section 7. Version published on JHE | F-theoretic vs microscopic description of a conformal N=2 SYM theory | f-theoretic vs microscopic description of a conformal n=2 sym theory | branes orientifold conjectured seiberg witten superconformal flavors. brane supports realized explicitly perturbative instantons. quartic branes quadratic brane agrees theoretic prediction. usual instanton calculus nekrasov realization liouville conformal blocks perturbative redefinition constant. intriguing brane flavor eight branes. flavor expectation adjoint perturbative eight pages pdflatex. typos corrected couple sentences reformulated | non_dup | [] |
2148269 | 10.1007/JHEP11(2010)042 | We investigate the structure of the moduli space of multiple BPS non-Abelian
vortices in U(N) gauge theory with N fundamental Higgs fields, focusing our
attention on the action of the exact global (color-flavor diagonal) SU(N)
symmetry on it. The moduli space of a single non-Abelian vortex, CP(N-1), is
spanned by a vector in the fundamental representation of the global SU(N)
symmetry. The moduli space of winding-number k vortices is instead spanned by
vectors in the direct-product representation: they decompose into the sum of
irreducible representations each of which is associated with a Young tableau
made of k boxes, in a way somewhat similar to the standard group composition
rule of SU(N) multiplets. The K\"ahler potential is exactly determined in each
moduli subspace, corresponding to an irreducible SU(N) orbit of the
highest-weight configuration.Comment: LaTeX 46 pages, 4 figure | Group Theory of Non-Abelian Vortices | group theory of non-abelian vortices | moduli abelian vortices focusing flavor diagonal moduli abelian vortex spanned symmetry. moduli winding vortices spanned decompose irreducible representations tableau boxes somewhat multiplets. ahler moduli subspace irreducible orbit latex pages | non_dup | [] |
2138978 | 10.1007/JHEP11(2010)043 | The star-product between functions enable us to take the large $N$ limit in a
controlled way. At finite $N$ it serves as a substitute for matrix
multiplications. Non-abelian gauge theory can be deconstructed from lower
dimensional gauge theories using star-products. In this paper we extend the
star-product to a star-three-product. We then apply the star-three-product to
realize hermitian three-algebra of ABJM theory. We define a fuzzy three-torus.
We deconstruct Abelian M five-brane in a constant background three-form
potential on a fuzzy three-torus. We deconstruct non-Abelian extensions which
might be related with multiple M five branes. We also mention the fuzzy
three-sphere case.Comment: 53 page | An associative star-three-product and applications to M two/M five-brane
theory | an associative star-three-product and applications to m two/m five-brane theory | enable way. serves substitute multiplications. abelian deconstructed products. extend product. realize hermitian abjm theory. fuzzy torus. deconstruct abelian brane fuzzy torus. deconstruct abelian extensions branes. mention fuzzy sphere | non_dup | [] |
2136020 | 10.1007/JHEP11(2010)044 | We present a calculation of the two-loop bottom-sbottom-gluino contributions
to Higgs boson production via gluon fusion in the MSSM. The calculation is
based on an asymptotic expansion in the masses of the supersymmetric particles,
which are assumed to be much heavier than the bottom quark and the Higgs
bosons. We obtain explicit analytic results that allow for a straightforward
identification of the dominant contributions in the NLO bottom corrections. We
emphasize the interplay between the calculations of the masses and the
production cross sections of the Higgs bosons, discussing sensible choices of
renormalization scheme for the parameters in the bottom/sbottom sector.Comment: 25 pages, 4 figures. v2: references and two figures added, version
published in JHE | NLO QCD bottom corrections to Higgs boson production in the MSSM | nlo qcd bottom corrections to higgs boson production in the mssm | sbottom gluino boson gluon fusion mssm. asymptotic supersymmetric heavier bosons. analytic straightforward corrections. emphasize interplay bosons discussing sensible choices renormalization sbottom pages figures. | non_dup | [] |
2131655 | 10.1007/JHEP11(2010)045 | We analyze the potential sensitivity of a search for $e\rightarrow\tau$
conversion at a proposed electron-ion collider (EIC) facility. To that end, we
calculate the cross sections for $e\rightarrow\tau$ events in a leptoquark
framework assuming that the leptoquark masses are on the order of several
hundred GeV or more. Given present limits on leptoquarks from direct searches
at HERA and rare decay processes, an EIC sensitive to 0.1 fb $e\rightarrow\tau$
cross sections could probe previously unexplored regions of parameter space for
these lepton flavor violating events (assuming 90 GeV center-of-mass energy and
10 fb$^{-1}$ integrated luminosity). Depending on the species of leptoquark and
flavor structure of the couplings, an EIC search could surpass the HERA and
rare process sensitivity to $e\rightarrow\tau$ conversion amplitudes by as much
as an order of magnitude or more. We also derive updated limits on quark
flavor-diagonal LFV leptoquark interactions using the most recent BaBar
$\tau\rightarrow e\gamma$ search. We find that limits from an EIC
$e\rightarrow\tau$ search could be competitive with the most recent
$\tau\rightarrow e\gamma$ limit for a subset of the quark flavor-diagonal
leptoquark couplings. Using an SU(5) GUT model in which leptoquark couplings
are constrained by the neutrino masses and mixing, we illustrate how observable
leptoquark-induced $e\rightarrow\tau$ conversion can be consistent with
stringent LFV limits imposed by $\mu\rightarrow e\gamma$ and $\mu\rightarrow e$
conversion searches.Comment: 19 pages, 7 figure | Electron-to-Tau Lepton Flavor Violation at the Electron-Ion Collider | electron-to-tau lepton flavor violation at the electron-ion collider | analyze rightarrow conversion collider facility. rightarrow leptoquark leptoquark hundred more. leptoquarks searches hera rare rightarrow unexplored lepton flavor violating luminosity leptoquark flavor couplings surpass hera rare rightarrow conversion amplitudes more. derive updated flavor diagonal leptoquark babar rightarrow gamma search. rightarrow competitive rightarrow gamma flavor diagonal leptoquark couplings. leptoquark couplings constrained illustrate observable leptoquark rightarrow conversion stringent imposed rightarrow gamma rightarrow conversion pages | non_dup | [] |
2145140 | 10.1007/JHEP11(2010)046 | We study the Tevatron signatures of promptly-decaying slepton co-NLSPs in the
context of General Gauge Mediation (GGM). The signatures consist of trileptons
plus MET and same-sign dileptons plus MET. Focusing first on electroweak
production, where the Tevatron has an advantage over the early LHC, we
establish four simple benchmark scenarios within the parameter space of GGM
which qualitatively capture all the relevant phenomenology. We derive limits on
these benchmarks from existing searches, estimate the discovery potential with
10 fb^-1, and discuss ways in which these searches can be optimized for slepton
co-NLSPs. We also analyze the Tevatron constraints on a scenario with light
gluinos that could be discovered at the early LHC. Overall, we find that the
Tevatron still has excellent reach for the discovery of SUSY in multilepton
final states. Finally, we comment on the possible interpretation of a mild
"excess" in the CDF same-sign dilepton search in terms of slepton co-NLSPs.Comment: 31 pages + appendices, published version, references adde | Slepton co-NLSPs at the Tevatron | slepton co-nlsps at the tevatron | tevatron signatures promptly decaying slepton nlsps mediation signatures consist trileptons dileptons met. focusing electroweak tevatron advantage establish benchmark scenarios qualitatively capture phenomenology. derive benchmarks searches discovery ways searches optimized slepton nlsps. analyze tevatron gluinos discovered lhc. tevatron excellent discovery susy multilepton states. comment mild excess dilepton slepton pages appendices adde | non_dup | [] |
2135006 | 10.1007/JHEP11(2010)047 | Understanding the strong coupling limit of massive type IIA string theory is
a longstanding problem. We argue that perhaps this problem does not exist;
