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 |
|---|---|---|---|---|---|---|---|
2135025 | 10.1007/JHEP10(2010)039 | We study a self-bound dense object in the hard wall model. We consider a
spherically symmetric dense object which is characterized by its radial density
distribution and non-uniform but spherically symmetric chiral condensate. For
this we analytically solve the partial differential equations in the hard wall
model and read off the radial coordinate dependence of the density and chiral
condensate according to the AdS/CFT correspondence. We then attempt to describe
nucleon density profiles of a few nuclei within our framework and observe that
the confinement scale changes from a free nucleon to a nucleus. We briefly
discuss how to include the effect of higher dimensional operator into our
study. We finally comment on possible extensions of our work.Comment: 17 pages, 5 figures, figures replaced, minor revision, to appear in
JHE | Self-bound dense objects in holographic QCD | self-bound dense objects in holographic qcd | dense model. spherically dense spherically chiral condensate. analytically solve read coordinate chiral condensate correspondence. attempt nucleon nuclei confinement nucleon nucleus. briefly study. comment extensions pages replaced minor revision | non_dup | [] |
2100541 | 10.1007/JHEP10(2010)041 | We revisit General Gauge Mediation (GGM) in light of the supersymmetric
(linear) sigma model by utilizing the current superfield. The current
superfield in the GGM is identified with supersymmetric extension of the vector
symmetry current of the sigma model while spontaneous breakdown of
supersymmetry in the GGM corresponds to soft breakdown of the axial vector
symmetry of the sigma model. We first derive the current superfield from the
supersymmetric linear sigma model and then compute 2-point functions of the
current superfield using the (anti-)commutation relations of the messenger
component fields. After the global symmetry are weakly gauged, the 2-point
functions of the current superfield are identified with a part of the 2-point
functions of the associated vector superfield. We renormalize them by
dimensional regularization and show that physical gaugino and sfermion masses
of the MSSM are expressed in terms of the wavefunction renormalization
constants of the component fields of the vector superfield.Comment: 25 pages, 12 figure | Renormalization in General Gauge Mediation | renormalization in general gauge mediation | revisit mediation supersymmetric sigma utilizing superfield. superfield supersymmetric sigma spontaneous breakdown supersymmetry breakdown axial sigma model. derive superfield supersymmetric sigma superfield commutation messenger fields. weakly gauged superfield superfield. renormalize regularization gaugino sfermion mssm wavefunction renormalization pages | non_dup | [] |
2129691 | 10.1007/JHEP10(2010)042 | We analyze the asymptotic solutions of Chiral Gravity (Topologically Massive
Gravity at \mu l = 1 with Brown-Henneaux boundary conditions) focusing on
non-Einstein metrics. A class of such solutions admits curvature singularities
in the interior which are reflected as singularities or infinite bulk energy of
the corresponding linear solutions. A non-linear solution is found exactly. The
back-reaction induces a repulsion of geodesics and a shielding of the
singularity by an event horizon but also introduces closed timelike curves.Comment: 11 pages, 3 figures. v2: references and comments on linear stability
(Sect.2) adde | Non-Einstein geometries in Chiral Gravity | non-einstein geometries in chiral gravity | analyze asymptotic chiral topologically massive brown henneaux focusing einstein metrics. admits curvature singularities interior reflected singularities infinite solutions. exactly. induces repulsion geodesics shielding singularity horizon introduces timelike pages figures. comments sect. adde | non_dup | [] |
2028419 | 10.1007/JHEP10(2010)043 | We study the symmetries of the N=1 exactly marginal deformations of N=4 Super
Yang-Mills theory. For generic values of the parameters, these deformations are
known to break the SU(3) part of the R-symmetry group down to a discrete
subgroup. However, a closer look from the perspective of quantum groups reveals
that the Lagrangian is in fact invariant under a certain Hopf algebra which is
a non-standard quantum deformation of the algebra of functions on SU(3). Our
discussion is motivated by the desire to better understand why these theories
have significant differences from N=4 SYM regarding the planar integrability
(or rather lack thereof) of the spin chains encoding their spectrum. However,
our construction works at the level of the classical Lagrangian, without
relying on the language of spin chains. Our approach might eventually provide a
better understanding of the finiteness properties of these theories as well as
help in the construction of their AdS/CFT duals.Comment: 1+40 pages. v2: minor clarifications and references added. v3: Added
an appendix, fixed minor typo | Quantum Symmetries and Marginal Deformations | quantum symmetries and marginal deformations | symmetries marginal deformations super mills theory. generic deformations break subgroup. closer look perspective reveals lagrangian hopf deformation motivated desire planar integrability thereof chains encoding spectrum. lagrangian relying chains. eventually finiteness pages. minor clarifications added. minor typo | non_dup | [] |
2112352 | 10.1007/JHEP10(2010)045 | We study small charged black holes in global AdS spacetime in the presence of
a charged massless minimally coupled scalar field. In a certain parameter range
these black holes suffer from well known superradiant instabilities. We
demonstrate that the end point of the resultant tachyon condensation process is
a hairy black hole which we construct analytically in a perturbative expansion
in the black hole radius. At leading order our solution is a small undeformed
RNAdS black hole immersed into a charged scalar condensate that fills the AdS
`box'. These hairy black hole solutions appear in a two parameter family
labelled by their mass and charge. Their mass is bounded from below by a
function of their charge; at the lower bound a hairy black hole reduces to a
regular horizon free soliton which can also be thought of as a nonlinear Bose
condensate. We compute the microcanonical phase diagram of our system at small
mass, and demonstrate that it exhibits a second order `phase transition'
between the RNAdS black hole and the hairy black hole phases.Comment: 68+1 pages, 18 figures, JHEP format. v2 : small typos corrected and a
reference adde | Small Hairy Black Holes in Global AdS Spacetime | small hairy black holes in global ads spacetime | holes spacetime massless minimally field. holes suffer superradiant instabilities. resultant tachyon condensation hairy analytically perturbative radius. undeformed rnads immersed condensate fills hairy labelled charge. hairy reduces horizon soliton thought bose condensate. microcanonical exhibits rnads hairy pages jhep format. typos corrected adde | non_dup | [] |
2112989 | 10.1007/JHEP10(2010)046 | A simple covariant formalism to describe flavor and CP violation in the
left-handed quark sector in a model independent way is provided. The
introduction of a covariant basis, which makes the standard model approximate
symmetry structure manifest, leads to a physical and transparent picture of
flavor conversion processes. Our method is particularly useful to derive robust
bounds on models with arbitrary mechanisms of alignment. Known constraints on
flavor violation in the K and D systems are reproduced in a straightforward
manner. Assumptions-free limits, based on top flavor violation at the LHC, are
then obtained. In the absence of signal, with 100 fb^{-1} of data, the LHC will
exclude weakly coupled (strongly coupled) new physics up to a scale of 0.6 TeV
(7.6 TeV), while at present no general constraint can be set related to Delta
t=1 processes. LHC data will constrain Delta F=2 contributions via same-sign
tops signal, with a model independent exclusion region of 0.08 TeV (1.0 TeV).
However, in this case, stronger bounds are found from the study of CP violation
in D-bar D mixing with a scale of 0.57 TeV (7.2 TeV). In addition, we apply our
analysis to models of supersymmetry and warped extra dimension. The minimal
flavor violation framework is also discussed, where the formalism allows to
distinguish between the linear and generic non-linear limits within this class
of models.Comment: 24 pages, 6 figures. Some corrections and clarifications; references
added. Matches published versio | Covariant Description of Flavor Conversion in the LHC Era | covariant description of flavor conversion in the lhc era | covariant formalism flavor violation handed provided. covariant approximate manifest transparent picture flavor conversion processes. derive robust bounds alignment. flavor violation reproduced straightforward manner. assumptions flavor violation obtained. exclude weakly delta processes. constrain delta tops exclusion stronger bounds violation supersymmetry warped extra dimension. flavor violation formalism distinguish generic pages figures. clarifications added. matches versio | non_dup | [] |
2121285 | 10.1007/JHEP10(2010)048 | We develop the thermodynamics of field theories characterized by non-local
propagators. We analyze the partition function and main thermodynamic
properties arising from perturbative thermal loops. We focus on the p-adic
models associated with the tachyon phenomenology in string theories. We
reproduce well known features of these theories, but also obtain many new
results. In particular, we explain how to maintain consistency of such
non-local theories by avoiding the appearance of ghosts at finite temperature.
As a consequence of this fact, the vacuum energy in p-adic theories becomes
positive. It is also hierarchically suppressed, and we explore the parameter
space where it is consistent with the observed value of the cosmological
constant.Comment: 34 pages, 11 figure | Thermodynamics and Cosmological Constant of Non-Local Field Theories
from p-Adic Strings | thermodynamics and cosmological constant of non-local field theories from p-adic strings | thermodynamics propagators. analyze partition thermodynamic arising perturbative loops. adic tachyon phenomenology theories. reproduce results. maintain consistency avoiding appearance ghosts temperature. adic positive. hierarchically suppressed explore cosmological pages | non_dup | [] |
2129679 | 10.1007/JHEP10(2010)049 | We analyze the constraints imposed by experimental upper limits on electric
dipole moments (EDMs) within the Maximally CP- and Minimally Flavour-Violating
(MCPMFV) version of the MSSM. Since the MCPMFV scenario has 6 non-standard
CP-violating phases, in addition to the CP-odd QCD vacuum phase \theta_QCD,
cancellations may occur among the CP-violating contributions to the three
measured EDMs, those of the Thallium, neutron and Mercury, leaving open the
possibility of relatively large values of the other CP-violating observables.
We develop a novel geometric method that uses the small-phase approximation as
a starting point, takes the existing EDM constraints into account, and enables
us to find maximal values of other CP-violating observables, such as the EDMs
of the Deuteron and muon, the CP-violating asymmetry in b --> s \gamma decay,
and the B_s mixing phase. We apply this geometric method to provide upper
limits on these observables within specific benchmark supersymmetric scenarios,
including extensions that allow for a non-zero \theta_QCD.Comment: 34 pages, 16 eps figures, to appear in JHE | A Geometric Approach to CP Violation: Applications to the MCPMFV SUSY
Model | a geometric approach to cp violation: applications to the mcpmfv susy model | analyze imposed dipole moments edms maximally minimally flavour violating mcpmfv mssm. mcpmfv violating theta cancellations violating edms thallium neutron mercury leaving violating observables. geometric enables maximal violating observables edms deuteron muon violating asymmetry gamma phase. geometric observables benchmark supersymmetric scenarios extensions pages | non_dup | [] |
2116650 | 10.1007/JHEP10(2010)050 | As Lie algebras of compact connected Lie groups, semisimple Lie algebras have
wide applications in the description of continuous symmetries of physical
systems. Mathematically, semisimple Lie algebra admits a Cartan-Weyl basis of
generators which consists of a Cartan subalgebra of mutually commuting
generators H_I and a number of step generators E^\alpha that are characterized
by a root space of non-degenerate one-forms \alpha. This simple decomposition
in terms of the root space allows for a complete classification of semisimple
Lie algebras. In this paper, we introduce the analogous concept of a
Cartan-Weyl Lie 3-algebra. We analyze their structure and obtain a complete
classification of them. Many known examples of metric Lie 3-algebras (e.g. the
Lorentzian 3-algebras) are special cases of the Cartan-Weyl 3-algebras. Due to
their elegant and simple structure, we speculate that Cartan-Weyl 3-algebras
may be useful for describing some kinds of generalized symmetries. As an
application, we consider their use in the Bagger-Lambert-Gustavsson (BLG)
theory.Comment: LaTeX. 34 pages.v2. deleted some distracting paragraphs in the
introduction to bring more out the main results of the paper. typos corrected
and references adde | Cartan-Weyl 3-algebras and the BLG Theory I: Classification of
Cartan-Weyl 3-algebras | cartan-weyl 3-algebras and the blg theory i: classification of cartan-weyl 3-algebras | algebras semisimple algebras symmetries systems. mathematically semisimple admits cartan weyl generators cartan subalgebra mutually commuting generators generators alpha degenerate alpha. decomposition semisimple algebras. analogous cartan weyl algebra. analyze them. algebras e.g. lorentzian algebras cartan weyl algebras. elegant speculate cartan weyl algebras describing kinds symmetries. bagger lambert gustavsson latex. pages.v deleted distracting paragraphs bring paper. typos corrected adde | non_dup | [] |
2143065 | 10.1007/JHEP10(2010)051 | The first string excited state can be observed as a resonance in dijet
invariant mass distributions at the LHC, if the scenario of low-scale string
with large extra dimensions is realized. A distinguished property of the dijet
resonance by string excited states from that the other "new physics" is that
many almost degenerate states with various spin compose a single resonance
structure. It is examined that how we can obtain evidences of low-scale string
models through the analysis of angular distributions of dijet events at the
LHC. Some string resonance states of color singlet can obtain large mass shifts
through the open string one-loop effect, or through the mixing with closed
string states, and the shape of resonance structure can be distorted. Although
the distortion is not very large (10% for the mass squared), it might be able
to observe the effect at the LHC, if gluon jets and quark jets could be
distinguished in a certain level of efficiency.Comment: 12 pages, 8 figure | A closer look at string resonances in dijet events at the LHC | a closer look at string resonances in dijet events at the lhc | excited dijet extra realized. distinguished dijet excited degenerate compose structure. evidences dijet lhc. singlet shifts distorted. distortion squared gluon jets jets distinguished pages | non_dup | [] |
2121727 | 10.1007/JHEP10(2010)053 | One or more new heavy resonances may be discovered in experiments at the CERN
Large Hadron Collider. In order to determine if such a resonance is the
long-awaited Higgs boson, it is essential to pin down its spin, CP, and
electroweak quantum numbers. Here we describe how to determine what role a
newly-discovered neutral CP-even scalar plays in electroweak symmetry breaking,
by measuring its relative decay rates into pairs of electroweak vector bosons:
WW, ZZ, \gamma\gamma, and Z\gamma. With the data-driven assumption that
electroweak symmetry breaking respects a remnant custodial symmetry, we perform
a general analysis with operators up to dimension five. Remarkably, only three
pure cases and one nontrivial mixed case need to be disambiguated, which can
always be done if all four decay modes to electroweak vector bosons can be
observed or constrained. We exhibit interesting special cases of Higgs
look-alikes with nonstandard decay patterns, including a very suppressed
branching to WW or very enhanced branchings to \gamma\gamma and Z\gamma. Even
if two vector boson branching fractions conform to Standard Model expectations
for a Higgs doublet, measurements of the other two decay modes could unmask a
Higgs imposter.Comment: 23 pages, two figures; v2: minor revision and version to appear in
JHE | Revealing the electroweak properties of a new scalar resonance | revealing the electroweak properties of a new scalar resonance | resonances discovered cern hadron collider. awaited boson electroweak numbers. newly discovered neutral plays electroweak breaking measuring electroweak bosons gamma gamma gamma. electroweak breaking respects remnant custodial five. remarkably nontrivial disambiguated electroweak bosons constrained. exhibit look alikes nonstandard suppressed branching branchings gamma gamma gamma. boson branching fractions conform expectations doublet unmask pages minor revision | non_dup | [] |
2137847 | 10.1007/JHEP10(2010)054 | We consider a topological quantum mechanics described by a phase space path
integral and study the 1-dimensional analog for the path integral
representation of the Kontsevich formula. We see that the naive bosonic
integral possesses divergences, that it is even naively non-invariant and thus
is ill-defined. We then consider a super-extension of the theory which
eliminates the divergences and makes the theory naively invariant. This
super-extension is equivalent to the correct choice of measure and was
discussed in the literature. We then investigate the behavior of this extended
theory under diffeomorphisms of the extended phase space and despite of its
naive invariance find out that the theory possesses anomaly under nonlinear
diffeomorphisms. We localize the origin of the anomaly and calculate the lowest
nontrivial anomalous contribution.Comment: 36 page | Violation of the phase space general covariance as a diffeomorphism
anomaly in quantum mechanics | violation of the phase space general covariance as a diffeomorphism anomaly in quantum mechanics | topological mechanics analog kontsevich formula. naive bosonic possesses divergences naively defined. super eliminates divergences naively invariant. super literature. diffeomorphisms naive invariance possesses anomaly diffeomorphisms. localize anomaly nontrivial anomalous | non_dup | [] |
2135003 | 10.1007/JHEP10(2010)055 | We study deep inelastic scattering for vector and axial vector mesons in the
holographic D4-D8 brane model. We consider tree level contributions with one
particle in the final hadronic state. We obtain the unpolarized structure
functions F1 and F2 for the rho and a1 mesons for q2 < 80 GeV2 and 0.2 < x < 1.
We find that the ratio F2/(2xF1) is approximately equal to one for some ranges
of x and q2, satisfying the Callan-Gross relation.Comment: 15 pages, 4 tables, 8 figures. V2: we added explanations about
Figures 3 and 4. Results unchange | Deep inelastic scattering for vector mesons in holographic D4-D8 model | deep inelastic scattering for vector mesons in holographic d4-d8 model | inelastic axial mesons holographic brane model. hadronic state. unpolarized mesons ranges satisfying callan gross pages tables figures. explanations unchange | non_dup | [] |
2126590 | 10.1007/JHEP10(2010)057 | Making use of toric geometry we construct a class of global F-theory GUT
models. The base manifolds are blowups of Fano threefolds and the Calabi-Yau
fourfold is a complete intersection of two hypersurfaces. We identify possible
GUT divisors and construct SO(10) models on them using the spectral cover
construction. We use a split spectral cover to generate chiral matter on the 10
curves in order to get more degrees of freedom in phenomenology. We use abelian
flux to break SO(10) to SU(5)\times U(1) which is interpreted as a flipped
SU(5) model. With the GUT Higgses in the SU(5)\times U(1) model it is possible
to further break the gauge symmetry to the Standard Model. We present several
phenomenologically attractive examples in detail.Comment: 58 pages, modified models, added references, corrected typo | Global SO(10) F-theory GUTs | global so(10) f-theory guts | toric models. manifolds blowups fano threefolds calabi fourfold intersection hypersurfaces. divisors cover construction. split cover chiral freedom phenomenology. abelian break interpreted flipped model. higgses break model. phenomenologically attractive pages corrected typo | non_dup | [] |
2124930 | 10.1007/JHEP10(2010)058 | Using gauge/gravity duality techniques, we discuss the sound-channel retarded
correlators of vector and tensor conserved currents in a class of
$(2+1)$-dimensional strongly-coupled field theories at zero temperature and
finite charge density, assumed to be holographically dual to the extremal
Reissner-Nordstr\"{o}m AdS$_4$ black hole. Using a combination of analytical
and numerical methods, we determine the quasinormal mode spectrum at finite
momentum for the coupled gravitational and electromagnetic perturbations, and
discuss the appropriate choice of gauge-invariant variables (master fields) in
order for the black hole quasinormal frequencies to reproduce the field theory
spectrum. We discuss the role of the near horizon AdS$_{2}$ geometry in
determining the low-frequency behavior of retarded correlators in the boundary
theory, and comment on the emergence of criticality in the IR. In addition, we
establish the existence of a sound mode at zero temperature and compute the
speed of sound and sound attenuation constant numerically, obtaining a result
consistent with the expectations from the zero temperature limit of
hydrodynamics. The dispersion relation of higher resonances is also
investigated.Comment: 36 pages, 15 figures, PDFLaTeX; v2, corrected typos and figure
caption | Holography and the sound of criticality | holography and the sound of criticality | duality sound retarded correlators conserved currents holographically extremal reissner nordstr hole. quasinormal gravitational electromagnetic perturbations master quasinormal reproduce spectrum. horizon determining retarded correlators comment emergence criticality establish sound sound sound attenuation numerically obtaining expectations hydrodynamics. resonances pages pdflatex corrected typos caption | non_dup | [] |
2106411 | 10.1007/JHEP10(2010)060 | We have investigated the resonant production of a stop at the Large Hadron
Collider, driven by baryon number violating interactions in supersymmetry. We
work in the framework of minimal supergravity models with the lightest
neutralino being the lightest supersymmetric particle which decays within the
detector. We look at various dilepton and trilepton final states, with or
without b-tags. A detailed background simulation is performed, and all possible
decay modes of the lighter stop are taken into account. We find that higher
stop masses are sometimes easier to probe, through the decay of the stop into
the third or fourth neutralino and their subsequent cascades. We also comment
on the detectability of such signals during the 7 TeV run, where, as expected,
only relatively light stops can be probed. Our conclusion is that the resonant
process may be probed, at both 10 and 14 TeV, with the R-parity violating
coupling {\lambda}"_{312} as low as 0.05, for a stop mass of about 1 TeV. The
possibility of distinguishing between resonant stop production and
pair-production is also discussed.Comment: 20 pages, 4 figures, 6 tables; Version accepted by JHE | R-parity violating resonant stop production at the Large Hadron Collider | r-parity violating resonant stop production at the large hadron collider | resonant stop hadron collider baryon violating supersymmetry. supergravity lightest neutralino lightest supersymmetric decays detector. look dilepton trilepton tags. lighter stop account. stop sometimes easier stop fourth neutralino cascades. comment detectability stops probed. resonant probed parity violating lambda stop tev. distinguishing resonant stop pages tables | non_dup | [] |
2137562 | 10.1007/JHEP10(2010)061 | Supersymmetric extensions of the Standard Model with small R-parity and
lepton number violating couplings are naturally consistent with primordial
nucleosynthesis, thermal leptogenesis and gravitino dark matter. We consider
supergravity models with universal boundary conditions at the grand unification
scale, and scalar tau-lepton or bino-like neutralino as next-to-lightest
superparticle (NLSP). Recent Fermi-LAT data on the isotropic diffuse gamma-ray
flux yield a lower bound on the gravitino lifetime. Comparing two-body
gravitino and neutralino decays we find a lower bound on a neutralino NLSP
decay length, $c \tau_{\chi^0_1} \gsim 30 cm$. Together with gravitino and
neutralino masses one obtains a microscopic determination of the Planck mass.
For a stau-NLSP there exists no model-independent lower bound on the decay
length. Here the strongest bound comes from the requirement that the
cosmological baryon asymmetry is not washed out, which yields $c
\tau_{\tilde\tau_1} \gsim 4 mm$. However, without fine-tuning of parameters,
one finds much larger decay lengths. For typical masses, $m_{3/2} \sim 100 GeV$
and $m_{NLSP} \sim 150 GeV$, the discovery of a photon line with an intensity
close to the Fermi-LAT limit would imply a decay length $c\tau_{NLSP}$ of
several hundred meters, which can be measured at the LHC.Comment: 30 pages, 8 figures; v2: published version, reference adde | Broken R-Parity in the Sky and at the LHC | broken r-parity in the sky and at the lhc | supersymmetric extensions parity lepton violating couplings naturally primordial nucleosynthesis leptogenesis gravitino matter. supergravity universal grand unification lepton bino neutralino lightest superparticle nlsp fermi isotropic diffuse gamma gravitino lifetime. gravitino neutralino decays neutralino nlsp gsim gravitino neutralino obtains microscopic planck mass. stau nlsp length. strongest comes requirement cosmological baryon asymmetry washed tilde gsim fine tuning finds lengths. nlsp discovery fermi imply nlsp hundred meters pages adde | non_dup | [] |
2141854 | 10.1007/JHEP10(2010)062 | It has recently been conjectured that the elliptic genus of K3 can be written
in terms of dimensions of Mathieu group M24 representations. Some further
evidence for this idea was subsequently found by studying the twining genera
that are obtained from the elliptic genus upon replacing dimensions of Mathieu
group representations by their characters. In this paper we find explicit
formulae for all (remaining) twining genera by making an educated guess for
their general modular properties. This allows us to identify the decomposition
of all expansion coefficients in terms of dimensions of M24-representations.
For the first 500 coefficients we verify that the multiplicities with which
these representations appear are indeed all non-negative integers. This
represents very compelling evidence in favour of the conjecture.Comment: 23 pages; an error corrected, references update | Mathieu Moonshine in the elliptic genus of K3 | mathieu moonshine in the elliptic genus of k3 | conjectured elliptic genus mathieu representations. subsequently studying twining genera elliptic genus replacing mathieu representations characters. formulae twining genera educated guess modular properties. decomposition representations. verify multiplicities representations integers. compelling favour pages corrected update | non_dup | [] |
2114085 | 10.1007/JHEP10(2010)063 | We consider a holographic description of a system of strongly coupled
fermions in 2+1 dimensions based on a D7-brane probe in the background of
D3-branes, and construct stable embeddings by turning on worldvolume fluxes. We
study the system at finite temperature and charge density, and in the presence
of a background magnetic field. We show that Minkowski-like embeddings that
terminate above the horizon describe a family of quantum Hall states with
filling fractions that are parameterized by a single discrete parameter. The
quantization of the Hall conductivity is a direct consequence of the
topological quantization of the fluxes. When the magnetic field is varied
relative to the charge density away from these discrete filling fractions, the
embeddings deform continuously into black-hole-like embeddings that enter the
horizon and that describe metallic states. We also study the thermodynamics of
this system and show that there is a first order phase transition at a critical
temperature from the quantum Hall state to the metallic state.Comment: v2: 27 pages, 12 figures. There is a major revision in the
quantitative analysis. The qualitative results and conclusions are unchanged,
with one exception: we show that the quantum Hall state embeddings, which
exist for discrete values of the filling fraction, deform continuously into
metallic state embeddings away from these filling fraction | Quantum Hall Effect in a Holographic Model | quantum hall effect in a holographic model | holographic fermions brane branes embeddings turning worldvolume fluxes. field. minkowski embeddings terminate horizon hall filling fractions parameterized parameter. quantization hall conductivity topological quantization fluxes. varied away filling fractions embeddings deform continuously embeddings enter horizon metallic states. thermodynamics hall metallic pages figures. revision analysis. qualitative unchanged exception hall embeddings filling deform continuously metallic embeddings away filling | non_dup | [] |
2137348 | 10.1007/JHEP10(2010)065 | The structure of stringy quantum corrections to four-dimensional effective
theories is particularly interesting for string phenomenology and attempts to
stabilize moduli. We consider the heterotic string compactified on a Calabi-Yau
space. For this case, we compute the leading corrections to the kinetic terms
of moduli fields. The structure of these corrections is largely dictated by the
underlying higher-dimensional extended supersymmetry. We find corrections
generically of order (alpha')^2 rather than of order (alpha')^3 found in type
II compactifications or heterotic compactifications with the standard
embedding. We explore the implications of these corrections for breaking
no-scale structure.Comment: 33 pages, LaTeX; modified section | The Leading Quantum Corrections to Stringy Kahler Potentials | the leading quantum corrections to stringy kahler potentials | stringy phenomenology attempts stabilize moduli. heterotic compactified calabi space. moduli fields. largely dictated supersymmetry. generically alpha alpha compactifications heterotic compactifications embedding. explore breaking pages latex | non_dup | [] |
2131167 | 10.1007/JHEP10(2010)067 | We investigate the collider signatures of heavy, long-lived, neutral
particles that decay to charged particles plus missing energy. Specifically, we
focus on the case of a neutralino NLSP decaying to Z and gravitino within the
context of General Gauge Mediation. We show that a combination of searches
using the inner detector and the muon spectrometer yields a wide range of
potential early LHC discoveries for NLSP lifetimes ranging from 10^(-1)-10^5
mm. We further show that events from Z(l+l-) can be used for detailed kinematic
reconstruction, leading to accurate determinations of the neutralino mass and
lifetime. In particular, we examine the prospects for detailed event study at
ATLAS using the ECAL (making use of its timing and pointing capabilities)
together with the TRT, or using the muon spectrometer alone. Finally, we also
demonstrate that there is a region in parameter space where the Tevatron could
potentially discover new physics in the delayed Z(l+l-)+MET channel. While our
discussion centers on gauge mediation, many of the results apply to any
scenario with a long-lived neutral particle decaying to charged particles.Comment: 31 pages, 12 figure | Long-Lived Neutralino NLSPs | long-lived neutralino nlsps | collider signatures lived neutral missing energy. neutralino nlsp decaying gravitino mediation. searches muon spectrometer discoveries nlsp lifetimes ranging kinematic reconstruction determinations neutralino lifetime. examine prospects atlas ecal timing pointing capabilities muon spectrometer alone. tevatron potentially discover delayed channel. centers mediation lived neutral decaying pages | non_dup | [] |
2132072 | 10.1007/JHEP10(2010)068 | We study R-charge transport in a wide class of strongly-coupled
supersymmetric plasmas at finite temperature with 't Hooft coupling
corrections. To achieve this, we use the gauge/string duality and include the
full set of order(\alpha'^3) corrections to the supergravity backgrounds given
at zeroth order by the direct product of the AdS-Schwarzschild black hole with
a five-dimensional compact Einstein manifold. On general grounds, the reduction
leads to a large number of higher derivative operators, which we reduce using
the symmetries of the solution. We are left with a universal set of operators
whose coefficients can in principle be fixed by carrying out an explicit
compactification. We apply our results to the computation of the R-charge
conductivity of the supersymmetric plasma at finite yet strong coupling.Comment: 23 page | Towards 't Hooft parameter corrections to charge transport in
strongly-coupled plasma | towards 't hooft parameter corrections to charge transport in strongly-coupled plasma | supersymmetric plasmas hooft corrections. duality alpha supergravity backgrounds zeroth schwarzschild einstein manifold. grounds symmetries solution. universal carrying compactification. conductivity supersymmetric | non_dup | [] |
2087603 | 10.1007/JHEP10(2010)069 | In this paper, we consider a de Sitter thick brane model in a pure geometric
Weyl integrable five-dimensional space-time, which is a generalization of
Riemann geometry and is invariant under a so-called Weyl rescaling. We find a
solution of this model via performing a conformal transformation to map the
Weylian structure into a familiar Riemannian one with a conformal metric. The
metric perturbations of the model are discussed. For gravitational
perturbation, we get the effective modified P$\ddot{\text{o}}$schl-Teller
potential in corresponding Schr$\ddot{\text{o}}$dinger equation for
Kaluza-Klein (KK) modes of the graviton. There is only one bound state, which
is a normalizable massless zero mode and represents a stable 4-dimensional
graviton. Furthermore, there exists a mass gap between the massless mode and
continuous KK modes. We also find that the model is stable under the scalar
perturbation in the metric. The correction to the Newtonian potential on the
brane is proportional to $e^{-3 r \beta/2}/r^2$, where $\beta$ is the de Sitter
parameter of the brane. This is very different from the correction caused by a
volcano-like effective potential.Comment: 24 pages, 13 figures, published versio | de Sitter Thick Brane Solution in Weyl Geometry | de sitter thick brane solution in weyl geometry | sitter thick brane geometric weyl integrable generalization riemann weyl rescaling. performing conformal weylian familiar riemannian conformal metric. perturbations discussed. gravitational perturbation ddot schl teller schr ddot dinger kaluza klein graviton. normalizable massless graviton. massless modes. perturbation metric. newtonian brane beta beta sitter brane. volcano pages versio | non_dup | [] |
2139180 | 10.1007/JHEP10(2010)070 | We demonstrate that an Erler-Schnabl type solution in cubic string field
theory can be naturally interpreted as a gauge invariant regularization of an
identity based solution. We consider a solution which interpolates between an
identity based solution and ordinary Erler-Schnabl one. Two gauge invariant
quantities, the classical action and the closed string tadpole, are evaluated
for finite value of the gauge parameter. It is explicitly checked that both of
them are independent of the gauge parameter.Comment: 9 pages, minor typos corrected and references adde | Regularization of identity based solution in string field theory | regularization of identity based solution in string field theory | erler schnabl cubic naturally interpreted regularization solution. interpolates ordinary erler schnabl one. quantities tadpole parameter. explicitly checked pages minor typos corrected adde | non_dup | [] |
2125300 | 10.1007/JHEP10(2010)071 | In this note, we use techniques from integrable systems to study relations
between gauge theories. The Gauge/Bethe correspondence, introduced by Nekrasov
and Shatashvili, identifies the supersymmetric ground states of an N=(2,2)
supersymmetric gauge theory in two dimensions with the Bethe states of a
quantum integrable system. We make use of this correspondence to relate three
different quiver gauge theories which correspond to three different
formulations of the Bethe equations of an integrable spin chain called the tJ
model.Comment: 30 pages, published in JHEP. LaTeX problem correcte | Relating Gauge Theories via Gauge/Bethe Correspondence | relating gauge theories via gauge/bethe correspondence | integrable theories. bethe correspondence nekrasov shatashvili identifies supersymmetric supersymmetric bethe integrable system. correspondence relate quiver formulations bethe integrable pages jhep. latex correcte | non_dup | [] |
2156820 | 10.1007/JHEP10(2010)074 | We show that extremal Kerr-Bolt spacetimes have a hidden conformal symmetry.