namely, there may be no strongly coupled solutions of the massive theory. We
show explicitly that massive type IIA string theory can never be strongly
coupled in a weakly curved region of space-time. We illustrate our general
claim with two classes of massive solutions in AdS4xCP3: one, previously known,
with N = 1 supersymmetry, and a new one with N = 2 supersymmetry. Both
solutions are dual to d = 3 Chern-Simons-matter theories. In both these massive
examples, as the rank N of the gauge group is increased, the dilaton initially
increases in the same way as in the corresponding massless case; before it can
reach the M-theory regime, however, it enters a second regime, in which the
dilaton decreases even as N increases. In the N = 2 case, we find
supersymmetry-preserving gauge-invariant monopole operators whose mass is
independent of N. This predicts the existence of branes which stay light even
when the dilaton decreases. We show that, on the gravity side, these states
originate from D2-D0 bound states wrapping the vanishing two-cycle of a
conifold singularity that develops at large N.Comment: 43 pages, 5 figures. v2: added reference | Massive type IIA string theory cannot be strongly coupled | massive type iia string theory cannot be strongly coupled | massive longstanding problem. argue perhaps massive theory. explicitly massive never weakly curved time. illustrate claim massive supersymmetry supersymmetry. chern simons theories. massive dilaton initially massless enters dilaton increases. supersymmetry preserving monopole predicts branes stay dilaton decreases. originate wrapping vanishing conifold singularity develops pages figures. | non_dup | [] |
2126014 | 10.1007/JHEP11(2010)049 | The model proposed by A. Zee (1986) and K.S. Babu (1988) is a simple
radiative seesaw model, in which tiny neutrino masses are generated at the
two-loop level. We investigate a supersymmetric extension of the Zee-Babu model
under R-parity conservation. The lightest superpartner particle can then be a
dark matter candidate. We find that the neutrino data can be reproduced with
satisfying current data from lepton flavour violation even in the scenario
where not all the superpartner particles are heavy. Phenomenology at the Large
Hadron Collider is also discussed.Comment: 19 pages, 5 figure | An R-parity conserving radiative neutrino mass model without
right-handed neutrinos | an r-parity conserving radiative neutrino mass model without right-handed neutrinos | k.s. babu radiative seesaw tiny level. supersymmetric babu parity conservation. lightest superpartner candidate. reproduced satisfying lepton flavour violation superpartner heavy. phenomenology hadron collider pages | non_dup | [] |
11275011 | 10.1007/JHEP11(2010)050 | The highest exclusive jet multiplicity studied at LEP experiments is five. In this paper we compute the next-to-leading order QCD corrections to e + e ‑ annihilation to five jets, essentially closing the (pure) perturbative QCD studies of exclusive jetty final states at LEP. We compare fixed-order perturbative results with ALEPH data. We estimate hadronization corrections to five-jet observables using the event generator SHERPA, which employs the CKKW procedure to combine a reliable perturbative treatment of high-multiplicity jet final states with parton showers. We show that a competitive value of the strong coupling constant {α_s}left( {{M_Z}} right) = 0.1156_{ - 0.0034}^{ + 0.0041} can be extracted from the distribution of the five-jet resolution parameter and the five-jet rate at LEP1 and LEP2 | NLO QCD corrections to five-jet production at LEP and the extraction of αs(MZ) | nlo qcd corrections to five-jet production at lep and the extraction of αs(mz) | exclusive multiplicity five. annihilation jets essentially closing perturbative exclusive jetty lep. perturbative aleph data. hadronization observables generator sherpa employs ckkw combine reliable perturbative multiplicity parton showers. competitive | non_dup | [] |
2134814 | 10.1007/JHEP11(2010)051 | The AdS/CFT correspondence in principle gives a new approach to deep
inelastic scattering as formulated by Polchinski and Strassler. Subsequently
Brower, Polchinski, Strassler and Tan (BPST) computed the strong coupling
kernel for the vacuum (or Pomeron) contribution to total cross sections. By
identifying deep inelastic scattering with virtual photon total cross section,
this allows a self consistent description at small-$x$ where the dominant
contribution is the vacuum exchange process. Here we formulate this
contribution and compare it with HERA small-$x$ DIS scattering data. We find
that the BPST kernel along with a very simple local approximation to the proton
and current "wave functions" gives a remarkably good fit not only at large
$Q^2$ dominated by conformal symmetry but also extends to small $Q^2$,
supplemented by a hard-wall cut-off of the AdS in the IR. We suggest that this
is a useful phenomenological parametrization with implications for other
diffractive processes, such as double diffractive Higgs production.Comment: 31 pages, 9 figures. More references and several few clarifying
remarks added. Fits to the most recent H1/ZEUS data unchange | String-Gauge Dual Description of Deep Inelastic Scattering at Small-$x$ | string-gauge dual description of deep inelastic scattering at small-$x$ | correspondence inelastic formulated polchinski strassler. subsequently brower polchinski strassler bpst kernel pomeron sections. identifying inelastic virtual process. formulate hera data. bpst kernel proton remarkably dominated conformal extends supplemented phenomenological parametrization diffractive diffractive pages figures. clarifying remarks added. fits zeus unchange | non_dup | [] |
2137907 | 10.1007/JHEP11(2010)052 | We study the role of D-terms in supersymmetry (SUSY) breaking. By carefully
analyzing the SUSY multiplets containing various conserved currents in theories
with global symmetries, we obtain a number of constraints on the
renormalization group flow in supersymmetric field theories. Under broad
assumptions, these results imply that there are no SUSY-breaking vacua, not
even metastable ones, with parametrically large D-terms. This explains the
absence of such D-terms in models of dynamical SUSY-breaking. There is,
however, a rich class of calculable models which generate comparable D-terms
and F-terms through a variety of non-perturbative effects; these D-terms can be
non-abelian. We give several explicit examples of such models, one of which is
a new calculable limit of the 3-2 model.Comment: 34 pages, 2 figures; reference added, minor change | Global Symmetries and D-Terms in Supersymmetric Field Theories | global symmetries and d-terms in supersymmetric field theories | supersymmetry susy breaking. carefully analyzing susy multiplets conserved currents symmetries renormalization supersymmetric theories. broad assumptions imply susy breaking vacua metastable parametrically terms. explains susy breaking. calculable comparable perturbative abelian. calculable pages minor | non_dup | [] |
2141515 | 10.1007/JHEP11(2010)054 | We argue that the entanglement entropy offers us a useful coarse-grained
entropy in time-dependent AdS/CFT. We show that the total von-Neumann entropy
remains vanishing even when a black hole is created in a gravity dual, being
consistent with the fact that its corresponding CFT is described by a
time-dependent pure state. We analytically calculate the time evolution of
entanglement entropy for a free Dirac fermion on a circle following a quantum
quench. This is interpreted as a toy holographic dual of black hole creations
and annihilations. It is manifestly free from the black hole information
problem.Comment: 25 pages, Latex, 8 figure | Measuring Black Hole Formations by Entanglement Entropy via
Coarse-Graining | measuring black hole formations by entanglement entropy via coarse-graining | argue entanglement offers coarse grained cft. neumann vanishing created state. analytically entanglement dirac fermion circle quench. interpreted holographic creations annihilations. manifestly pages latex | non_dup | [] |
2141980 | 10.1007/JHEP11(2010)055 | We obtain a holographical description of a superconductor by using the d=2
case of the AdS_{d+1}/CFT_d correspondence. The gravity system is a
(2+1)-dimensional AdS black hole coupled to a Maxwell field and charged scalar.