In this regard, we consider the wave equation of a massless scalar field
propagating in extremal Kerr-Bolt spacetimes and find in the "near region", the
wave equation in extremal limit can be written in terms of the $SL(2,R)$
quadratic Casimir. Moreover, we obtain the microscopic entropy of the extremal
Kerr-Bolt spacetimes also we calculate the correlation function of a
near-region scalar field and find perfect agreement with the dual 2D CFT.Comment: 13 page | Hidden Conformal Symmetry of Extremal Kerr-Bolt Spacetimes | hidden conformal symmetry of extremal kerr-bolt spacetimes | extremal kerr bolt spacetimes hidden conformal symmetry. regard massless propagating extremal kerr bolt spacetimes extremal quadratic casimir. microscopic extremal kerr bolt spacetimes perfect | non_dup | [] |
2138163 | 10.1007/JHEP10(2010)075 | We examine the consequences of recent developments on Fayet-Iliopoulos (FI)
terms for D-term inflationary models. There is currently no known way to couple
constant FI terms to supergravity consistently; only field-dependent FI terms
are allowed. These are natural in string theory and we argue that the FI term
in D3/D7 inflation turns out to be of this type, corresponding to a
pseudo-anomalous U(1). T he anomaly is canceled by the Green-Schwarz mechanism
in 4 dimensions. Inflation proceeds as usual, except that the scale is set by
the GS parameter. Cosmic strings resulting from a pseudo-anomalous U(1) have
potentially interesting characteristics. Originally expected to be global, they
turn out to be local in the string theory context and can support currents. We
outline the nature of these strings, discuss bounds on their formation, and
summarize resulting cosmological consequences.Comment: 10 pages; minor changes to match published versio | Cosmic strings from pseudo-anomalous Fayet-Iliopoulos U(1) in D3/D7
brane inflation | cosmic strings from pseudo-anomalous fayet-iliopoulos u(1) in d3/d7 brane inflation | examine consequences developments fayet iliopoulos inflationary models. couple supergravity consistently allowed. argue inflation turns pseudo anomalous anomaly canceled schwarz dimensions. inflation proceeds usual parameter. cosmic strings pseudo anomalous potentially characteristics. originally currents. outline strings bounds summarize cosmological pages minor match versio | non_dup | [] |
2127541 | 10.1007/JHEP10(2010)077 | We give a unified treatment of different models of supersymmetry breaking and
mediation from a four dimensional effective field theory standpoint. In
particular a comparison between GMSB and various gravity mediated versions of
SUSY breaking shows that, once the former is embedded within a SUGRA framework,
there is no particular advantage to that mechanism from the point of view of
FCNC suppression. We point out the difficulties of all these scenarios - in
particular the cosmological modulus problem. We end with a discussion of
possible string theory realizations.Comment: Added clarifications and references, 20 page | A Comparison of Supersymmetry Breaking and Mediation Mechanisms | a comparison of supersymmetry breaking and mediation mechanisms | unified supersymmetry breaking mediation standpoint. gmsb versions susy breaking former embedded sugra advantage fcnc suppression. difficulties scenarios cosmological modulus problem. clarifications | non_dup | [] |
2129425 | 10.1007/JHEP10(2010)078 | At the LHC combinatorics make it unlikely that we will be able to observe
stop pair production with a decay to a semi-leptonic top pair and missing
energy for generic supersymmetric mass spectra. Using a Standard-Model top
tagger on fully hadronic top decays we can not only extract the stop signal but
also measure the top momentum. To illustrate the promise of tagging tops with
moderate boost we include a detailed discussion of our HEPTopTagger algorithm.Comment: version published by JHEP, contact information for HEPTopTagger
source code include | Stop Reconstruction with Tagged Tops | stop reconstruction with tagged tops | combinatorics unlikely stop leptonic missing generic supersymmetric spectra. tagger hadronic decays extract stop momentum. illustrate promise tagging tops moderate boost heptoptagger jhep heptoptagger | non_dup | [] |
2120849 | 10.1007/JHEP10(2010)079 | We generalize the coset construction of Callan, Coleman, Wess and Zumino to
theories in which the Lorentz group is spontaneously broken down to one of its
subgroups. This allows us to write down the most general low-energy effective
Lagrangian in which Lorentz invariance is non-linearly realized, and to explore
the consequences of broken Lorentz symmetry without having to make any
assumptions about the mechanism that triggers the breaking. We carry out the
construction both in flat space, in which the Lorentz group is a global
spacetime symmetry, and in a generally covariant theory, in which the Lorentz
group can be treated as a local internal symmetry. As an illustration of this
formalism, we construct the most general effective field theory in which the
rotation group remains unbroken, and show that the latter is just the
Einstein-aether theory.Comment: 45 pages, no figures | Effective Theory Approach to the Spontaneous Breakdown of Lorentz
Invariance | effective theory approach to the spontaneous breakdown of lorentz invariance | generalize coset callan coleman wess zumino lorentz spontaneously broken subgroups. lagrangian lorentz invariance linearly realized explore consequences broken lorentz assumptions triggers breaking. carry lorentz spacetime covariant lorentz symmetry. illustration formalism unbroken einstein aether pages | non_dup | [] |
2144093 | 10.1007/JHEP10(2010)081 | We investigate a scenario that the top quark is the only window to the dark
matter particle. We use the effective Lagrangian approach to write down the
interaction between the top quark and the dark matter particle. Requiring the
dark matter satisfying the relic density we obtain the size of the effective
interaction. We show that the scenario can be made consistent with the direct
and indirect detection experiments by adjusting the size of the effective
coupling. Finally, we calculate the production cross section for $t\bar t +
\chi \bar \chi$ at the Large Hadron Collider (LHC), which will give rise to an
interesting signature of a top-pair plus large missing energy.Comment: 17 pages including 8 figures; added references and a footnot | The Top Window for dark matter | the top window for dark matter | window particle. lagrangian particle. requiring satisfying relic interaction. indirect adjusting coupling. hadron collider signature missing pages footnot | non_dup | [] |
2123466 | 10.1007/JHEP10(2010)082 | We study the spectral problem of N=4 SYM with gauge group SO(N) and Sp(N). At
the planar level, the difference to the case of gauge group SU(N) is only due
to certain states being projected out, however at the non-planar level novel
effects appear: While 1/N-corrections in the SU(N) case are always associated
with splitting and joining of spin chains, this is not so for SO(N) and Sp(N).
Here the leading 1/N-corrections, which are due to non-orientable Feynman
diagrams in the field theory, originate from a term in the dilatation operator
which acts inside a single spin chain. This makes it possible to test for
integrability of the leading 1/N-corrections by standard (Bethe ansatz) means
and we carry out various such tests. For orthogonal and symplectic gauge group
the dual string theory lives on the orientifold AdS5xRP5. We discuss various
issues related to semi-classical strings on this background.Comment: 25 pages, 3 figures. v2: Minor clarifications, section 5 expande | On the spectral problem of N=4 SYM with orthogonal or symplectic gauge
group | on the spectral problem of n=4 sym with orthogonal or symplectic gauge group | planar projected planar splitting joining chains orientable feynman diagrams originate dilatation acts chain. integrability bethe ansatz carry tests. orthogonal symplectic lives orientifold strings pages figures. minor clarifications expande | non_dup | [] |
2129110 | 10.1007/JHEP10(2010)083 | We present an undated comprehensive analysis for the simplest dark matter
model in which a real singlet scalar with a $Z_2$ symmetry is introduced to
extend the standard model. According to the observed dark matter abundance, we
predict the dark matter direct and indirect detection cross sections for the
whole parameter space. The Breit-Wigner resonance effect has been considered to
calculate the thermally averaged annihilation cross section. It is found that
three regions can be excluded by the current direct and indirect dark matter
search experiments. In addition, we also discuss the implication of this model
for the Higgs searches at colliders.Comment: 14 pages, 7 figures. discussion and references added, published in
JHE | The real singlet scalar dark matter model | the real singlet scalar dark matter model | undated comprehensive simplest singlet extend model. abundance predict indirect space. breit wigner thermally averaged annihilation section. excluded indirect experiments. implication searches pages figures. | non_dup | [] |
2111984 | 10.1007/JHEP10(2010)084 | Heterotic horizons preserving 4 supersymmetries have sections which are T^2
fibrations over 6-dimensional conformally balanced Hermitian manifolds. We give
new examples of horizons with sections S^3 X S^3 X T^2 and SU(3). We then
examine the heterotic horizons which are T^4 fibrations over a Kahler
4-dimensional manifold. We prove that the solutions depend on 6 functions which
are determined by a non-linear differential system of 6 equations that include
the Monge-Ampere equation. We show that this system has an explicit solution
for the Kahler manifold S^2 X S^2. We also demonstrate that there is an
associated cohomological system which has solutions on del Pezzo surfaces. We
raise the question of whether for every solution of the cohomological problem
there is a solution of the differential system, and so a new heterotic horizon.
The horizon sections have topologies which include ((k-1) S^2 X S^4 # k (S^3 X
S^3)) X T^2$ indicating the existence of exotic black holes. We also find an
example of a horizon section which gives rise to two different near horizon
geometries.Comment: 33 pages, latex. Reference adde | Heterotic horizons, Monge-Ampere equation and del Pezzo surfaces | heterotic horizons, monge-ampere equation and del pezzo surfaces | heterotic horizons preserving supersymmetries fibrations conformally balanced hermitian manifolds. horizons examine heterotic horizons fibrations kahler manifold. monge ampere equation. kahler manifold cohomological pezzo surfaces. raise cohomological heterotic horizon. horizon topologies exotic holes. horizon horizon pages latex. adde | non_dup | [] |
2142960 | 10.1007/JHEP10(2010)085 | When the Standard Model is considered as an effective low-energy theory,
higher dimensional interaction terms appear in the Lagrangian. Dimension-six
terms have been enumerated in the classical article by Buchmueller and Wyler
[3]. Although redundance of some of those operators has been already noted in
the literature, no updated complete list has been published to date. Here we
perform their classification once again from the outset. Assuming baryon number
conservation, we find 15 + 19 + 25 = 59 independent operators (barring flavour
structure and Hermitian conjugations), as compared to 16 + 35 + 29 = 80 in
Ref.[3]. The three summed numbers refer to operators containing 0, 2 and 4
fermion fields. If the assumption of baryon number conservation is relaxed, 4
new operators arise in the four-fermion sector.Comment: 16 pages, no figures, v3: Redundant B-violating operator remove | Dimension-Six Terms in the Standard Model Lagrangian | dimension-six terms in the standard model lagrangian | lagrangian. enumerated buchmueller wyler redundance updated date. outset. baryon conservation barring flavour hermitian conjugations ref. summed fermion fields. baryon conservation relaxed arise fermion pages redundant violating remove | non_dup | [] |
2099962 | 10.1007/JHEP10(2010)086 | We study the minimal model of conformal technicolor, an SU(2) gauge theory
near a strongly coupled conformal fixed point, with conformal symmetry softly
broken by technifermion mass terms. Conformal symmetry breaking triggers chiral
symmetry breaking in the pattern SU(4) -> Sp(4), which gives rise to a
pseudo-Nambu-Goldstone boson that can act as a composite Higgs boson. The top
quark is elementary, and the top and electroweak gauge loop contributions to
the Higgs mass are cut off entirely by Higgs compositeness. In particular, the
model requires no top partners and no "little Higgs" mechanism. A nontrivial
vacuum alignment results from the interplay of the top loop and technifermion
mass terms. The composite Higgs mass is completely determined by the top loop,
in the sense that m_h/m_t is independent of the vacuum alignment and is
computable by a strong-coupling calculation. There is an additional composite
pseudoscalar A with mass larger than m_h and suppressed direct production at
LHC. We discuss the electroweak fit in this model in detail. Corrections to Z
-> bb and the T parameter from the top sector are suppressed by the enhanced
Sp(4) custodial symmetry. Even assuming that the strong contribution to the S
parameter is positive and usuppressed, a good electroweak fit can be obtained
for v/f ~ 0.25, where v and f are the electroweak and chiral symmetry breaking
scales respectively. This requires fine tuning at the 10% level.Comment: 34 pages, 4 figures; v2: updated precision electroweak fi | Minimal Conformal Technicolor and Precision Electroweak Tests | minimal conformal technicolor and precision electroweak tests | conformal technicolor conformal conformal softly broken technifermion terms. conformal breaking triggers chiral breaking pseudo nambu goldstone boson composite boson. elementary electroweak entirely compositeness. partners mechanism. nontrivial alignment interplay technifermion terms. composite alignment computable calculation. composite pseudoscalar suppressed lhc. electroweak detail. suppressed custodial symmetry. usuppressed electroweak electroweak chiral breaking respectively. fine tuning pages updated precision electroweak | non_dup | [] |
2108870 | 10.1007/JHEP10(2010)089 | The Flavour Symmetry of the Standard Model (SM) gauge sector is broken by the
fermion Yukawa couplings. Promoting the Yukawa matrices to scalar spurion
fields, one can break the flavour symmetry spontaneously by giving appropriate
vacuum expectation values (VEVs) to the spurion fields, and one encounters
Goldstone modes for every broken flavour symmetry generator. In this paper, we
point out various aspects related to the possible dynamical interpretation of
the Goldstone bosons: (i) In an effective-theory framework with local flavour
symmetry, the Goldstone fields represent the longitudinal modes for massive
gauge bosons. The spectrum of the latter follows the sequence of
flavour-symmetry breaking related to the hierarchies in Yukawa couplings and
flavour mixing angles. (ii) Gauge anomalies can be consistently treated by
adding higher-dimensional operators. (iii) Leaving the U(1) factors of the
flavour symmetry group as global symmetries, the respective Goldstone modes
behave as axions which can be used to resolve the strong CP problem by a
modified Peccei-Quinn mechanism. (iv) The dynamical picture of flavour symmetry
breaking implies new sources of flavour-changing neutral currents, which arise
from integrating out heavy scalar spurion fields and heavy gauge bosons. The
coefficients of the effective operators follow the minimal-flavour violation
principle.Comment: 27 pages, abstract and introduction extended, more detailed
discussion of heavy gauge boson spectrum and auxiliary heavy fermions,
outline restructured. Matches version to be published in JHE | Goldstone Bosons in Effective Theories with Spontaneously Broken Flavour
Symmetry | goldstone bosons in effective theories with spontaneously broken flavour symmetry | flavour broken fermion yukawa couplings. promoting yukawa spurion break flavour spontaneously giving expectation vevs spurion encounters goldstone broken flavour generator. goldstone bosons flavour goldstone longitudinal massive bosons. flavour breaking hierarchies yukawa couplings flavour angles. anomalies consistently adding operators. leaving flavour symmetries respective goldstone behave axions resolve peccei quinn mechanism. picture flavour breaking flavour changing neutral currents arise integrating spurion bosons. flavour violation pages boson auxiliary fermions outline restructured. matches | non_dup | [] |
2096048 | 10.1007/JHEP10(2010)090 | In a recent work [1] we consider the topological expansion for the non-mixed
observables (including the free energy) for the formal Cauchy matrix model. The
only restriction in [1] was the fact that all the branch points have to be
simple. This excludes a very interesting situation not encountered in the
literature before, namely the case in which two branch points merge in such a
way that no cycle is pinched. In this work we focus on this situation and
derive new formulas that apply to non-simple and non-singular branch-points.Comment: 42 pages, one appendix added, referee comments added, minor typos
correcte | New recursive residue formulas for the topological expansion of the
Cauchy Matrix Model | new recursive residue formulas for the topological expansion of the cauchy matrix model | topological observables formal cauchy model. restriction branch simple. excludes encountered branch merge pinched. derive formulas singular branch pages referee comments minor typos correcte | non_dup | [] |
2131384 | 10.1007/JHEP10(2010)091 | Higher spin Dirac operators on both the continuum sphere($S^2$) and its fuzzy
analog($S^2_F$) come paired with anticommuting chirality operators. A
consequence of this is seen in the fermion-like spectrum of these operators
which is especially true even for the case of integer-spin Dirac operators.
Motivated by this feature of the spectrum of a spin 1 Dirac operator on
$S_F^2$, we assume the spin 1 particles obey Fermi-Dirac statistics. This
choice is inspite of the lack of a well defined spin-statistics relation on a
compact surface such as $S^2$. The specific heats are computed in the cases of
the spin $\frac{1}{2}$ and spin 1 Dirac operators. Remarkably the specific heat
for a system of spin $\frac{1}{2}$ particles is more than that of the spin 1
case, though the number of degrees of freedom is more in the case of spin 1
particles. The reason for this is inferred through a study of the spectrums of
the Dirac operators in both the cases. The zero modes of the spin 1 Dirac
operator is studied as a function of the cut-off angular momentum $L$ and is
found to follow a simple power law. This number is such that the number of
states with positive energy for the spin 1 and spin $\frac{1}{2}$ system become
comparable. Remarks are made about the spectrums of higher spin Dirac operators
as well through a study of their zero-modes and the variation of their spectrum
with degeneracy. The mean energy as a function of temperature is studied in
both the spin $\frac{1}{2}$ and spin 1 cases. They are found to deviate from
the standard ideal gas law in 2+1 dimensions.Comment: 19 pages, 7 figures. The paper has been significantly modified. Main
results are unchange | Unusual Thermodynamics on the Fuzzy 2-Sphere | unusual thermodynamics on the fuzzy 2-sphere | dirac continuum sphere fuzzy analog come paired anticommuting chirality operators. fermion integer dirac operators. motivated dirac obey fermi dirac statistics. inspite heats frac dirac operators. remarkably frac freedom particles. inferred spectrums dirac cases. dirac law. frac comparable. remarks spectrums dirac degeneracy. frac cases. deviate ideal pages figures. modified. unchange | non_dup | [] |
2136035 | 10.1007/JHEP10(2010)092 | We model competition between different macroscopic orders in an holographic
context. The orders we considered are a superconducting order, modeled by a
charged scalar field, and a magnetic order modeled by a neutral scalar field.
We also discuss the case of two competing scalars coupled to a single gauge
field. In all cases discussed here the phases tend to compete, rather than
enhance each other. The condensation of one scalar hinders any further
instabilities, unless we have a sufficiently strong repulsive interactions
between the bulk scalars. We provide both analytic arguments and numerical
demonstration of this fact. Based on the cases discussed here, we conjecture
that holographic orders tend to compete for attractive bulk interactions,
including gravity, and to cooperate, or be mutually enhancing, for repulsive
bulk interactions between the corresponding order parameters.Comment: Minor changes, 17 pages, 5 figure | Competing Holographic Orders | competing holographic orders | competition macroscopic orders holographic context. orders superconducting modeled modeled neutral field. competing scalars field. tend compete enhance other. condensation hinders instabilities unless sufficiently repulsive scalars. analytic arguments demonstration fact. conjecture holographic orders tend compete attractive cooperate mutually enhancing repulsive minor pages | non_dup | [] |
2131922 | 10.1007/JHEP10(2010)093 | Structure function of e+e- to hadrons cross section proportional to the
longitudinal part of the hadron tensor is power suppressed with respect to an
event shape variable in the two-jet region. In the SCET framework, we study the
event shape distribution for this structure function to NLL level of accuracy.
As, a result we obtain the angular distribution of hadron jets as a function of
the thrust, in the two jet region. We further examine effects of
non-perturbative hadronization corrections by adopting a shape function that
reproduce the observed event shape distributions. Impacts of our findings on
the electroweak measurements via the jet angular forward-backward asymmetry are
discussed.Comment: 28 pages, 9 figure | Angular distribution of thrust axis with power-suppressed contribution
in e+e- annihilation | angular distribution of thrust axis with power-suppressed contribution in e+e- annihilation | hadrons longitudinal hadron suppressed region. scet accuracy. hadron jets thrust region. examine perturbative hadronization adopting reproduce distributions. impacts electroweak backward asymmetry pages | non_dup | [] |
2101749 | 10.1007/JHEP10(2010)094 | We investigate the interplay between the string scale and phenomenological
scales in orientifold compactifications. Specifically, we discuss in generality
the tension that often arises in accounting for neutrino masses, Yukawa
couplings, and a mu-term of the correct order and show that it often constrains
the string scale M_s. The discussion focuses on two scenarios where, (1) the
observed order of the neutrino masses are accounted for by a D-instanton
induced "stringy" Weinberg operator, or (2) effectively via the type I seesaw
mechanism with an instanton induced Majorana mass term. In both scenarios, the
string scale might be further constrained if the suppression factor of a single
D-instanton must account for two of the phenomenological scales. For the sake
of concreteness, we present phenomenologically viable quivers which exhibit
these effects and perform a systematic analysis of four-stack and five-stack
quivers which give rise to the exact MSSM spectrum and account for the order of
the neutrino masses via the stringy Weinberg operator.Comment: 27 page | The Weinberg Operator and a Lower String Scale in Orientifold
Compactifications | the weinberg operator and a lower string scale in orientifold compactifications | interplay phenomenological orientifold compactifications. generality tension arises accounting yukawa couplings constrains focuses scenarios accounted instanton stringy weinberg effectively seesaw instanton majorana term. scenarios constrained suppression instanton phenomenological scales. sake concreteness phenomenologically viable quivers exhibit stack stack quivers mssm stringy weinberg | non_dup | [] |
2133794 | 10.1007/JHEP10(2010)095 | We study the 'goldstini' scenario of Cheung, Nomura, and Thaler, in which
multiple independent supersymmetry (SUSY) breaking sectors lead to multiple
would-be goldstinos, changing collider and cosmological phenomenology. In
supergravity, potentially large corrections to the previous prediction of twice
the gravitino mass for goldstini masses can arise when their scalar partners
are stabilized far from the origin. Considerations arising from the complexity
of realistic string compactifications indicate that many of the independent
SUSY-breaking sectors should be conformally sequestered or situated in warped
Randall-Sundrum-like throats, further changing the predicted goldstini masses.
If the sequestered hidden sector is a metastable SUSY-breaking sector of the
Intriligator-Seiberg-Shih (ISS) type then multiple goldstini can originate from
within a single sector, along with many supplementary 'modulini', all with
masses of order twice the gravitino mass. These fields can couple to the
Supersymmetric Standard Model (SSM) via the 'Goldstino Portal'. Collider
signatures involving SSM sparticle decays can provide strong evidence for
warped-or-conformally-sequestered sectors, and of the ISS mechanism of SUSY
breaking. Along with axions and photini, the Goldstino Portal gives another
potential window to the hidden sectors of string theory.Comment: 30 pages, 3 figures; v2 minor changes, references adde | The Goldstini Variations | the goldstini variations | goldstini cheung nomura thaler supersymmetry susy breaking sectors goldstinos changing collider cosmological phenomenology. supergravity potentially twice gravitino goldstini arise partners stabilized origin. considerations arising realistic compactifications susy breaking sectors conformally sequestered situated warped randall sundrum throats changing goldstini masses. sequestered hidden metastable susy breaking intriligator seiberg shih goldstini originate supplementary modulini twice gravitino mass. couple supersymmetric goldstino portal collider signatures involving sparticle decays warped conformally sequestered sectors susy breaking. axions photini goldstino portal window hidden sectors pages minor adde | non_dup | [] |
2136567 | 10.1007/JHEP10(2010)096 | The problem of discriminating possible scenarios of TeV scale new physics
with large missing energy signature at the Large Hadron Collider (LHC) has
received some attention in the recent past. We consider the complementary, and
yet unexplored, case of theories predicting much softer missing energy spectra.
As there is enough scope for such models to fake each other by having similar
final states at the LHC, we have outlined a systematic method based on a
combination of different kinematic features which can be used to distinguish
among different possibilities. These features often trace back to the
underlying mass spectrum and the spins of the new particles present in these
models. As examples of "low missing energy look-alikes", we consider
Supersymmetry with R-parity violation, Universal Extra Dimensions with both
KK-parity conserved and KK-parity violated and the Littlest Higgs model with
T-parity violated by the Wess-Zumino-Witten anomaly term. Through detailed
Monte Carlo analysis of the four and higher lepton final states predicted by
these models, we show that the models in their minimal forms may be
distinguished at the LHC, while non-minimal variations can always leave scope
for further confusion. We find that, for strongly interacting new particle
mass-scale ~600 GeV (1 TeV), the simplest versions of the different theories
can be discriminated at the LHC running at sqrt{s}=14 TeV within an integrated
luminosity of 5 (30) fb^{-1}.Comment: 40 pages, 10 figures; v2: Further discussions, analysis and one
figure added, ordering of certain sections changed, minor modifications in
the abstract, version as published in JHE | Discrimination of low missing energy look-alikes at the LHC | discrimination of low missing energy look-alikes at the lhc | discriminating scenarios missing signature hadron collider past. complementary unexplored predicting softer missing spectra. scope fake outlined kinematic distinguish possibilities. trace spins models. missing look alikes supersymmetry parity violation universal extra parity conserved parity violated littlest parity violated wess zumino witten anomaly term. monte carlo lepton distinguished leave scope confusion. interacting simplest versions discriminated running sqrt luminosity .comment pages discussions ordering changed minor modifications | non_dup | [] |
2084507 | 10.1007/JHEP10(2010)097 | We present the complete set of Feynman rules producing the rational terms of
kind R_2 needed to perform any 1-loop calculation in the Electroweak Standard
Model. Our results are given both in the 't Hooft-Veltman and in the Four
Dimensional Helicity regularization schemes. We also verified, by using both
the 't Hooft-Feynman gauge and the Background Field Method, a huge set of Ward
identities -up to 4-points- for the complete rational part of the Electroweak
amplitudes. This provides a stringent check of our results and, as a
by-product, an explicit test of the gauge invariance of the Four Dimensional
Helicity regularization scheme in the complete Standard Model at 1-loop. The
formulae presented in this paper provide the last missing piece for completely
automatizing, in the framework of the OPP method, the 1-loop calculations in
the SU(3) X SU(2) X U(1) Standard Model.Comment: Many thanks to Huasheng Shao for having recomputed, independently of
us, all of the ${\rm R_2}$ effective vertices. Thanks to his help and by
comparing with an independent computation we performed in a general $R_\xi$
gauge, we could fix, in the present version, the following formulae: the
vertex $A l \bar l$ in Eq. (3.6), the vertex $Z \phi^+ \phi^-$ in Eq. (3.8),
Eqs (3.16), (3.17) and (3.18 | Feynman rules for the rational part of the Electroweak 1-loop amplitudes | feynman rules for the rational part of the electroweak 1-loop amplitudes | feynman producing rational kind electroweak model. hooft veltman helicity regularization schemes. verified hooft feynman huge ward identities rational electroweak amplitudes. stringent check invariance helicity regularization loop. formulae missing piece automatizing thanks huasheng shao recomputed independently vertices. thanks formulae | non_dup | [] |
2137993 | 10.1007/JHEP10(2010)098 | We study some vacua of N=9 three dimensional gauged supergravity. The theory
contains sixteen scalar fields parametrizing the exceptional coset space
${F_{4(-20)}}{SO(9)}$. Various AdS supersymmetric and some non-supersymmetric
vacua are found in both compact and non-compact gaugings with gauge groups
$SO(p)\times SO(9-p)$ for $p=0, 1, 2, 3, 4$, $G_{2(-14)}\times SL(2)$ and
$Sp(1,2)\times SU(2)$. We also study many RG flow solutions, both analytic and
numerical, interpolating between supersymmetric critical points in this theory.
All the flows considered here are driven by a relevant operator of dimension
$\Delta={3}{2}$. This operator breaks conformal symmetry as well as
supersymmetry and drives the CFT in the UV to another CFT in the IR with lower
supersymmetries.Comment: 30 pp. 6 figures, references and new information adde | Vacua and RG flows in N=9 three dimensional gauged supergravity | vacua and rg flows in n=9 three dimensional gauged supergravity | vacua gauged supergravity. sixteen parametrizing exceptional coset supersymmetric supersymmetric vacua gaugings analytic interpolating supersymmetric theory. flows delta breaks conformal supersymmetry drives adde | non_dup | [] |
2142099 | 10.1007/JHEP10(2010)099 | Previous studies of high-energy jet stopping in strongly-coupled plasmas have
lacked a clear gauge-theory specification of the initial state. We show how to
set up a well-defined gauge theory problem to study jet stopping in pure {\cal
N}=4 super Yang Mills theory (somewhat analogous to Hofman and Maldacena's
studies at zero temperature) and solve it by using gauge-gravity duality for
real-time, finite-temperature 3-point correlators. Previous studies have found
that the stopping distance scales with energy as E^{1/3} (with disagreement on
the gauge coupling dependence). We do find that none of the jet survives beyond
this scale, but we find that almost all of our jet stops at a parametrically
smaller scale proportional to (E L)^{1/4}, where L is the size of the
space-time region where the jet is initially created.Comment: 53 pages, 13 figures [Change from v1: A factor of 2 normalization
error is corrected in our intermediate calculations, starting from (2.12).