The dual (1+1)-dimensional superconductor will be strongly correlated. The
characteristic exponents for vector perturbations at the boundary degenerate,
which implies that d=2 is a critical dimension and the Green's function needs
to be regularized. In the normal phase, the current-current correlation
function and the conductivity can be analytically solved at zero chemical
potential. The dc conductivity can be analytically solved at finite chemical
potential. When we add a scalar hair to the black hole, a charged condensate
happens at low temperatures. We compare our results with higher-dimensional
cases.Comment: 22 pages, 7 figures; v2: minor corrections; v3: published versio | One-dimensional holographic superconductor from AdS_3/CFT_2
correspondence | one-dimensional holographic superconductor from ads_3/cft_2 correspondence | holographical superconductor correspondence. maxwell scalar. superconductor correlated. exponents perturbations degenerate regularized. conductivity analytically solved potential. conductivity analytically solved potential. hair condensate happens temperatures. pages minor versio | non_dup | [] |
2128620 | 10.1007/JHEP11(2010)056 | We study the quasiclassical expansion associated with a complex curve. In a
more specific context this is the 1/N expansion in U(N)-invariant matrix
integrals. We compare two approaches, the CFT approach and the topological
recursion, and show their equivalence. The CFT approach reformulates the
problem in terms of a conformal field theory on a Riemann surface, while the
topological recursion is based on a recurrence equation for the observables
representing symplectic invariants on the complex curve. The two approaches
lead to two different graph expansions, one of which can be obtained as a
partial resummation of the other.Comment: Minor correction | CFT and topological recursion | cft and topological recursion | quasiclassical curve. integrals. topological recursion equivalence. reformulates conformal riemann topological recursion recurrence observables representing symplectic invariants curve. expansions resummation minor | non_dup | [] |
2125267 | 10.1007/JHEP11(2010)058 | We compute three-body nuclear forces at short distances by using the nuclear
matrix model of holographic QCD proposed in our previous paper with P. Yi. We
find that the three-body forces at short distances are repulsive for (a)
aligned three neutrons with averaged spins, and (b) aligned
proton-proton-neutron / proton-neutron-neutron. These indicate that in dense
states of neutrons such as cores of neutron stars, or in Helium-3 / tritium
nucleus, the repulsive forces are larger than the ones estimated from two-body
forces only.Comment: 25 pages. v2: references adde | Three-Body Nuclear Forces from a Matrix Model | three-body nuclear forces from a matrix model | forces distances holographic forces distances repulsive aligned neutrons averaged spins aligned proton proton neutron proton neutron neutron. dense neutrons cores neutron helium tritium nucleus repulsive forces forces pages. adde | non_dup | [] |
2122209 | 10.1007/JHEP11(2010)061 | We investigate lepton flavor violating (LFV) radiative processes and the
relic abundance of neutralino dark matter in supersymmetric type-I seesaw
model. We carefully derive threshold corrections to the flavor off-diagonal
elements of slepton mass matrix and up-type Higgs mass squared and find that
they can be large in the case of large $B_N^0$. We examine how the branching
ratios of LFV radiative decays and the relic abundance of neutralino dark
matter can be significantly affected by the large threshold corrections. Soft
scalar mass squared parameter of up-type Higgs scalar is also affected by the
threshold corrections. Since the higgsino mass depends on the mass parameter
for up-type Higgs, the LFV processes and the relic abundance of the neutralino
dark matter are correlated with each other. We show that there are parameter
regions where the predictions of the relic abundance of neutralino dark matter
are consistent with WMAP observation and the branching ratios of LFV radiative
decays are predicted to be testable in future experiments. We find that the
masses of scalar supersymmetric particles are not necessarily small so that the
branching ratios of LFV decays can be testable in future experiment, which is
distinctive feature of this scenario.Comment: 32 pages, 6 figures, references are added, the version to appear in
JHE | Effects of Large Threshold Corrections in Supersymmetric Type-I Seesaw
Model | effects of large threshold corrections in supersymmetric type-i seesaw model | lepton flavor violating radiative relic abundance neutralino supersymmetric seesaw model. carefully derive flavor diagonal slepton squared examine branching radiative decays relic abundance neutralino corrections. squared corrections. higgsino relic abundance neutralino other. relic abundance neutralino wmap branching radiative decays testable experiments. supersymmetric necessarily branching decays testable distinctive pages | non_dup | [] |
2141405 | 10.1007/JHEP11(2010)062 | We study extremal cohomogeneity one five-dimensional asymptotically flat
black holes of minimal supergravity in terms of the geodesics generated by
nilpotent elements of the Lie algebra g2(2) on the coset manifold
G2(2)/SO(2,2). There are two branches of regular extremal black holes with
these properties: (i) the supersymmetric BMPV branch, and (ii) the
non-supersymmetric extremal branch. We show that both of these branches are
reproduced by nilpotent SO(2,2)-orbits. Furthermore, we show that the partial