Final results are not affected. The other changes are minor and cosmetic. | Jet quenching in hot strongly coupled gauge theories revisited: 3-point
correlators with gauge-gravity duality | jet quenching in hot strongly coupled gauge theories revisited: 3-point correlators with gauge-gravity duality | stopping plasmas lacked specification state. stopping super mills somewhat analogous hofman maldacena solve duality correlators. stopping disagreement none survives stops parametrically initially pages normalization corrected affected. minor cosmetic. | non_dup | [] |
2131883 | 10.1007/JHEP10(2010)100 | We continue our investigation on the Nambu-Poisson description of M5-brane in
a large constant C-field background (NP M5-brane theory) constructed in
Refs.[1, 2]. In this paper, the low energy limit where the NP M5-brane theory
is applicable is clarified. The background independence of the NP M5-brane
theory is made manifest using the variables in the BLG model of multiple
M2-branes. An all order solution to the Seiberg-Witten map is also constructed.Comment: expanded explanations, minor corrections and typos correcte | More on the Nambu-Poisson M5-brane Theory: Scaling limit, background
independence and an all order solution to the Seiberg-Witten map | more on the nambu-poisson m5-brane theory: scaling limit, background independence and an all order solution to the seiberg-witten map | continue nambu poisson brane brane refs. brane applicable clarified. independence brane manifest branes. seiberg witten expanded explanations minor typos correcte | non_dup | [] |
2142026 | 10.1007/JHEP10(2010)101 | The planar solution is discussed for an N=3 Chern-Simons-matter theory
constructed recently by Gaiotto and Tomasiello. The planar resolvent is
obtained in terms of contour integrals. If the sum of two Chern-Simons levels
k_1,k_2 is small, the expectation value of a supersymmetric Wilson loop grows
exponentially with the total 't Hooft coupling, as is expected from AdS/CFT
correspondence. If one of the Chern-Simons levels, say k_2, is taken to
infinity, for which one of the 't Hooft coupling constants becomes zero, then
the exponential behavior disappears.Comment: 25 pages, (v2) references added, (v3) references added, typos
corrected, published versio | On Large N Solution of Gaiotto-Tomasiello Theory | on large n solution of gaiotto-tomasiello theory | planar chern simons gaiotto tomasiello. planar resolvent contour integrals. chern simons expectation supersymmetric wilson grows exponentially hooft correspondence. chern simons infinity hooft exponential pages typos corrected versio | non_dup | [] |
2135227 | 10.1007/JHEP10(2010)102 | In warped models that solve the hierarchy problem, there is generally no
dynamical relation between the size of the fifth dimension and the scale of
electroweak symmetry breaking (EWSB). The establishment of such a relation,
without fine-tuning, requires that Casimir contributions to the radion
potential not exceed the energy density associated with EWSB. Here, we examine
the use of supersymmetry for controlling the Casimir energy density and making
quantum contributions calculable. We compute the effects of supersymmetry
breaking at the UV and IR boundaries of warped backgrounds, in the presence of
brane localized kinetic terms. Various limits of supersymmetry breaking are
examined. We find that when supersymmetry is broken on the UV brane, vacuum
contributions to the radion potential can be controlled (as likely necessary
for EWSB to govern the radion potential) via small soft masses as well as a
"double volume suppression." Our formalism can also provide a setup for radion
stabilization by bulk fields, when supersymmetry is broken on both the UV and
the IR branes.Comment: Discussion of brane tension effects substantially revised. Main
physical conclusions unchanged. Latex, 20 page | On Taming the Warped Radion with Supersymmetry | on taming the warped radion with supersymmetry | warped solve hierarchy fifth electroweak breaking ewsb establishment fine tuning casimir radion exceed ewsb. examine supersymmetry controlling casimir calculable. supersymmetry breaking boundaries warped backgrounds brane localized terms. supersymmetry breaking examined. supersymmetry broken brane radion ewsb govern radion suppression. formalism setup radion stabilization supersymmetry broken brane tension substantially revised. unchanged. latex | non_dup | [] |
2090503 | 10.1007/JHEP10(2010)103 | Supersymmetry and R-symmetry Ward identities relate on-shell amplitudes in a
supersymmetric field theory. We solve these Ward identities for (Next-to)^K MHV
amplitudes of the maximally supersymmetric N=4 and N=8 theories. The resulting
superamplitude is written in a new, manifestly supersymmetric and R-invariant
form: it is expressed as a sum of very simple SUSY and SU(N)_R-invariant
Grassmann polynomials, each multiplied by a "basis amplitude". For (Next-to)^K
MHV n-point superamplitudes the number of basis amplitudes is equal to the
dimension of the irreducible representation of SU(n-4) corresponding to the
rectangular Young diagram with N columns and K rows. The linearly independent
amplitudes in this algebraic basis may still be functionally related by
permutation of momenta. We show how cyclic and reflection symmetries can be
used to obtain a smaller functional basis of color-ordered single-trace
amplitudes in N=4 gauge theory. We also analyze the more significant reduction
that occurs in N=8 supergravity because gravity amplitudes are not ordered. All
results are valid at both tree and loop level.Comment: 29 pages, published versio | Solution to the Ward Identities for Superamplitudes | solution to the ward identities for superamplitudes | supersymmetry ward identities relate amplitudes supersymmetric theory. solve ward identities amplitudes maximally supersymmetric theories. superamplitude manifestly supersymmetric susy grassmann polynomials multiplied superamplitudes amplitudes irreducible rectangular columns rows. linearly amplitudes algebraic functionally permutation momenta. cyclic reflection symmetries ordered trace amplitudes theory. analyze supergravity amplitudes ordered. valid pages versio | non_dup | [] |
2137388 | 10.1007/JHEP10(2010)104 | We study the impact of a type-I SUSY seesaw concerning lepton flavour
violation (LFV) both at low-energies and at the LHC. The study of the di-lepton
invariant mass distribution at the LHC allows to reconstruct some of the masses
of the different sparticles involved in a decay chain. In particular, the
combination with other observables renders feasible the reconstruction of the
masses of the intermediate sleptons involved in $ \chi_2^0\to \tilde \ell
\,\ell \to \ell \,\ell\,\chi_1^0$ decays. Slepton mass splittings can be either
interpreted as a signal of non-universality in the SUSY soft breaking-terms
(signalling a deviation from constrained scenarios as the cMSSM) or as being
due to the violation of lepton flavour. In the latter case, in addition to
these high-energy processes, one expects further low-energy manifestations of
LFV such as radiative and three-body lepton decays. Under the assumption of a
type-I seesaw as the source of neutrino masses and mixings, all these LFV
observables are related. Working in the framework of the cMSSM extended by
three right-handed neutrino superfields, we conduct a systematic analysis
addressing the simultaneous implications of the SUSY seesaw for both high- and
low-energy lepton flavour violation. We discuss how the confrontation of
slepton mass splittings as observed at the LHC and low-energy LFV observables
may provide important information about the underlying mechanism of LFV.Comment: 50 pages, 42 eps Figures, typos correcte | Interplay of LFV and slepton mass splittings at the LHC as a probe of
the SUSY seesaw | interplay of lfv and slepton mass splittings at the lhc as a probe of the susy seesaw | susy seesaw concerning lepton flavour violation lhc. lepton reconstruct sparticles chain. observables renders feasible reconstruction sleptons tilde decays. slepton splittings interpreted universality susy breaking signalling constrained scenarios cmssm violation lepton flavour. expects manifestations radiative lepton decays. seesaw mixings observables related. cmssm handed superfields conduct addressing simultaneous susy seesaw lepton flavour violation. confrontation slepton splittings observables pages typos correcte | non_dup | [] |
2140517 | 10.1007/JHEP10(2010)105 | We present a new approach to the reduction of one-loop amplitudes obtained by
reconstructing the tensorial expression of the scattering amplitudes. The
reconstruction is performed at the integrand level by means of a sampling in
the integration momentum. There are several interesting applications of this
novel method within existing techniques for the reduction of one-loop multi-leg
amplitudes: to deal with numerically unstable points, such as in the vicinity
of a vanishing Gram determinant; to allow for a sampling of the numerator
function based on real values of the integration momentum; to optimize the
numerical reduction in the case of long expressions for the numerator
functions.Comment: 20 pages, 2 figure | Tensorial Reconstruction at the Integrand Level | tensorial reconstruction at the integrand level | amplitudes reconstructing tensorial amplitudes. reconstruction integrand momentum. amplitudes deal numerically unstable vicinity vanishing gram determinant numerator optimize expressions numerator pages | non_dup | [] |
2132549 | 10.1007/JHEP10(2010)106 | We study the quantum effects on the Coulomb branch of N=2 SU(2)
supersymmetric Yang-Mills with fundamental matters compactified on R^3 x S^1,
and extract the explicit perturbative and leading non-perturbative corrections
to the moduli space metric predicted from the recent work of Gaiotto, Moore and
Neitzke on wall-crossing [1]. We verify the predicted metric by computing the
leading weak coupling instanton contribution to the four fermion correlation
using standard field theory techniques, and demonstrate perfect agreement. We
also demonstrate how previously known three dimensional quantities can be
recovered in appropriate small radius limit, and provide a simple geometric
picture from brane construction.Comment: 24 pages, 1 figur | Notes on Wall Crossing and Instanton in Compactified Gauge Theory with
Matter | notes on wall crossing and instanton in compactified gauge theory with matter | coulomb branch supersymmetric mills matters compactified extract perturbative perturbative moduli gaiotto moore neitzke crossing verify instanton fermion perfect agreement. quantities recovered geometric picture brane pages figur | non_dup | [] |
2142408 | 10.1007/JHEP10(2010)107 | Inspired by the work of Alday, Gaiotto and Tachikawa (AGT), we saw the
revival of Poincar{\'{e}}'s uniformization problem and Fuchsian equations
obtained thereof.
Three distinguished aspects are possessed by Fuchsian equations. First, they
are available via imposing a classical Liouville limit on level-two null-vector
conditions. Second, they fall into some A_1-type integrable systems. Third, the
stress-tensor present there (in terms of the Q-form) manifests itself as a kind
of one-dimensional "curve".
Thereby, a contact with the recently proposed Nekrasov-Shatashvili limit was
soon made on the one hand, whilst the seemingly mysterious derivation of
Seiberg-Witten prepotentials from integrable models become resolved on the
other hand. Moreover, AGT conjecture can just be regarded as a quantum version
of the previous Poincar{\'{e}}'s approach.
Equipped with these observations, we examined relations between spheric and
toric (classical) conformal blocks via Calogero-Moser/Heun duality. Besides, as
Sutherland model is also obtainable from Calogero-Moser by pinching tori at one
point, we tried to understand its eigenstates from the viewpoint of toric
diagrams with possibly many surface operators (toric branes) inserted. A
picture called "bubbling pants" then emerged and reproduced well-known results
of the non-critical self-dual c=1 string theory under a "blown-down" limit.Comment: 17 pages, 4 figures; v2: corrections and references added; v3:
Section 2.4.1 newly added thanks to JHEP referee advice. That classical
four-point spheric conformal blocks reproducing known SW prepotentials is
demonstrated via more examples, to appear in JHEP; v4: TexStyle changed onl | Uniformization, Calogero-Moser/Heun duality and Sutherland/bubbling
pants | uniformization, calogero-moser/heun duality and sutherland/bubbling pants | inspired alday gaiotto tachikawa revival poincar uniformization fuchsian thereof. distinguished possessed fuchsian equations. imposing liouville conditions. fall integrable systems. manifests kind thereby nekrasov shatashvili soon whilst seemingly mysterious derivation seiberg witten prepotentials integrable resolved hand. conjecture regarded poincar approach. equipped spheric toric conformal blocks calogero moser heun duality. besides sutherland obtainable calogero moser pinching tori tried eigenstates viewpoint toric diagrams possibly toric branes inserted. picture bubbling pants emerged reproduced blown pages newly thanks jhep referee advice. spheric conformal blocks reproducing prepotentials jhep texstyle changed | non_dup | [] |
2137368 | 10.1007/JHEP10(2010)108 | We study consequences of the Kawai-Lewellen-Tye (KLT) relations applied to
tree amplitudes in toroidal compactifications of string theory to four
dimensions. The closed string tree amplitudes with massless external states
respect a global SU(4)xSU(4) symmetry, which is enhanced to the SU(8)
R-symmetry of N=8 supergravity in the field theory limit. Our analysis focuses
on two aspects: (i) We provide a detailed account of the simplest
SU(8)-violating amplitudes. We classify these processes and derive explicit
superamplitudes for all local 5- and 6-point operators with SU(4)xSU(4)
symmetry at order alpha'^3. Their origin is the dilatonic operator exp(-6 phi)
R^4 in the closed-string effective action. (ii) We expand the 6-point closed
string tree amplitudes to order alpha'^3 and use two different methods to
isolate the SU(8)-singlet contribution from exp(-6 phi) R^4. This allows us to
extract the matrix elements of the unique SU(8)-invariant supersymmetrization
of R^4. Their single-soft scalar limits are non-vanishing. This demonstrates
that the N=8 supergravity candidate counterterm R^4 is incompatible with
continuous E_7(7) symmetry. From the soft scalar limits, we reconstruct to
quadratic order the SU(8)-invariant function of scalars that multiplies R^4,
and show that it satisfies the Laplace eigenvalue equation derived recently
from supersymmetry and duality constraints.Comment: 23 pages, published versio | Stringy KLT relations, global symmetries, and E_7(7) violation | stringy klt relations, global symmetries, and e_7(7) violation | consequences kawai lewellen amplitudes toroidal compactifications dimensions. amplitudes massless supergravity limit. focuses simplest violating amplitudes. classify derive superamplitudes alpha dilatonic action. expand amplitudes alpha isolate singlet extract supersymmetrization vanishing. demonstrates supergravity candidate counterterm incompatible symmetry. reconstruct quadratic scalars multiplies satisfies laplace eigenvalue supersymmetry duality pages versio | non_dup | [] |
2139702 | 10.1007/JHEP10(2010)109 | In this short note, we present two results about KLT relations discussed in
recent several papers. Our first result is the re-derivation of Mason-Skinner
MHV amplitude by applying the S_{n-3} permutation symmetric KLT relations
directly to MHV amplitude. Our second result is the equivalence proof of the
newly discovered S_{n-2} permutation symmetric KLT relations and the well-known
S_{n-3} permutation symmetric KLT relations. Although both formulas have been
shown to be correct by BCFW recursion relations, our result is the first direct
check using the regularized definition of the new formula.Comment: 15 Pages; v2: minor correction | Note on New KLT relations | note on new klt relations | papers. derivation mason skinner permutation amplitude. equivalence newly discovered permutation permutation relations. formulas bcfw recursion check regularized pages minor | non_dup | [] |
2121356 | 10.1007/JHEP10(2010)112 | We show that integrability and symmetries of the near horizon geometry of the
D1-D5 system determine the S-matrix for the scattering of magnons with
polarizations in AdS3 $\times$ S3 completely up to a phase. Using
semi-classical methods we evaluate the phase to the leading and to the one-loop
approximation in the strong coupling expansion. We then show that the phase
obeys the unitarity constraint implied by the crossing relations to the
one-loop order. We also verify that the dispersion relation obeyed by these
magnons is one-loop exact at strong coupling which is consistent with their BPS
nature.Comment: 40 pages, Latex, Role of Virasoro constraints clarified, version
matches with published versio | S-matrix for magnons in the D1-D5 system | s-matrix for magnons in the d1-d5 system | integrability symmetries horizon magnons polarizations phase. expansion. obeys unitarity implied crossing order. verify obeyed magnons pages latex virasoro clarified matches versio | non_dup | [] |
2137006 | 10.1007/JHEP10(2010)114 | The dynamical stability of a Julia-Zee solution in the AdS background in a
four dimensional Einstein-Yang-Mills-Higgs theory is studied. We find that the
model with a vanishing scalar field develops a non-zero value for the field at
a certain critical temperature which corresponds to a topological dyon in the
bulk and a topological phase transition at the boundary.Comment: 18 pages, 2 figures, 2 tables, sections 2 and 4 are shortened, an
error in the last part of section 5 is corrected and equations are modified.
This version to be published in JHE | Holographic Phase Transition to Topological Dyons | holographic phase transition to topological dyons | julia einstein mills studied. vanishing develops topological dyon topological pages tables shortened corrected modified. | non_dup | [] |
2136726 | 10.1007/JHEP10(2010)115 | The recently observed event excess in MiniBooNE anti-neutrino data is in
agreement with the LSND evidence for electron anti-neutrino appearance. We
propose an explanation of these data in terms of a (3+1) scheme with a sterile
neutrino including non-standard neutrino interactions (NSI) at neutrino
production and detection. The interference between oscillations and NSI
provides a source for CP violation which we use to reconcile different results
from neutrino and anti-neutrino data. Our best fit results imply NSI at the
level of a few percent relative to the standard weak interaction, in agreement
with current bounds. We compare the quality of the NSI fit to the one obtained
within the (3+1) and (3+2) pure oscillation frameworks. We also briefly comment
on using NSI (in an effective two-flavour framework) to address a possible
difference in neutrino and anti-neutrino results from the MINOS experiment.Comment: 28 pages, 9 figures, discussion improved, new appendix added,
conclusions unchange | MiniBooNE and LSND data: non-standard neutrino interactions in a (3+1)
scheme versus (3+2) oscillations | miniboone and lsnd data: non-standard neutrino interactions in a (3+1) scheme versus (3+2) oscillations | excess miniboone lsnd appearance. propose explanation sterile detection. interference oscillations violation reconcile data. imply percent bounds. oscillation frameworks. briefly comment flavour minos pages unchange | non_dup | [] |
2189514 | 10.1007/JHEP10(2011)006 | We use a multi-species supertube solution to construct an example of a
scaling microstate geometry for non-BPS black rings in five dimensions. We
obtain the asymptotic charges of the microstate geometry and show how the
solution is related to the corresponding non-BPS black ring. The supersymmetry
is broken in a very controlled manner using holonomy and this enables a close
comparison with a scaling, BPS microstate geometry. Requiring that there are no
closed time-like curves near the supertubes places additional restrictions on
the moduli space of physical, non-BPS solutions when compared to their BPS
analogs. For large holonomy the scaling non-BPS solution always has closed
time-like curves while for smaller holonomy there is a "gap" in the non-BPS
moduli space relative to the BPS counterpart.Comment: 36 pages, 11 figures. Version 2 has minor clarifications in the tex | Mind the Gap: Supersymmetry Breaking in Scaling, Microstate Geometries | mind the gap: supersymmetry breaking in scaling, microstate geometries | supertube microstate rings dimensions. asymptotic charges microstate ring. supersymmetry broken manner holonomy enables microstate geometry. requiring supertubes places restrictions moduli analogs. holonomy holonomy moduli pages figures. minor clarifications | non_dup | [] |
2180151 | 10.1007/JHEP10(2011)012 | This work explores the potential reach of the 7 TeV LHC to new colored states
in the context of simplified models and addresses the issue of which search
regions are necessary to cover an extensive set of event topologies and
kinematic regimes. This article demonstrates that if searches are designed to
focus on specific regions of phase space, then new physics may be missed if it
lies in unexpected corners. Simple multiregion search strategies can be
designed to cover all of kinematic possibilities. A set of benchmark models are
created that cover the qualitatively different signatures and a benchmark
multiregion search strategy is presented that covers these models.Comment: 30 pages, 8 Figures, 3 Tables. Version accepted at JHEP. Minor
changes. Added figur | Where the Sidewalk Ends: Jets and Missing Energy Search Strategies for
the 7 TeV LHC | where the sidewalk ends: jets and missing energy search strategies for the 7 tev lhc | explores colored simplified addresses cover extensive topologies kinematic regimes. demonstrates searches missed lies unexpected corners. multiregion cover kinematic possibilities. benchmark created cover qualitatively signatures benchmark multiregion covers pages tables. jhep. minor changes. figur | non_dup | [] |
2193517 | 10.1007/JHEP10(2011)016 | The three dimensional exact R symmetry of N=2 SCFTs extremizes the partition
function localized on a three sphere. Here we verify this statement at weak
coupling. We give a detailed analysis for two classes of models. The first one
is an SU(N)_k gauge theory at large k with both fundamental and adjoint matter
fields, while the second is a flavored version of the ABJ theory, where the CS
levels are large but they do not necessarily sum up to zero. We study in both
cases superpotential deformations and compute the R charges at different fixed
points. When these fixed points are connected by an RG flow we explicitly
verify that the free energy decreases at the endpoints of the flow between the
fixed points, corroborating the conjecture of an F-theorem in three dimensions.Comment: 28 pages, 3 figures, JHEP.cls, minor corrections, references adde | Z-extremization and F-theorem in Chern-Simons matter theories | z-extremization and f-theorem in chern-simons matter theories | scfts extremizes partition localized sphere. verify statement coupling. models. adjoint flavored necessarily zero. superpotential deformations charges points. explicitly verify endpoints corroborating conjecture pages jhep.cls minor adde | non_dup | [] |
144257813 | 10.1007/JHEP10(2011)022 | Tree-level gauge mediation (TGM) is a scenario of SUSY breaking in which the tree-level exchange of heavy (possibly GUT) vector fields generates flavor-universal sfermion masses. In this work we extend this framework to the case of E(6) that is the natural extension of the minimal case studied so far. Despite the number of possible E(6) subgroups containing G(SM) is large (we list all rank 6 subgroups), there are only three different cases corresponding to the number of vector messengers. As a robust prediction we find that sfermion masses are SU(5) invariant at the GUT scale, even if the gauge group does not contain SU(5). If SUSY breaking is mediated purely by the U(1) generator that commutes with SO(10) we obtain universal sfermion masses and thus can derive the CMSSM boundary conditions in a novel scenario | Extended tree-level gauge mediation | extended tree-level gauge mediation | mediation susy breaking possibly generates flavor universal sfermion masses. extend far. subgroups subgroups messengers. robust sfermion susy breaking purely generator commutes universal sfermion derive cmssm | non_dup | [] |
2186501 | 10.1007/JHEP10(2011)030 | We develop the geometry of four dimensional N=2 superspace where the entire
conformal algebra of SU(2,2|2) is realized linearly in the structure group
rather than just the SL(2,C) x U(2)_R subgroup of Lorentz and R-symmetries,
extending to N=2 our prior result for N=1 superspace. This formulation
explicitly lifts to superspace the existing methods of the N=2 superconformal
tensor calculus; at the same time the geometry, when degauged to SL(2,C) x
U(2)_R, reproduces the existing formulation of N=2 conformal supergravity
constructed by Howe.Comment: 43 pages; v2 references added, acknowledgments update | N=2 Conformal Superspace in Four Dimensions | n=2 conformal superspace in four dimensions | superspace conformal realized linearly subgroup lorentz symmetries extending superspace. formulation explicitly lifts superspace superconformal calculus degauged reproduces formulation conformal supergravity pages acknowledgments update | non_dup | [] |
2193023 | 10.1007/JHEP10(2011)036 | In this work we investigate the canonical quantization of 2+1 gravity with
cosmological constant $\Lambda>0$ in the canonical framework of loop quantum
gravity. The unconstrained phase space of gravity in 2+1 dimensions is
coordinatized by an SU(2) connection $A$ and the canonically conjugate triad
field $e$. A natural regularization of the constraints of 2+1 gravity can be
defined in terms of the holonomies of $A+=A + \sqrt\Lambda e$. As a first step
towards the quantization of these constraints we study the canonical
quantization of the holonomy of the connection $A_{\lambda}=A+\lambda e$ on the
kinematical Hilbert space of loop quantum gravity. The holonomy operator
associated to a given path acts non trivially on spin network links that are
transversal to the path (a crossing). We provide an explicit construction of
the quantum holonomy operator. In particular, we exhibit a close relationship
between the action of the quantum holonomy at a crossing and Kauffman's
q-deformed crossing identity. The crucial difference is that (being an operator
acting on the kinematical Hilbert space of LQG) the result is completely
described in terms of standard SU(2) spin network states (in contrast to
q-deformed spin networks in Kauffman's identity). We discuss the possible
implications of our result.Comment: 19 pages, references added. Published versio | Canonical quantization of non-commutative holonomies in 2+1 loop quantum
gravity | canonical quantization of non-commutative holonomies in 2+1 loop quantum gravity | canonical quantization cosmological lambda canonical gravity. unconstrained coordinatized connection canonically conjugate triad regularization holonomies sqrt lambda quantization canonical quantization holonomy connection lambda lambda kinematical hilbert gravity. holonomy acts trivially links transversal crossing holonomy operator. exhibit holonomy crossing kauffman deformed crossing identity. crucial acting kinematical hilbert deformed kauffman pages added. versio | non_dup | [] |
71032536 | 10.1007/JHEP10(2011)037 | We construct extensions of the Standard Model with two Higgs doublets, where there are flavour changing neutral currents both in the quark and leptonic sectors, with their strength fixed by the fermion mixing matrices V(CKM) and V(PMNS). These models are an extension to the leptonic sector of the class of models previously considered by Branco, Grimus and Lavoura, for the quark sector. We consider both the cases of Dirac and Majorana neutrinos and identify the minimal discrete symmetry required in order to implement the models in a natural way | Two-Higgs leptonic minimal flavour violation | two-higgs leptonic minimal flavour violation | extensions doublets flavour changing neutral currents leptonic sectors fermion pmns leptonic branco grimus lavoura sector. dirac majorana neutrinos implement | non_dup | [] |
84457276 | 10.1007/JHEP10(2011)043 | A definition of soft breaking of BEST symmetry in the field-antifield formalism is proposed, valid for general gauge theories and arbitrary gauge fixing. The Ward identities for the generating functionals of Green's functions are derived, and their gauge dependence is investigated. We discuss the Gribov-Zwanziger action to the one-parameter family of gauges. It is argued that gauge theories with a soft breaking of BEST symmetry are inconsistent.DFG/436 RUS 113/669/4LRSS/3558.2010.2RFBR-Ukraine/11-02-90445RFBR/09-02-0007 | Is soft breaking of BRST symmetry consistent? | is soft breaking of brst symmetry consistent? | breaking antifield formalism valid fixing. ward identities generating functionals investigated. gribov zwanziger gauges. argued breaking inconsistent.dfg lrss rfbr ukraine rfbr | non_dup | [] |
2193504 | 10.1007/JHEP10(2011)070 | In this work, some of the NLO QCD corrections for pp -> VVjj + X are
presented. A program in Mathematica based on the structure of FeynCalc which
automatically simplifies a set of amplitudes up to the hexagon level of rank 5
has been created for this purpose. We focus on two different topologies. The
first involves all the virtual contributions needed for quadruple electroweak
vector boson production, i.e. pp -> VVVV + X. In the second, the remaining
"bosonic" corrections to electroweak triple vector boson production with an
additional jet (pp -> VVV j + X) are computed. We show the factorization
formula of the infrared divergences of the bosonic contributions for VVVV and
VVVj production with V=(W,Z,gamma). Stability issues associated with the
evaluation of the hexagons up to rank 5 are studied. The CPU time of the
FORTRAN subroutines rounds the 2 milliseconds and seems to be competitive with
other more sophisticated methods. Additionally, in Appendix A the master
equations to obtain the tensor coefficients up to the hexagon level in the
external momenta convention are presented including the ones needed for small
Gram determinants.Comment: 48 pages,16 figure | Towards pp -> VVjj at NLO QCD: Bosonic contributions to triple vector
boson production plus jet | towards pp -> vvjj at nlo qcd: bosonic contributions to triple vector boson production plus jet | vvjj presented. mathematica feyncalc automatically simplifies amplitudes hexagon created purpose. topologies. involves virtual quadruple electroweak boson i.e. vvvv bosonic electroweak triple boson computed. factorization infrared divergences bosonic vvvv vvvj gamma hexagons studied. fortran subroutines rounds milliseconds competitive sophisticated methods. additionally master hexagon momenta convention gram pages | non_dup | [] |
2188371 | 10.1007/JHEP10(2011)073 | Single centered BPS black hole solutions exist only when the charge carried
by the black hole has positive discriminant. On the other hand the exact dyon
spectrum in heterotic string theory compactified on T^6 is known to contain
states with negative discriminant. We show that all of these negative
discriminant states can be accounted for as two centered black holes. Thus
after the contribution to the index from the two centered black holes is
subtracted from the total microscopic index, the index for states with negative
discriminant vanishes even for finite values of charges, in agreement with the
results from the black hole side. Bound state metamorphosis -- which requires
us to identify certain apparently different two centered configurations
according to a specific set of rules -- plays a crucial role in this analysis.
We also generalize these results to a class of CHL string theories.Comment: LaTeX file, 32 pages; v2: reference added; v3: added new section 3. | Negative discriminant states in N=4 supersymmetric string theories | negative discriminant states in n=4 supersymmetric string theories | centered discriminant. dyon heterotic compactified discriminant. discriminant accounted centered holes. centered holes subtracted microscopic discriminant vanishes charges side. metamorphosis apparently centered configurations plays crucial analysis. generalize latex file pages | non_dup | [] |
2186313 | 10.1007/JHEP10(2011)077 | We present a new duality between the F-terms of supersymmetric field theories
defined in two- and four-dimensions respectively. The duality relates N=2
supersymmetric gauge theories in four dimensions, deformed by an
Omega-background in one plane, to N=(2,2) gauged linear sigma-models in two
dimensions. On the four dimensional side, our main example is N=2 SQCD with
gauge group SU(L) and 2L fundamental flavours. Using ideas of Nekrasov and
Shatashvili, we argue that the Coulomb branch of this theory provides a
quantization of the classical Heisenberg SL(2) spin chain. Agreement with the
standard quantization via the Algebraic Bethe Ansatz implies the existence of
an isomorphism between the chiral ring of the 4d theory and that of a certain
two-dimensional theory. The latter can be understood as the worldvolume theory
on a surface operator/vortex string probing the Higgs branch of the same 4d
theory. We check the proposed duality by explicit calculation at low orders in
the instanton expansion. One striking consequence is that the Seiberg-Witten
solution of the 4d theory is captured by a one-loop computation in two
dimensions. The duality also has interesting connections with the AGT
conjecture, matrix models and topological string theory where it corresponds to
a refined version of the geometric transition.Comment: 51 pages, 7 figures. Additional comments, minor improvements and
references adde | Quantization of Integrable Systems and a 2d/4d Duality | quantization of integrable systems and a 2d/4d duality | duality supersymmetric respectively. duality relates supersymmetric deformed omega gauged sigma dimensions. sqcd flavours. ideas nekrasov shatashvili argue coulomb branch quantization heisenberg chain. quantization algebraic bethe ansatz isomorphism chiral theory. understood worldvolume vortex probing branch theory. check duality orders instanton expansion. striking seiberg witten captured dimensions. duality connections conjecture topological refined geometric pages figures. comments minor improvements adde | non_dup | [] |
2150392 | 10.1007/JHEP10(2011)087 | We show that the spinning magnetic one-brane in minimal five-dimensional
supergravity admits a decoupling limit that interpolates smoothly between a
self-dual null orbifold of AdS_3 \times S^2 and the near-horizon limit of the
extremal Kerr black hole times a circle. We use this interpolating solution to
understand the field theory dual to spinning M5 branes as a deformation of the
Discrete Light Cone Quantized (DLCQ) Maldacena-Stominger-Witten (MSW) CFT. In
particular, the conformal weights of the operators dual to the deformation
around AdS_3 \times S^2 are calculated. We present pieces of evidence showing
that a CFT dual to the four-dimensional extremal Kerr can be obtained from the
deformed MSW CFT.Comment: 5 page | Microscopics of Extremal Kerr from Spinning M5 Branes | microscopics of extremal kerr from spinning m5 branes | spinning brane supergravity admits decoupling interpolates smoothly orbifold horizon extremal kerr circle. interpolating spinning branes deformation cone quantized dlcq maldacena stominger witten cft. conformal weights deformation calculated. pieces extremal kerr deformed | non_dup | [] |
2124653 | 10.1007/JHEP10(2011)090 | In Grand Unified Theories (GUTs) from orbifold and various string
constructions the generic vector-like particles do not need to form complete
SU(5) or SO(10) representations. To realize them concretely, we present
orbifold SU(5) models, orbifold SO(10) models where the gauge symmetry can be
broken down to flipped SU(5) X U(1)_X or Pati-Salam SU(4)_C X SU(2)_L X SU(2)_R
gauge symmetries, and F-theory SU(5) models. Interestingly, these vector-like
particles can be at the TeV-scale so that the lightest CP-even Higgs boson mass
can be lifted, or play the messenger fields in the Gauge Mediated Supersymmetry
Breaking (GMSB). Considering GMSB, ultraviolet insensitive Anomaly Mediated
Supersymmetry Breaking (AMSB), and the deflected AMSB, we study the general
gaugino mass relations and their indices, which are valid from the GUT scale to
the electroweak scale at one loop, in the SU(5) models, the flipped SU(5) X
U(1)_X models, and the Pati-Salam SU(4)_C X SU(2)_L X SU(2)_R models. In the
deflected AMSB, we also define the new indices for the gaugino mass relations,
and calculate them as well. Using these gaugino mass relations and their
indices, we may probe the messenger fields at intermediate scale in the GMSB
and deflected AMSB, determine the supersymmetry breaking mediation mechanisms,
and distinguish the four-dimensional GUTs, orbifold GUTs, and F-theory GUTs.Comment: RevTex4, 45 pages, 15 tables, version to appear in JHE | General Gauge and Anomaly Mediated Supersymmetry Breaking in Grand
Unified Theories with Vector-Like Particles | general gauge and anomaly mediated supersymmetry breaking in grand unified theories with vector-like particles | grand unified guts orbifold constructions generic representations. realize concretely orbifold orbifold broken flipped pati salam symmetries models. interestingly lightest boson lifted messenger supersymmetry breaking gmsb gmsb ultraviolet insensitive anomaly supersymmetry breaking amsb deflected amsb gaugino indices valid electroweak flipped pati salam models. deflected amsb indices gaugino well. gaugino indices messenger gmsb deflected amsb supersymmetry breaking mediation distinguish guts orbifold guts revtex pages tables | non_dup | [] |
2191626 | 10.1007/JHEP10(2011)093 | We extract the leading twist-2 and subleading twist-3 Distribution Amplitudes
(DAs) of the rho meson using the HERA data on diffractive rho photoproduction.