ordering of nilpotent orbits of G2(2) is in one-to-one correspondence with the
phase diagram of these extremal black holes.Comment: 17 pages, 2 figures; v2 two minus sign typos in appendix A equation
(A.3) corrected, no other change | Extremal limits of the Cvetic-Youm black hole and nilpotent orbits of
G2(2) | extremal limits of the cvetic-youm black hole and nilpotent orbits of g2(2) | extremal cohomogeneity asymptotically holes supergravity geodesics nilpotent coset manifold branches extremal holes supersymmetric bmpv branch supersymmetric extremal branch. branches reproduced nilpotent orbits. ordering nilpotent orbits correspondence extremal pages minus typos corrected | non_dup | [] |
2115183 | 10.1007/JHEP11(2010)063 | We investigate the dynamics of a pair of coincident D5 branes in the
background of $k$ NS5 branes. It has been proposed by Kutasov that the system
with a single probing D-brane moving radially in this background is dual to the
tachyonic DBI action for a non-BPS Dp brane. We extend this proposal to the
non-abelian case and find that the duality still holds provided one promotes
the radial direction to a matrix valued field associated with a non-abelian
geometric tachyon and a particular parametrization for the transverse scalar
fields is chosen. The equations of motion of a pair of coincident D5 branes
moving in the NS5 background are determined. Analytic and numerical solutions
for the pair are found in certain simplified cases in which the U(2) symmetry
is broken to $U(1) \times U(1)$ corresponding to a small transverse separation
of the pair. For certain range of parameters these solutions describe periodic
motion of the centre of mass of the pair 'bouncing off' a finite sized throat
whose minimum size is limited by the D5 branes separation.Comment: 18 pages, 2 figures, PdfLatex: references added.accepted for
publication in JHE | Non Abelian Geometrical Tachyon | non abelian geometrical tachyon | coincident branes branes. kutasov probing brane moving radially tachyonic brane. extend proposal abelian duality promotes valued abelian geometric tachyon parametrization chosen. coincident branes moving determined. analytic simplified broken pair. bouncing sized throat branes pages pdflatex cepted publication | non_dup | [] |
2138889 | 10.1007/JHEP11(2010)064 | We compute the low energy decay rates of near-extremal three(four) charge
black holes in five(four) dimensional N=4 string theory to sub-leading order in
the large charge approximation. This involves studying stringy corrections to
scattering amplitudes of a scalar field off a black hole. We adapt and use
recently developed techniques to compute such amplitudes as near-horizon
quantities. We then compare this with the corresponding calculation in the
microscopic configuration carrying the same charges as the black hole. We find
perfect agreement between the microscopic and macroscopic calculations; in the
cases we study, the zero energy limit of the scattering cross section is equal
to four times the Wald entropy of the black hole.Comment: 32 page | Stringy effects in black hole decay | stringy effects in black hole decay | extremal holes approximation. involves studying stringy amplitudes hole. adapt amplitudes horizon quantities. microscopic carrying charges hole. perfect microscopic macroscopic wald | non_dup | [] |
2109929 | 10.1007/JHEP11(2010)065 | We consider a simplest extension of the Standard Model (SM) through the
incorporation of a real scalar singlet and an additional discrete $Z_2$
symmetry. The model admits the neutral scalar singlet to be stable and thus, a
viable component of dark matter. We explore the parameter space of the model
keeping in view the constraints arise from different dark matter direct
detection experiments through WIMP-nucleon scattering. First of all, we have
utilised the data obtained from CDMS, XENON-10 and XENON-100 collaborations. We
further constraint the parameter space from the DAMA collaboration results
(both with and without channelling) and CoGeNT collaboration results.
Throughout our analysis, the constraint arises due to the observed relic
density of dark matter reported by WMAP experiment, is also incorporated.
Utilising all those constraints, on the model parameter space, we calculate the
event rates and the annual variation of event rates in the context of a Liquid
Argon Detector experiment.Comment: 16 pages, 6 figures ; Text modified, figures modifie | Constraining Scalar Singlet Dark Matter with CDMS, XENON and DAMA and
Prediction for Direct Detection Rates | constraining scalar singlet dark matter with cdms, xenon and dama and prediction for direct detection rates | simplest incorporation singlet symmetry. admits neutral singlet viable matter. explore keeping arise wimp nucleon scattering. utilised cdms xenon xenon collaborations. dama channelling cogent results. arises relic wmap incorporated. utilising argon pages modifie | non_dup | [] |
2156254 | 10.1007/JHEP11(2010)066 | Recently, an interesting work, which reformulates the tunneling framework to
directly produce the Hawking emission spectrum and entropy spectroscopy in the
tunneling picture, has been received a broad attention. However, during the
emission process, most related observations have not incorporated the effects
of back reaction on the background spacetime, whose derivations are therefore
not the desiring results for the real physical process. With this point as a
central motivation, in this paper we suitably adapt the \emph{reformulated}
tunneling framework so that it can well accommodate the effects of back
reaction to produce the Hawking emission spectrum and entropy spectroscopy.