We do so using several Colour Glass Condensate (CGC) inspired and a Regge
inspired dipole models. We find that our extracted twist-2 DA is not much model
dependent and is consistent with QCD Sum Rules and lattice predictions. The
extracted twist-3 DA is more model dependent but is still consistent with the
Sum Rules prediction.Comment: 21 pages, 10 figures, 3 tables. Section 6 revised, figures 8 and 9
and table 3 updated. Conclusions essentially unchange | Extracting the Distribution Amplitudes of the rho meson from the Color
Glass Condensate | extracting the distribution amplitudes of the rho meson from the color glass condensate | extract twist subleading twist amplitudes meson hera diffractive photoproduction. colour glass condensate inspired regge inspired dipole models. twist predictions. twist pages tables. revised updated. essentially unchange | non_dup | [] |
2167781 | 10.1007/JHEP10(2011)097 | We study leading singularities of scattering amplitudes which are obtained as
residues of an integral over a Grassmannian manifold. We recursively do the
transformation from twistors to momentum twistors and obtain an iterative
formula for Yangian invariants that involves a succession of dualized twistor
variables. This turns out to be useful in addressing the problem of classifying
the residues of the Grassmannian. The iterative formula leads naturally to new
coordinates on the Grassmannian in terms of which both composite and
non-composite residues appear on an equal footing. We write down residue
theorems in these new variables and classify the independent residues for some
simple examples. These variables also explicitly exhibit the distinct solutions
one expects to find for a given set of vanishing minors from Schubert calculus.Comment: 20 page | On the Classification of Residues of the Grassmannian | on the classification of residues of the grassmannian | singularities amplitudes grassmannian manifold. recursively twistors twistors iterative yangian invariants involves succession dualized twistor variables. turns addressing classifying grassmannian. iterative naturally grassmannian composite composite footing. residue theorems classify examples. explicitly exhibit expects vanishing minors schubert | non_dup | [] |
2183358 | 10.1007/JHEP10(2011)110 | In existing dark matter models with global symmetries the relic abundance of
dark matter is either equal to that of anti-dark matter (thermal WIMP), or
vastly larger, with essentially no remaining anti-dark matter (asymmetric dark
matter). By exploring the consequences of a primordial asymmetry on the coupled
dark matter and anti-dark matter Boltzmann equations we find large regions of
parameter space that interpolate between these two extremes. Interestingly,
this new asymmetric WIMP framework can accommodate a wide range of dark matter
masses and annihilation cross sections. The present-day dark matter population
is typically asymmetric, but only weakly so, such that indirect signals of dark
matter annihilation are not completely suppressed. We apply our results to
existing models, noting that upcoming direct detection experiments will
constrain a large region of the relevant parameter space.Comment: 32 pages, 6 figures, updated references, updated XENON100 bounds,
typo in figure caption correcte | Asymmetric WIMP dark matter | asymmetric wimp dark matter | symmetries relic abundance wimp vastly essentially asymmetric exploring consequences primordial asymmetry boltzmann interpolate extremes. interestingly asymmetric wimp accommodate annihilation sections. asymmetric weakly indirect annihilation suppressed. noting upcoming constrain pages updated updated xenon bounds typo caption correcte | non_dup | [] |
2191886 | 10.1007/JHEP10(2011)113 | Non-chiral operators with positive anomalous dimensions can have interesting
applications to supersymmetric model building. Motivated by this, we develop a
new method for obtaining the anomalous dimensions of non-chiral double-trace
operators in N=1 superconformal field theories (SCFTs) with weakly-coupled AdS
duals. Via the Hamiltonian formulation of AdS/CFT, we show how to directly
compute the anomalous dimension as a bound state energy in the gravity dual.
This simplifies previous approaches based on the four-point function and the
OPE. We apply our method to a class of effective AdS5 supergravity models, and
we find that the binding energy can have either sign. If such models can be UV
completed, they will provide the first calculable examples of SCFTs with
positive anomalous dimensions.Comment: 38 pages, 2 figures, refs adde | Anomalous Dimensions of Non-Chiral Operators from AdS/CFT | anomalous dimensions of non-chiral operators from ads/cft | chiral anomalous supersymmetric building. motivated obtaining anomalous chiral trace superconformal scfts weakly duals. formulation anomalous dual. simplifies ope. supergravity sign. completed calculable scfts anomalous pages refs adde | non_dup | [] |
2194691 | 10.1007/JHEP10(2011)119 | We construct flux-stabilised IIB compactifications whose extra dimensions
(EDs) have very different sizes, and use these to describe several vacua with a
TeV string scale. Because we can access regimes where 2 dimensions are
hierarchically larger than the other 4, we find examples where 2 dimensions are
micron-sized while the other 4 are at the weak scale in addition to standard
examples with all 6 EDs equally large. Besides providing UV completeness, the
phenomenology of these models is richer than vanilla large-dimensional models
in several ways: (i) they are supersymmetric, with SUSY broken at sub-eV scales
in the bulk but only nonlinearly realised in the SM sector, leading to no MSSM
superpartners and many more bulk missing-energy channels, as in supersymmetric
large extra dimensions (SLED); (ii) small cycles in the complicated
extra-dimensional geometry allow some KK states to reside at TeV scales even if
all 6 EDs are much larger; (iii) a rich spectrum of string and KK states at TeV
scales; and (iv) an equally rich spectrum of light moduli having unusually
small (but technically natural) masses, with potentially interesting
implications for cosmology and astrophysics that nonetheless evade new-force
constraints. The hierarchy problem is solved because the extra-dimensional
volume is naturally stabilised at exponentially large values: the EDs are CY
geometries with a 4D K3 or T^4-fibration over a 2D base, with moduli stabilised
within the LARGE-Volume scenario. The new technical step is the use of
poly-instanton corrections to the superpotential (which, unlike for simpler
models, are likely to be present on K3 or T^4-fibered CY compactifications) to
obtain a large hierarchy between the sizes of different dimensions. For several
scenarios we identify the low-energy spectrum and briefly discuss some of their
astrophysical, cosmological and phenomenological implications.Comment: Added discussion of polyinstantons and closed string loops; Corrected
minor errors and typos; Added references; Version to appear on JHEP; 38
pages, 2 figure | Anisotropic Modulus Stabilisation: Strings at LHC Scales with
Micron-sized Extra Dimensions | anisotropic modulus stabilisation: strings at lhc scales with micron-sized extra dimensions | stabilised compactifications extra sizes vacua scale. regimes hierarchically micron sized equally large. besides completeness phenomenology richer vanilla ways supersymmetric susy broken nonlinearly realised mssm superpartners missing supersymmetric extra sled cycles complicated extra reside equally moduli unusually technically potentially cosmology astrophysics nonetheless evade constraints. hierarchy solved extra naturally stabilised exponentially geometries fibration moduli stabilised scenario. poly instanton superpotential unlike simpler fibered compactifications hierarchy sizes dimensions. scenarios briefly astrophysical cosmological phenomenological polyinstantons loops corrected minor typos jhep pages | non_dup | [] |
2190971 | 10.1007/JHEP10(2011)123 | Stimulating a system with time dependent sources can enhance instabilities,
thus increasing the critical temperature at which the system transitions to
interesting low-temperature phases such as superconductivity or superfluidity.
After reviewing this phenomenon in non-equilibrium BCS theory (and its marginal
fermi liquid generalization) we analyze the effect in holographic
superconductors. We exhibit a simple regime in which the transition temperature
increases parametrically as we increase the frequency of the time-dependent
source.Comment: 19 pages, 2 figure. v3: Comments, references and one figure added.
Version to appear in JHE | Stimulated superconductivity at strong coupling | stimulated superconductivity at strong coupling | stimulating enhance instabilities superconductivity superfluidity. reviewing phenomenon marginal fermi generalization analyze holographic superconductors. exhibit parametrically pages figure. comments added. | non_dup | [] |
2160277 | 10.1007/JHEP10(2011)130 | We investigate the non-Pauli-Fierz(nPF) theory, a linearized massive gravity
with a generic graviton mass term, which has been ignored due to a ghost in its
spectrum and the resultant loss of unitarity. We first show that it is possible
to use the Lee-Wick mechanism, a unitarization through the decay of a ghost, in
order to handle the sixth mode ghost of nPF, and then check for the quantum
consistency. Once proven to be consistent, nPF could become a viable candidate
for a large distance modification of gravity, because it naturally solves the
intrinsic problems that most dark energy/modified gravity models suffer from:
It smoothly converges to general relativity at short distances, and the small
graviton mass necessary to modify gravity at large scales can be stable under
the radiative corrections from the minimal gravity-to-matter coupling.Comment: 1+16pp, accepted for JHE | Quantum Aspects of Massive Gravity II: Non-Pauli-Fierz Theory | quantum aspects of massive gravity ii: non-pauli-fierz theory | pauli fierz linearized massive generic graviton ignored ghost resultant unitarity. wick unitarization ghost handle sixth ghost check consistency. proven viable candidate modification naturally solves intrinsic suffer smoothly converges relativity distances graviton modify radiative | non_dup | [] |
2162292 | 10.1007/JHEP10(2011)139 | We study various aspects of the matrix models calculating free energies and
Wilson loop observables in supersymmetric Chern-Simons-matter theories on the
three-sphere. We first develop techniques to extract strong coupling results
directly from the spectral curve describing the large N master field. We show
that the strong coupling limit of the gauge theory corresponds to the so-called
tropical limit of the spectral curve. In this limit, the curve degenerates to a
planar graph, and matrix model calculations reduce to elementary line integrals
along the graph. As an important physical application of these tropical
techniques, we study N=3 theories with fundamental matter, both in the quenched
and in the unquenched regimes. We calculate the exact spectral curve in the
Veneziano limit, and we evaluate the planar free energy and Wilson loop
observables at strong coupling by using tropical geometry. The results are in
agreement with the predictions of the AdS duals involving tri-Sasakian
manifoldsComment: 32 pages, 7 figures. v2: small corrections, added an Appendix on the
relation with the approach of 1011.5487. v3: further corrections and
clarifications, final version to appear in JHE | Unquenched flavor and tropical geometry in strongly coupled
Chern-Simons-matter theories | unquenched flavor and tropical geometry in strongly coupled chern-simons-matter theories | calculating wilson observables supersymmetric chern simons sphere. extract describing master field. tropical curve. degenerates planar elementary integrals graph. tropical quenched unquenched regimes. veneziano planar wilson observables tropical geometry. duals involving sasakian manifoldscomment pages figures. clarifications | non_dup | [] |
2190673 | 10.1007/JHEP10(2011)146 | The Real Projective Plane is the lowest dimensional orbifold which, when
combined with the usual Minkowski space-time, gives rise to a unique model in
six flat dimensions possessing an exact Kaluza Klein (KK) parity as a relic
symmetry of the broken six dimensional Lorentz group. As a consequence of this
property, any model formulated on this background will include a stable Dark
Matter candidate. Loop corrections play a crucial role because they remove mass
degeneracy in the tiers of KK modes and induce new couplings which mediate
decays. We study the full one loop structure of the corrections by means of
counter-terms localised on the two singular points. As an application, the
phenomenology of the (2,0) and (0,2) tiers is discussed at the LHC. We identify
promising signatures with single and di-lepton, top antitop and 4 tops: in the
dilepton channel, present data from CMS and ATLAS may already exclude KK masses
up to 250 GeV, while by next year they may cover the whole mass range preferred
by WMAP data.Comment: 45 pages, 3 figure | The Universal Real Projective Plane: LHC phenomenology at one Loop | the universal real projective plane: lhc phenomenology at one loop | projective orbifold usual minkowski possessing kaluza klein parity relic broken lorentz group. formulated candidate. crucial remove degeneracy tiers induce couplings mediate decays. counter localised singular points. phenomenology tiers lhc. promising signatures lepton antitop tops dilepton atlas exclude cover preferred wmap pages | non_dup | [] |
2181107 | 10.1007/JHEP10(2011)149 | We find a class of non-supersymmetric multi-center solutions of the STU model
of five-dimensional ungauged supergravity. The solutions are determined by a
system of linear equations defined on a four-dimensional K\"ahler manifold with
vanishing Ricci scalar and a U(1) isometry. The most general class of such
K\"ahler manifolds was studied by LeBrun and they have non-trivial 2-cycles
that can support the topological fluxes characteristic of bubbled geometries.
After imposing an additional U(1) symmetry on the base we find explicit
multi-center supergravity solutions. We show that there is an infinite number
of regular multi-center solutions with non-trivial topology that are asymptotic
to the near-horizon limit of a BMPV black hole.Comment: 34 pages, 1 figur | Hair in the Back of a Throat: Non-Supersymmetric Multi-Center Solutions
from K\"ahler Manifolds | hair in the back of a throat: non-supersymmetric multi-center solutions from k\"ahler manifolds | supersymmetric ungauged supergravity. ahler manifold vanishing ricci isometry. ahler manifolds lebrun trivial cycles topological fluxes bubbled geometries. imposing supergravity solutions. infinite trivial topology asymptotic horizon bmpv pages figur | non_dup | [] |
6208010 | 10.1007/JHEP10(2012)001 | We explicitly construct two Chern-Simons gauged supergravities in three
dimensions with N=4 and N=8 supersymmetries and non-semisimple gauge groups.
The N=4 theory has scalar manifold $SO(4,3)/SO(4)\times SO(3)$ with the gauge
group $SO(3)\ltimes (\mathbf{T}^3,\hat{\mathbf{T}}^3)$. The theory describes
(1,0) six dimensional supergravity reduced on an SU(2) group manifold. The
equivalent Yang-Mills type gauged supergravity has SO(3) gauge group coupled to
three massive vector fields. The N=8 theory is described by
$SO(8,8)/SO(8)\times SO(8)$ scalar manifold, and the gauge group is given by
$SO(8)\ltimes \mathbf{T}^{28}$. The theory is a truncation of the $SO(8)\ltimes
\mathbf{T}^{28}$ gauged N=16 theory with scalar manifold $E_{8(8)}/SO(16)$ and
can be obtained by an S^7 compactification of type I theory in ten dimensions.
Domain wall solutions of both gauged supergravities are analytically found and
can be uplifted to higher dimensions. These provide domain wall vacua in the
three dimensional gauged supergravity framework which might be useful for the
study of Domain Wall$_3$/QFT$_2$ correspondence.Comment: 19 pages, no figures, typoes and a mistake in a sign corrected,
clarifications on the notations adde | Domain walls in three dimensional gauged supergravity | domain walls in three dimensional gauged supergravity | explicitly chern simons gauged supergravities supersymmetries semisimple groups. manifold ltimes mathbf mathbf describes supergravity manifold. mills gauged supergravity massive fields. manifold ltimes mathbf truncation ltimes mathbf gauged manifold compactification dimensions. gauged supergravities analytically uplifted dimensions. vacua gauged supergravity pages typoes mistake corrected clarifications notations adde | non_dup | [] |
6207785 | 10.1007/JHEP10(2012)002 | Tantalizing hints of the Higgs boson of mass around 125 GeV have been
reported at the LHC. We explore the MSSM parameter space in which the 125 GeV
state is identified as the heavier of the CP even Higgs bosons, and study two
scenarios where the two photon production rate can be significantly larger than
the standard model (SM). In one scenario, $\Gamma(H\to \gamma\gamma)$ is
enhanced by a light stau contribution, while the $WW^{\ast}$ ($ZZ^{\ast}$) rate
stays around the SM rate. In the other scenario, $\Gamma(H\to b\bar{b})$ is
suppressed and not only the $\gamma\gamma$ but also the $WW^{\ast}$
($ZZ^{\ast}$) rates should be enhanced. The $\tau\bar{\tau}$ rate can be
significantly larger or smaller than the SM rate in both scenarios. Other
common features of the scenarios include top quark decays into charged Higgs
boson, single and pair production of all Higgs bosons in $e^+e^-$ collisions at
$\sqrt{s}\lesssim 300$ GeV.Comment: 20 pages, 5 figures, accepted version for publication in JHE | Properties of 125 GeV Higgs boson in non-decoupling MSSM scenarios | properties of 125 gev higgs boson in non-decoupling mssm scenarios | tantalizing hints boson lhc. explore mssm heavier bosons scenarios gamma gamma gamma stau stays rate. gamma suppressed gamma gamma enhanced. scenarios. scenarios decays boson bosons collisions sqrt lesssim pages publication | non_dup | [] |
5252929 | 10.1007/JHEP10(2012)005 | We consider chiral perturbation theory for SU(2) at finite temperature $T$ in
a constant magnetic background $B$. We compute the thermal mass of the pions
and the pion decay constant to leading order in chiral perturbation theory in
the presence of the magnetic field. The magnetic field gives rise to a
splitting between $M_{\pi^0}$ and $M_{\pi^{\pm}}$ as well as between
$F_{\pi^0}$ and $F_{\pi^{\pm}}$. We also calculate the free energy and the
quark condensate to next-to-leading order in chiral perturbation theory. Both
the pion decay constants and the quark condensate are decreasing slower as a
function of temperature as compared to the case with vanishing magnetic field.
The latter result suggests that the critical temperature $T_c$ for the chiral
transition is larger in the presence of a constant magnetic field. The increase
of $T_c$ as a function of $B$ is in agreement with most model calculations but
in disagreement with recent lattice calculations.Comment: 24 pages and 9 fig | Chiral perturbation theory in a magnetic background - finite-temperature
effects | chiral perturbation theory in a magnetic background - finite-temperature effects | chiral perturbation pions pion chiral perturbation field. splitting condensate chiral perturbation theory. pion condensate decreasing slower vanishing field. chiral field. disagreement pages | non_dup | [] |
9260099 | 10.1007/JHEP10(2012)007 | In this note we study type II superstring theory on the direct product of
AdS3, the squashed three-sphere and a four-torus (AdS3 \times SqS3 \times T4).