Consequently, we interestingly find that, when back reaction is considered, the
Parikh-Wilczek's outstanding observations that, an isolated radiating black
hole has an unitary-evolving emission spectrum that is \emph{not} precisely
thermal, but is related to the change of the Bekenstein-Hawking entropy, can
also be reproduced in the reformulated tunneling framework, meanwhile the
entropy spectrum has the same form as that without inclusion of back reaction,
which demonstrates the entropy quantum is \emph{independent} of the effects of
back reaction. As our final analysis, we concentrate on the issues of the black
hole information, but \emph{unfortunately} find that, even including the
effects of back reaction and higher-order quantum corrections, such tunneling
formalism can still not provide a mechanism for preserving the black hole
information.Comment: 16 pages, no figure, use JHEP3.cls. to be published in JHE | Back reaction, emission spectrum and entropy spectroscopy | back reaction, emission spectrum and entropy spectroscopy | reformulates tunneling hawking spectroscopy tunneling picture broad attention. incorporated spacetime derivations desiring process. motivation suitably adapt emph reformulated tunneling accommodate hawking spectroscopy. interestingly parikh wilczek outstanding radiating unitary evolving emph precisely bekenstein hawking reproduced reformulated tunneling meanwhile inclusion demonstrates emph reaction. concentrate emph unfortunately tunneling formalism preserving pages jhep .cls. | non_dup | [] |
2145524 | 10.1007/JHEP11(2010)067 | We study the possibility of gauging the Standard Model flavor group. Anomaly
cancellation leads to the addition of fermions whose mass is inversely
proportional to the known fermion masses. In this case all flavor violating
effects turn out to be controlled roughly by the Standard Model Yukawa,
suppressing transitions for the light generations. Due to the inverted
hierarchy the scale of new gauge flavor bosons could be as low as the
electroweak scale without violating any existing bound but accessible at the
Tevatron and the LHC. The mechanism of flavor protection potentially provides
an alternative to Minimal Flavor Violation, with flavor violating effects
suppressed by hierarchy of scales rather than couplings.Comment: 24 pages + appendices; v2) Refs. added and numerical examples
improved. Results unchanged; v3) small typos in appendix B correcte | Low Scale Flavor Gauge Symmetries | low scale flavor gauge symmetries | gauging flavor group. anomaly cancellation fermions inversely fermion masses. flavor violating roughly yukawa suppressing generations. inverted hierarchy flavor bosons electroweak violating accessible tevatron lhc. flavor protection potentially flavor violation flavor violating suppressed hierarchy pages appendices refs. improved. unchanged typos correcte | non_dup | [] |
2148684 | 10.1007/JHEP11(2010)069 | We construct the interaction terms between the world-volume fields of
multiple M2-branes and the 3- and 6-form fields in the context of ABJM theory
with U($N$)$\times$U($N$) gauge symmetry. A consistency check is made in the
simplest case of a single M2-brane, i.e, our construction matches the known
effective action of M2-brane coupled to antisymmetric 3-form field. We show
that when dimensionally reduced, our couplings coincide with the effective
action of D2-branes coupled to R-R 3- and 5-form fields in type IIA string
theory. We also comment on the relation between a coupling with a specific
6-form field configuration and the supersymmetry preserving mass deformation in
ABJM theory.Comment: 30 pages, version to appear in JHE | Interaction between M2-branes and Bulk Form Fields | interaction between m2-branes and bulk form fields | branes abjm symmetry. consistency check simplest brane matches brane antisymmetric field. dimensionally couplings coincide branes theory. comment supersymmetry preserving deformation abjm pages | non_dup | [] |
2143555 | 10.1007/JHEP11(2010)070 | Generic master equations governing the highly-damped quasi-normal frequencies
[QNFs] of one-horizon, two-horizon, and even three-horizon spacetimes can be
obtained through either semi-analytic or monodromy techniques. While many
technical details differ, both between the semi-analytic and monodromy
approaches, and quite often among various authors seeking to apply the
monodromy technique, there is nevertheless widespread agreement regarding the
the general form of the QNF master equations. Within this class of generic
master equations we can establish some rather general results, relating the
existence of "families" of QNFs of the form omega_{a,n} = (offset)_a + i n
(gap) to the question of whether or not certain ratios of parameters are
rational or irrational.Comment: 23 pages; V2: Minor additions, typos fixed. Matches published versio | Generic master equations for quasi-normal frequencies | generic master equations for quasi-normal frequencies | generic master governing damped quasi qnfs horizon horizon horizon spacetimes analytic monodromy techniques. analytic monodromy seeking monodromy nevertheless widespread master equations. generic master establish relating families qnfs omega offset rational pages minor additions typos fixed. matches versio | non_dup | [] |
2123161 | 10.1007/JHEP11(2010)071 | We study a simple five-dimensional extension of the Standard Model,
compactified on a flat line segment in which there propagate Higgs and gauge
bosons of the Standard Model. We impose a Dirichlet boundary condition on the
Higgs field to realize its vacuum expectation value. Since a flat
Nambu-Goldstone zero-mode of the bulk Higgs is eliminated by the Dirichlet
boundary condition, a superposition of the Higgs Kaluza-Klein modes play the
role of the Nambu-Goldstone boson except at the boundaries. We discuss
phenomenology of our model at the LHC, namely the top Yukawa deviation and the
production and decay of the physical Higgs field, as well as the constraints
from the electroweak precision measurements.Comment: 24 pages, 8 figures, title changed, phenomenological consequences
substantially modifie | Phenomenological Aspects of Dirichlet Higgs Model from Extra-Dimension | phenomenological aspects of dirichlet higgs model from extra-dimension | compactified segment propagate bosons model. impose dirichlet realize expectation value. nambu goldstone eliminated dirichlet superposition kaluza klein nambu goldstone boson boundaries. phenomenology yukawa electroweak precision pages title changed phenomenological consequences substantially modifie | non_dup | [] |
2126831 | 10.1007/JHEP11(2010)072 | We determine the form of all timelike supersymmetric solutions of all N
greater or equal than 2, d=4 ungauged supergravities, for N less or equal than
4 coupled to vector supermultiplets, using the $Usp(n+1,n+1)-symmetric
formulation of Andrianopoli, D'Auria and Ferrara and the spinor-bilinears
method, while preserving the global symmetries of the theories all the way. As
previously conjectured in the literature, the supersymmetric solutions are
always associated to a truncation to an N=2 theory that may include
hypermultiplets, although fields which are eliminated in the truncations can
have non-trivial values, as is required by the preservation of the global
symmetry of the theories. The solutions are determined by a number of
independent functions, harmonic in transverse space, which is twice the number
of vector fields of the theory (n+1). The transverse space is flat if an only
if the would-be hyperscalars of the associated N=2 truncation are trivial.Comment: v3: Some changes in the introduction. Version to be published in JHE | All the timelike supersymmetric solutions of all ungauged d=4
supergravities | all the timelike supersymmetric solutions of all ungauged d=4 supergravities | timelike supersymmetric ungauged supergravities supermultiplets formulation andrianopoli auria ferrara spinor bilinears preserving symmetries way. conjectured supersymmetric truncation hypermultiplets eliminated truncations trivial preservation theories. harmonic twice hyperscalars truncation introduction. | non_dup | [] |
2145473 | 10.1007/JHEP11(2010)073 | Scalar leptoquarks, with baryon and lepton number conserving interactions,
could have TeV scale masses, and be produced at colliders or contribute to a
wide variety of rare decays. In pursuit of some insight as to the most
sensitive search channels, We assume that the leptoquark-lepton-quark coupling
can be constructed from the known mass matrices. We estimate the rates for
selected rare processes in three cases: leptoquarks carrying lepton and quark
flavour, leptoquarks with quark flavour only, and unflavoured leptoquarks. We
find that leptoquark decay to top quarks is an interesting search channel.Comment: 17 pages, 2 figures, minor changes and references adde | Minimal Flavour Violation for Leptoquarks | minimal flavour violation for leptoquarks | leptoquarks baryon lepton conserving colliders rare decays. pursuit insight leptoquark lepton matrices. rare leptoquarks carrying lepton flavour leptoquarks flavour unflavoured leptoquarks. leptoquark quarks pages minor adde | non_dup | [] |
2130358 | 10.1007/JHEP11(2010)074 | We present an updated study of the systematic errors in the measurements of
the electroweak boson cross-sections at the LHC for various experimental cuts
for a center of mass energy of 7, 10 and 14 TeV. The size of both electroweak
and NNLO QCD contributions are estimated, together with the systematic error
from the parton distributions. The effects of new versions of the MSTW, CTEQ,
and NNPDF PDFs are considered.Comment: PDFLatex with JHEP3.cls. 22 pages, 43 figures. Version 2 adds the
CT10W PDF set to analysis and updates the final systematic error table and
conclusions, plus several citations and minor wording changes. Version 3 adds
some references on electroweak and mixed QED/QCD corrections. Version 4 adds
more references and acknowledgement | Theoretical Uncertainties in Electroweak Boson Production Cross Sections
at 7, 10, and 14 TeV at the LHC | theoretical uncertainties in electroweak boson production cross sections at 7, 10, and 14 tev at the lhc | updated electroweak boson cuts tev. electroweak nnlo parton distributions. versions mstw cteq nnpdf pdfs pdflatex jhep .cls. pages figures. adds updates citations minor wording changes. adds electroweak corrections. adds acknowledgement | non_dup | [] |
2145087 | 10.1007/JHEP11(2010)075 | We reconsider the flavor problem in the models with two Higgs doublets. By
studying two generation toy models, we look for flavor basis independent
constraints on Yukawa couplings that will give us the mass hierarchy while
keeping all Yukawa couplings of the same order. We then generalize our findings
to the full three generation Standard Model. We find that we need two
constraints on the Yukawa couplings to generate the observed mass hierarchy,
and a slight tuning of Yukawa couplings of order 10%, much less than the
Standard Model. We briefly study how these constraints can be realized, and
show how flavor changing currents are under control for $K-\bar{K}$ mixing in
the near-decoupling limit.Comment: 26 pages, typos are corrected, references are added, the final
versio | The flavor puzzle in multi-Higgs models | the flavor puzzle in multi-higgs models | reconsider flavor doublets. studying look flavor yukawa couplings hierarchy keeping yukawa couplings order. generalize model. yukawa couplings hierarchy slight tuning yukawa couplings model. briefly realized flavor changing currents decoupling pages typos corrected versio | non_dup | [] |
2138117 | 10.1007/JHEP11(2010)076 | We demonstrate that the four and six-point tree-level amplitudes of N=6
superconformal Chern-Simons theory (ABJM) enjoy OSp(6|4) dual superconformal
symmetry if one enlarges the dual superspace to include three additional
Grassmann-even coordinates which correspond to an abelian isometry of CP3. The
inclusion of these coordinates enables us to match the nontrivial dual
superconformal generators with level-one Yangian generators when acting on
on-shell amplitudes. We also discuss some implications of dual conformal
symmetry for loop-level amplitudes.Comment: 32 pages; v3: minor changes, published in JHE | Dual Superconformal Symmetry of N=6 Chern-Simons Theory | dual superconformal symmetry of n=6 chern-simons theory | amplitudes superconformal chern simons abjm enjoy superconformal enlarges superspace grassmann abelian isometry inclusion enables match nontrivial superconformal generators yangian generators acting amplitudes. conformal pages minor | non_dup | [] |
2135135 | 10.1007/JHEP11(2010)077 | The present paper concludes our investigation on the QCD equation of state
with 2+1 staggered flavors and one-link stout improvement. We extend our
previous study [JHEP 0601:089 (2006)] by choosing even finer lattices. Lattices
with $N_t=6,8$ and 10 are used, and the continuum limit is approached by
checking the results at $N_t=12$. A Symanzik improved gauge and a stout-link
improved staggered fermion action is utilized. We use physical quark masses,
that is, for the lightest staggered pions and kaons we fix the $m_\pi/f_K$ and
$m_K/f_K$ ratios to their experimental values. The pressure, the interaction
measure, the energy and entropy density and the speed of sound are presented as
functions of the temperature in the range $100 ...1000 \textmd{MeV}$. We give
estimates for the pion mass dependence and for the contribution of the charm
quark. We compare our data to the equation of state obtained by the "hotQCD"
collaboration.Comment: Minor changes: Figure 1 added; Figure 15, Figure 17 and Table 5
changed. Accepted for publication in JHE | The QCD equation of state with dynamical quarks | the qcd equation of state with dynamical quarks | concludes staggered flavors stout improvement. extend jhep choosing finer lattices. lattices continuum approached checking symanzik stout staggered fermion utilized. lightest staggered pions kaons values. sound textmd pion charm quark. hotqcd minor changed. publication | non_dup | [] |
2138512 | 10.1007/JHEP11(2010)078 | In the very special relativity (VSR) proposal by Cohen and Glashow, it was
pointed out that invariance under HOM(2) is both necessary and sufficient to
explain the null result of the Michelson-Morely experiment. It is the quantum
field theoretic demand of locality, or the requirement of P, T, CP, or CT
invariance, that makes invariance under the Lorentz group a necessity.
Originally it was conjectured that VSR operates at the Planck scale; we propose
that the natural arena for VSR is at energies similar to the standard model,
but in the dark sector. To this end we provide an ab initio spinor
representation invariant under the SIM(2) avatar of VSR and construct a mass
dimension one fermionic quantum field of spin one half. This field turns out to
be a very close sibling of Elko and it exhibits the same striking property of
intrinsic darkness with respect to the standard model fields. In the new
construct, the tension between Elko and Lorentz symmetries is fully resolved.
We thus entertain the possibility that the symmetries underlying the standard
model matter and gauge fields are those of Lorentz, while the event space
underlying the dark matter and the dark gauge fields supports the algebraic
structure underlying VSR.Comment: 19 pages. Section 5 is new. Published version (modulo a footnote, and
a corrected typo | Very special relativity as relativity of dark matter: the Elko
connection | very special relativity as relativity of dark matter: the elko connection | relativity proposal cohen glashow pointed invariance michelson morely experiment. theoretic locality requirement invariance invariance lorentz necessity. originally conjectured operates planck propose arena sector. initio spinor avatar fermionic half. turns sibling elko exhibits striking intrinsic darkness fields. tension elko lorentz symmetries resolved. entertain symmetries lorentz supports algebraic pages. new. modulo footnote corrected typo | non_dup | [] |
2147414 | 10.1007/JHEP11(2010)079 | We derive an exact analytical expression for the one-loop partition function
of a string in AdS_5xS^5 background with world-surface ending on two
anti-parallel lines. All quantum fluctuations are shown to be governed by
integrable, single-gap Lame' operators. The first strong coupling correction to
the quark-antiquark potential, as defined in N=4 SYM, is derived as the sum of
known mathematical constants and a one-dimensional integral representation. Its
full numerical value can be given with arbitrary precision and confirms a
previous result.Comment: 16 pages. Typos corrected, minor change | Quark-antiquark potential in AdS at one loop | quark-antiquark potential in ads at one loop | derive partition ending lines. governed integrable lame operators. antiquark mathematical representation. precision confirms pages. typos corrected minor | non_dup | [] |
2134037 | 10.1007/JHEP11(2010)081 | We present a self-gravitating dyon solution of the Einstein-Yang-Mills-Higgs
equations of motion in asymptotically AdS space. The back reaction of gauge and
Higgs fields on the space-time geometry leads to the metric of an
asymptotically AdS black hole. Using the gauge/gravity correspondence we
analyze relevant properties of the finite temperature quantum field theory
defined on the boundary. In particular we identify an order operator,
characterize a phase transition of the dual theory on the border and also
compute the expectation value of the finite temperature Wilson loop.Comment: 25 pages, 9 figures. Revised version to appear in JHE | Holography and $AdS_4$ self-gravitating dyons | holography and $ads_4$ self-gravitating dyons | gravitating dyon einstein mills asymptotically space. asymptotically hole. correspondence analyze boundary. characterize border expectation wilson pages figures. revised | non_dup | [] |
2147608 | 10.1007/JHEP11(2010)082 | Recently, various possible expressions for the vacuum-to-vacuum superstring
amplitudes has been proposed at genus $g=3,4,5$. To compare the different
proposals, here we will present a careful analysis of the comparison between
the two main technical tools adopted to realize the proposals: the classical
theta constants and the lattice theta series. We compute the relevant Fourier
coefficients in order to relate the two spaces. We will prove the equivalence
up to genus 4. In genus five we will show that the solutions are equivalent
modulo the Schottky form and coincide if we impose the vanishing of the
cosmological constant.Comment: 21 page | Classical theta constants vs. lattice theta series, and super string
partition functions | classical theta constants vs. lattice theta series, and super string partition functions | expressions superstring amplitudes genus proposals careful adopted realize proposals theta theta series. fourier relate spaces. equivalence genus genus modulo schottky coincide impose vanishing cosmological | non_dup | [] |
2138064 | 10.1007/JHEP11(2010)083 | We perform a systematic analysis of generic string flux compactifications,
making use of Exceptional Generalized Geometry (EGG) as an organizing
principle. In particular, we establish the precise map between fluxes, gaugings
of maximal 4d supergravity and EGG, identifying the complete set of gaugings
that admit an uplift to 10d heterotic or type IIB supegravity backgrounds. Our
results reveal a rich structure, involving new deformations of 10d supergravity
backgrounds, such as the RR counterparts of the $\beta$-deformation. These new
deformations are expected to provide the natural extension of the
$\beta$-deformation to full-fledged F-theory backgrounds. Our analysis also
provides some clues on the 10d origin of some of the particularly less
understood gaugings of 4d supergravity. Finally, we derive the explicit
expression for the effective superpotential in arbitrary N = 1 heterotic or
type IIB orientifold compactifications, for all the allowed fluxes.Comment: 58 pages, 6 table | U-dual fluxes and Generalized Geometry | u-dual fluxes and generalized geometry | generic compactifications exceptional organizing principle. establish precise fluxes gaugings maximal supergravity identifying gaugings admit uplift heterotic supegravity backgrounds. reveal involving deformations supergravity backgrounds counterparts beta deformation. deformations beta deformation fledged backgrounds. clues understood gaugings supergravity. derive superpotential heterotic orientifold compactifications pages | non_dup | [] |
2108488 | 10.1007/JHEP11(2010)085 | We consider fermion correlators in non-abelian holographic superconductors.
The spectral function of the fermions exhibits several interesting features
such as support in displaced Dirac cones and an asymmetric distribution of
normal modes. These features are compared to similar ones observed in angle
resolved photoemission experiments on high T_c superconductors. Along the way
we elucidate some properties of p-wave superconductors in AdS_4 and discuss the
construction of SO(4) superconductors.Comment: 49 pages, 11 figure | Fermion correlators in non-abelian holographic superconductors | fermion correlators in non-abelian holographic superconductors | fermion correlators abelian holographic superconductors. fermions exhibits displaced dirac cones asymmetric modes. resolved photoemission superconductors. elucidate superconductors pages | non_dup | [] |
2144202 | 10.1007/JHEP11(2010)086 | We construct an off-shell extension of cubic interaction vertices between
massless bosonic Higher Spin fields on a flat background which can be obtained
from perturbative bosonic string theory. We demonstrate how to construct higher
quartic interaction vertices using a simple particular example. We examine
whether BCFW recursion relations for interacting Higher Spin theories are
applicable. We argue that for several interesting examples such relations
should exist, but consistency of the theories might require that we supplement
Higher Spin field theories with extended and possibly non-local objects.Comment: 34 pages; v2 fixed typos, added acknowledgments and references,
several explanations and corrections in section 6, conclusions unchanged; v3
35 pages, references added, typos fixed, version accepted for publication by
JHE | On the Tensionless Limit of String theory, Off - Shell Higher Spin
Interaction Vertices and BCFW Recursion Relations | on the tensionless limit of string theory, off - shell higher spin interaction vertices and bcfw recursion relations | cubic massless bosonic perturbative bosonic theory. quartic example. examine bcfw recursion interacting applicable. argue consistency supplement possibly pages typos acknowledgments explanations unchanged pages typos publication | non_dup | [] |
2137700 | 10.1007/JHEP11(2010)087 | We calculate the one-loop Yukawa couplings and threshold corrections for
supersymmetric local models of branes at singularities in type IIB string
theory. We compute the corrections coming both from wavefunction and vertex
renormalisation. The former comes in the IR from conventional field theory
running and in the UV from threshold corrections that cause it to run from the
winding scale associated to the full Calabi-Yau volume. The vertex correction
is naively absent as it appears to correspond to superpotential
renormalisation. However, we find that while the Wilsonian superpotential is
not renormalised there is a physical vertex correction in the 1PI action
associated to light particle loops.Comment: 37 pages, 3 figure | One-loop Yukawa Couplings in Local Models | one-loop yukawa couplings in local models | yukawa couplings supersymmetric branes singularities theory. coming wavefunction renormalisation. former comes running winding calabi volume. naively absent superpotential renormalisation. wilsonian superpotential renormalised pages | non_dup | [] |
2127075 | 10.1007/JHEP11(2010)088 | We propose a description of G-fluxes that induce chirality in 4-dimensional
F-theory GUT spectra that is intrinsic to F-theory and does not rely on
Heterotic/F-theory duality. Using this, we describe how to globally extend
fluxes that have been constructed in a semi-local setting and obtain an
F-theoretic formula for computing the chiral spectrum that they induce.
Chirality computations agree with those from the semi-local Higgs bundle
analysis for matter fields that are charged under the GUT-group, and hence with
the standard Heterotic formulae where applicable. Finally, the relation of
G-fluxes to SU(5)_{perp} bundles on the F-theory 4-fold is discussed and used
to motivate a quantization rule that is consistent both with the Higgs bundle
one as well as the Heterotic one when a Heterotic dual exists.Comment: 41 pages + 2 appendices; v2 references added, typo in (2.14)
correcte | A Note on G-Fluxes for F-theory Model Building | a note on g-fluxes for f-theory model building | propose fluxes induce chirality intrinsic rely heterotic duality. globally extend fluxes theoretic chiral induce. chirality computations agree bundle heterotic formulae applicable. fluxes perp bundles motivate quantization bundle heterotic heterotic pages appendices typo correcte | non_dup | [] |
2131808 | 10.1007/JHEP11(2010)089 | We show model-independently that the negative like-sign charge asymmetry
$(-A^b_{s\ell})$ is less than $ 3.16\times 10^{-3}$ when the constraints from
the $B_q-\bar B_q$ mixings and the time-dependent CP asymmetries (CPAs) for
$B_q\to J/\Psi M_q$ with $M_q=K,\phi$ and $q=d,s$ are taken into account.
Although the result is smaller than the measured value by the D{\O}
Collaboration at Fermilab, there is still plenty of room to have new physics,
which is sensitive to new CP violating effects, as the standard model (SM)
prediction is $(2.3_{-0.5}^{+0.6})\times 10^{-4}$. To illustrate the potential
large $|A^{b}_{s\ell}|$, we show the influence of new $SU(2)_L$ singlet exotic
quarks in the vector-like quark model, where the $Z$-mediated flavor changing
neutral currents (FCNCs) are generated at tree level. In particular, we
demonstrate that (a) the like-sign charge asymmetry could be enhanced by a
factor of two in magnitude; (b) the CPA of $\sin2\beta^{J/\Psi \phi}_s$ could
reach to $-15%$; (c) the CPA of $\sin2\beta_{\phi K_S}$ could be higher than
$\sin2\beta_{J/\Psi K_S}$ when $|A^b_{s\ell}|$ is larger than the SM
prediction; and (d) the branching ratio for $B_s\to \mu^+ \mu^-$ could be as
large as $0.6\times 10^{-8}$.Comment: 1+19 pages, 8 figures, typos corrected and references added, version
to appear in JHE | Z-mediated charge and CP asymmetries and FCNCs in $B_{d,s}$ processes | z-mediated charge and cp asymmetries and fcncs in $b_{d,s}$ processes | independently asymmetry mixings asymmetries cpas account. fermilab plenty room violating illustrate singlet exotic quarks flavor changing neutral currents fcncs level. asymmetry beta beta beta branching .comment pages typos corrected | non_dup | [] |
2126418 | 10.1007/JHEP11(2010)090 | We reconsider basic, in the sense of minimal field content, Pati-Salam x
SU(3) family models which make use of the Type I see-saw mechanism to reproduce
the observed mixing and mass spectrum in the neutrino sector. The goal of this
is to achieve the observed baryon asymmetry through the thermal decay of the
lightest right-handed neutrino and at the same time to be consistent with the
expected experimental lepton flavour violation sensitivity. This kind of models
have been previously considered but it was not possible to achieve a
compatibility among all of the ingredients mentioned above. We describe then
how different SU(3) messengers, the heavy fields that decouple and produce the
right form of the Yukawa couplings together with the scalars breaking the SU(3)
symmetry, can lead to different Yukawa couplings. This in turn implies
different consequences for flavour violation couplings and conditions for
realizing the right amount of baryon asymmetry through the decay of the
lightest right-handed neutrino. Also a highlight of the present work is a new
fit of the Yukawa textures traditionally embedded in SU(3) family models.Comment: 26 pages, 5 figures, Some typos correcte | Bridging flavour violation and leptogenesis in SU(3) family models | bridging flavour violation and leptogenesis in su(3) family models | reconsider pati salam reproduce sector. goal baryon asymmetry lightest handed lepton flavour violation sensitivity. kind compatibility ingredients above. messengers decouple yukawa couplings scalars breaking yukawa couplings. consequences flavour violation couplings realizing baryon asymmetry lightest handed neutrino. highlight yukawa textures traditionally embedded pages typos correcte | non_dup | [] |
2141020 | 10.1007/JHEP11(2010)092 | It is known from earlier work of Iqbal, Liu (arXiv:0809.3808) that the
boundary transport coefficients such as electrical conductivity (at vanishing
chemical potential), shear viscosity etc. at low frequency and finite
temperature can be expressed in terms of geometrical quantities evaluated at
the horizon. In the case of electrical conductivity, at zero chemical potential
gauge field fluctuation and metric fluctuation decouples, resulting in a
trivial flow from horizon to boundary. In the presence of chemical potential,
the story becomes complicated due to the fact that gauge field and metric
fluctuation can no longer be decoupled. This results in a nontrivial flow from
horizon to boundary. Though horizon conductivity can be expressed in terms of
geometrical quantities evaluated at the horizon, there exist no such neat
result for electrical conductivity at the boundary. In this paper we propose an
expression for boundary conductivity expressed in terms of geometrical
quantities evaluated at the horizon and thermodynamical quantities. We also
consider the theory at finite cutoff outside the horizon (arXiv:1006.1902) and
give an expression for cutoff dependent electrical conductivity, which
interpolates smoothly between horizon conductivity and boundary conductivity .
Using the results about the electrical conductivity we gain much insight into
the universality of thermal conductivity to viscosity ratio proposed in
arXiv:0912.2719.Comment: An appendix added discussing relation between boundary conductivity
and universal conductivity of stretched horizon, version to be published in
JHE | Universal thermal and electrical conductivity from holography | universal thermal and electrical conductivity from holography | iqbal electrical conductivity vanishing viscosity etc. geometrical quantities horizon. electrical conductivity fluctuation fluctuation decouples trivial horizon boundary. story complicated fluctuation decoupled. nontrivial horizon boundary. horizon conductivity geometrical quantities horizon neat electrical conductivity boundary. propose conductivity geometrical quantities horizon thermodynamical quantities. cutoff horizon cutoff electrical conductivity interpolates smoothly horizon conductivity conductivity electrical conductivity insight universality conductivity viscosity discussing conductivity universal conductivity stretched horizon | non_dup | [] |
2137744 | 10.1007/JHEP11(2010)094 | The graviton 1-loop partition function in Euclidean topologically massive
gravity (TMG) is calculated using heat kernel techniques. The partition
function does not factorize holomorphically, and at the chiral point it has the
structure expected from a logarithmic conformal field theory. This gives strong
evidence for the proposal that the dual conformal field theory to TMG at the
chiral point is indeed logarithmic. We also generalize our results to new
massive gravity.Comment: 19 pages, v2: major revision, considerably stronger conclusions,
added comparison with LCFT partition function, confirmation of LCFT
conjecture, added autho | Graviton 1-loop partition function for 3-dimensional massive gravity | graviton 1-loop partition function for 3-dimensional massive gravity | graviton partition euclidean topologically massive kernel techniques. partition factorize holomorphically chiral logarithmic conformal theory. proposal conformal chiral logarithmic. generalize massive pages revision considerably stronger lcft partition confirmation lcft conjecture autho | non_dup | [] |