We derive explicitly the Green-Schwarz action and discuss in detail the hidden
integrable structure corresponding to local and non-local currents. We find
that the model is classically integrable and that the currents generate a full
psu(1, 1|2) superalgebra, even though the corresponding spacetime isometries
are broken by the squashing.Comment: 19 page | Integrable Superstrings on the Squashed Three-sphere | integrable superstrings on the squashed three-sphere | superstring squashed sphere torus derive explicitly schwarz hidden integrable currents. classically integrable currents superalgebra spacetime isometries broken | non_dup | [] |
6206960 | 10.1007/JHEP10(2012)008 | We study the jets plus missing energy signature at the LHC in a scenario
where the gravitino is very light and the gluino is the next-to-lightest
supersymmetric particle and promptly decays into a gluon and a gravitino. We
consider both associated gravitino production with a gluino and gluino pair
production. By merging matrix elements with parton showers, we generate
inclusive signal and background samples and show how information on the gluino
and gravitino masses can be obtained by simple final state observables.Comment: 18 pages, 8 figures, 1 table; v2: typos corrected, version to appear
in JHE | Light gravitino production in association with gluinos at the LHC | light gravitino production in association with gluinos at the lhc | jets missing signature gravitino gluino lightest supersymmetric promptly decays gluon gravitino. gravitino gluino gluino production. merging parton showers inclusive gluino gravitino pages typos corrected | non_dup | [] |
5258870 | 10.1007/JHEP10(2012)009 | We consider a four-dimensional N=2 gauged supergravity coupled to matter
fields. The model is obtained by a U(1) gauging of a charged hypermultiplet and
therefore it is suitable for the study of holographic superconductivity. The
potential has a topologically flat direction and the parameter running on this
"moduli space" labels the new superconducting black holes. Zero temperature
solutions are constructed and the phase diagram of the theory is studied. The
model has rich dynamics. The retrograde condensate is just a special case in
the new class of black holes. The calculation of the entanglement entropy makes
manifest the properties of a generic solution and the superconductor at zero
temperature is in a confined cohesive phase. The parameter running on the
topologically flat direction is a marginal coupling in the dual field theory.
We prove this statement by considering the way double trace deformations are
treated in the AdS/CFT correspondence. Finally, we comment on a possible
connection, in the context of gauge/gravity dualities, between the geometry of
the scalar manifold in N=2 supergravity models and the space of marginal
deformations of the dual field theory.Comment: 32 pages, 11 figures. Introduction rewritten and clarified, comments
and details on section 4 added, acknowledgements rectified. To appear in JHE | Holographic Superconductors in a Cohesive Phase | holographic superconductors in a cohesive phase | gauged supergravity fields. gauging hypermultiplet holographic superconductivity. topologically running moduli labels superconducting holes. studied. dynamics. retrograde condensate holes. entanglement manifest generic superconductor confined cohesive phase. running topologically marginal theory. statement trace deformations correspondence. comment connection dualities manifold supergravity marginal deformations pages figures. rewritten clarified comments acknowledgements rectified. | non_dup | [] |
5249945 | 10.1007/JHEP10(2012)011 | We study the extension of the approach to the a-theorem of Komargodski and
Schwimmer to quantum field theories in d=6 spacetime dimensions. The dilaton
effective action is obtained up to 6th order in derivatives. The anomaly flow
a_UV - a_IR is the coefficient of the 6-derivative Euler anomaly term in this
action. It then appears at order p^6 in the low energy limit of n-point
scattering amplitudes of the dilaton for n > 3. The detailed structure with the
correct anomaly coefficient is confirmed by direct calculation in two examples:
(i) the case of explicitly broken conformal symmetry is illustrated by the free
massive scalar field, and (ii) the case of spontaneously broken conformal
symmetry is demonstrated by the (2,0) theory on the Coulomb branch. In the
latter example, the dilaton is a dynamical field so 4-derivative terms in the
action also affect n-point amplitudes at order p^6. The calculation in the
(2,0) theory is done by analyzing an M5-brane probe in AdS_7 x S^4.
Given the confirmation in two distinct models, we attempt to use dispersion
relations to prove that the anomaly flow is positive in general. Unfortunately
the 4-point matrix element of the Euler anomaly is proportional to stu and
vanishes for forward scattering. Thus the optical theorem cannot be applied to
show positivity. Instead the anomaly flow is given by a dispersion sum rule in
which the integrand does not have definite sign. It may be possible to base a
proof of the a-theorem on the analyticity and unitarity properties of the
6-point function, but our preliminary study reveals some difficulties.Comment: 41 pages, 5 figure | On renormalization group flows and the a-theorem in 6d | on renormalization group flows and the a-theorem in 6d | komargodski schwimmer spacetime dimensions. dilaton derivatives. anomaly euler anomaly action. amplitudes dilaton anomaly confirmed explicitly broken conformal illustrated massive spontaneously broken conformal coulomb branch. dilaton amplitudes analyzing brane confirmation attempt anomaly general. unfortunately euler anomaly vanishes scattering. positivity. anomaly integrand definite sign. analyticity unitarity preliminary reveals pages | non_dup | [] |
6207802 | 10.1007/JHEP10(2012)015 | We study physical properties of strongly coupled massive quantum liquids from
their spectral functions using the AdS/CFT correspondence. The generic model
that we consider is dense, heavy fundamental matter coupled to SU(N_c) super
Yang-Mills theory at finite temperature above the deconfinement phase
transition but below the scale set by the baryon number density. In this setup,
we study the current-current correlators of the baryon number density using new
techniques that employ a scaling behavior in the dual geometry. Our results,
the AC conductivity, the quasi-particle spectrum and the Drude-limit parameters
like the relaxation time are simple temperature-independent expressions that
depend only on the mass-squared to density ratio and display a crossover
between a baryon- and meson-dominated regime. We concentrated on the
(2+1)-dimensional defect case, but in principle our results can also be
generalized straightforwardly to other cases.Comment: 21 pages, 10 figures, extra paragraph and figure are added in
response to referee's comment | Physical Response Functions of Strongly Coupled Massive Quantum Liquids | physical response functions of strongly coupled massive quantum liquids | massive liquids correspondence. generic dense super mills deconfinement baryon density. setup correlators baryon employ geometry. conductivity quasi drude relaxation expressions squared display crossover baryon meson dominated regime. concentrated defect straightforwardly pages extra paragraph referee comment | non_dup | [] |
5236872 | 10.1007/JHEP10(2012)016 | We study the decay of a standard model-like Higgs boson into a gravitino and
a neutralino, which subsequently decays promptly into another gravitino and a
photon. Such a decay can be important in scenarios where the supersymmetry
breaking scale is of the order of a few TeV, and in the region of low
transverse momenta of the photon, it may provide the dominant contribution to
the final state with a photon and two gravitinos. We estimate the relevant
standard model backgrounds and the prospects for discovering this Higgs decay
through a photon and missing transverse energy signal at the LHC in terms of a
simplified model. We also give an explicit model with manifest, but
spontaneously broken, supersymmetry in which the usual MSSM soft terms are
promoted to supersymmetric operators involving a dynamical goldstino
supermultiplet. This model can give rise to a SM-like CP-even neutral Higgs
particle with a mass of 125 GeV, without requiring substantial radiative
corrections, and with couplings sufficiently large for a signal discovery
through the above mentioned Higgs decay channel with the upcoming data from the
LHC.Comment: 28 pages, 5 figures, 4 tables; v2: updated to JHEP version,
references adde | Higgs decay with monophoton + MET signature from low scale supersymmetry
breaking | higgs decay with monophoton + met signature from low scale supersymmetry breaking | boson gravitino neutralino subsequently decays promptly gravitino photon. scenarios supersymmetry breaking momenta gravitinos. backgrounds prospects discovering missing simplified model. manifest spontaneously broken supersymmetry usual mssm promoted supersymmetric involving goldstino supermultiplet. neutral requiring substantial radiative couplings sufficiently discovery upcoming pages tables updated jhep adde | non_dup | [] |
6206451 | 10.1007/JHEP10(2012)017 | We consider low scale gauge mediation models with a very light gravitino
m_{3/2}~16 eV, in the light of recent experimental hints on the Higgs boson
mass. The light gravitino is very interesting since there is no gravitino
over-production problem, but it seems difficult to explain the Higgs boson mass
of ~125 GeV. This is because of the conflict between the light gravitino mass
and heavy SUSY particle masses needed for producing the relatively heavy Higgs
boson mass. We consider two possible extensions in this paper: a singlet
extension of the Higgs sector, and strongly coupled gauge mediation. We show
that there is a large parameter space, in both scenarios, where the Higgs boson
mass of ~125 GeV is explained without any conflict with such a very light
gravitino.Comment: 23 pages, 5 figure | Higgs Boson Mass in Low Scale Gauge Mediation Models | higgs boson mass in low scale gauge mediation models | mediation gravitino hints boson mass. gravitino gravitino boson gev. conflict gravitino susy producing boson mass. extensions singlet mediation. scenarios boson conflict pages | non_dup | [] |
60625266 | 10.1007/JHEP10(2012)018 | Journal of High Energy Physics 2012.10 (2012): 018 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMA search for supersymmetry or other new physics resulting in similar final states is presented using a data sample of 4.73 fb-1 of pp collisions collected at √s = 7TeV with the CMS detector at the LHC. Fully hadronic final states are selected based on the variable MT2, an extension of the transverse mass in events with two invisible particles. Two complementary studies are performed. The first targets the region of parameter space with medium to high squark and gluino masses, in which the signal can be separated from the standard model backgrounds by a tight requirement on MT2. The second is optimized to be sensitive to events with a light gluino and heavy squarks. In this case, the MT2 requirement is relaxed, but a higher jet multiplicity and at least one b-tagged jet are required. No significant excess of events over the standard model expectations is observed. Exclusion limits are derived for the parameter space of the constrained minimal supersymmetric extension of the standard model, as well as on a variety of simplified model spectr | Search for supersymmetry in hadronic final states using MT2 in pp collisions at √s = 7 TeV | search for supersymmetry in hadronic final states using mt2 in pp collisions at √s = 7 tev | reproduced permission scuola internazionale superiore studi avanzati sissa artículo escrito elevado número autores solo referencian aparece primer lugar nombre grupo colaboración hubiere autores pertenecientes uama supersymmetry collisions lhc. hadronic invisible particles. complementary performed. targets squark gluino separated backgrounds tight requirement optimized gluino squarks. requirement relaxed multiplicity tagged required. excess expectations observed. exclusion constrained supersymmetric simplified spectr | non_dup | [] |
148783563 | 10.1007/JHEP10(2012)020 | We study the Fermi gas quantum mechanics associated to the ABJM matrix model. We develop a method to compute the grand partition function of the ABJM theory, and compute exactly the partition function Z (N) up to N = 9 with the Chern-Simons level k = 1. We find that the eigenvalue problem of this quantum mechanical system is reduced to the diagonalization of a certain Hankel matrix. In reducing the number of integrations by commuting coordinates and momenta, we find an exact relation concerning the grand partition function, which is interesting on its own right and very helpful for determining the partition function. We also study the TBA-type integral equations that allow us to compute the grand partition function numerically. Surprisingly, all of our exact partition functions are written in terms of polynomials of pi(-1) with rational coefficients | Exact results on the ABJM Fermi gas | exact results on the abjm fermi gas | fermi mechanics abjm model. grand partition abjm partition chern simons eigenvalue diagonalization hankel matrix. reducing integrations commuting momenta concerning grand partition helpful determining partition function. grand partition numerically. surprisingly partition polynomials rational | non_dup | [] |
5256743 | 10.1007/JHEP10(2012)022 | For many practical purposes, it is convenient to formulate unbroken
non-abelian gauge theories like QCD in a color-flow basis. We present a new
derivation of SU(N) interactions in the color-flow basis by extending the gauge
group to U(N)xU(1)' in such a way that the two U(1) factors cancel each other.
We use the quantum action principles to show the equivalence to the usual basis
to all orders in perturbation theory. We extend the known Feynman rules to
exotic color representations (e.g. sextets) and interactions (e.g.
$\epsilon_{ijk}$). We discuss practical applications as they occur in automatic
computation programs.Comment: 37 page | QCD in the Color-Flow Representation | qcd in the color-flow representation | practical purposes convenient formulate unbroken abelian basis. derivation extending cancel other. principles equivalence usual orders perturbation theory. extend feynman exotic representations e.g. sextets e.g. epsilon practical automatic | non_dup | [] |
5252824 | 10.1007/JHEP10(2012)028 | We consider a gauge/gravity dual model of thermalization which consists of a
collapsing thin matter shell in asymptotically Anti-de Sitter space. A central
aspect of our model is to consider a shell moving at finite velocity as
determined by its equation of motion, rather than a quasi-static approximation
as considered previously in the literature. By applying a divergence matching
method, we obtain the evolution of singularities in the retarded unequal time
correlator $G^R(t,t')$, which probes different stages of the thermalization. We
find that the number of singularities decreases from a finite number to zero as
the gauge theory thermalizes. This may be interpreted as a sign of decoherence.
Moreover, in a second part of the paper, we show explicitly that the thermal
correlator is characterized by the existence of singularities in the complex
time plane. By studying a quasi-static state, we show the singularities at real
times originate from contributions of normal modes. We also investigate the
possibility of obtaining complex singularities from contributions of
quasi-normal modes.Comment: 35 pages, 4 figure | Thermalization from gauge/gravity duality: Evolution of singularities in
unequal time correlators | thermalization from gauge/gravity duality: evolution of singularities in unequal time correlators | thermalization collapsing asymptotically sitter space. aspect moving quasi literature. divergence matching singularities retarded unequal correlator probes thermalization. singularities thermalizes. interpreted decoherence. explicitly correlator singularities plane. studying quasi singularities originate modes. obtaining singularities quasi pages | non_dup | [] |
5251178 | 10.1007/JHEP10(2012)036 | We study lattice effects in strongly coupled systems of fermions at a finite
density described by a holographic dual consisting of fermions in
Anti-de-Sitter space in the presence of a Reissner-Nordstrom black hole. The
lattice effect is encoded by a periodic modulation of the chemical potential
with a wavelength of order of the intrinsic length scales of the system. This
corresponds with a highly complicated "band structure" problem in AdS, which we
only manage to solve in the weak potential limit. The "domain wall" fermions in
AdS encoding for the Fermi surfaces in the boundary field theory diffract as
usually against the periodic lattice, giving rise to band gaps. However, the
deep infrared of the field theory as encoded by the near horizon AdS2 geometry
in the bulk reacts in a surprising way to the weak potential. The hybridization
of the fermions bulk dualizes into a linear combination of CFT1 "local quantum
critical" propagators in the bulk, characterized by momentum dependent
exponents displaced by lattice Umklapp vectors. This has the consequence that
the metals showing quasi-Fermi surfaces cannot be localized in band insulators.
In the AdS2 metal regime, where the conformal dimension of the fermionic
operator is large and no Fermi surfaces are present at low T/\mu, the lattice
gives rise to a characteristic dependence of the energy scaling as a function
of momentum. We predict crossovers from a high energy standard momentum AdS2
scaling to a low energy regime where exponents found associated with momenta
"backscattered" to a lower Brillioun zone in the extended zone scheme. We
comment on how these findings can be used as a unique fingerprint for the
detection of AdS2 like "pseudogap metals" in the laboratory.Comment: 42 pages, 5 figures; v2, minor correction, to appear in JHE | Lattice potentials and fermions in holographic non Fermi-liquids:
hybridizing local quantum criticality | lattice potentials and fermions in holographic non fermi-liquids: hybridizing local quantum criticality | fermions holographic consisting fermions sitter reissner nordstrom hole. encoded modulation intrinsic system. complicated manage solve limit. fermions encoding fermi diffract giving gaps. infrared encoded horizon reacts surprising potential. hybridization fermions dualizes propagators exponents displaced umklapp vectors. metals quasi fermi localized insulators. conformal fermionic fermi momentum. predict crossovers exponents momenta backscattered brillioun scheme. comment fingerprint pseudogap metals pages minor | non_dup | [] |
5255837 | 10.1007/JHEP10(2012)037 | Based on data corresponding to an integrated luminosity of 0.37 fb^-1
collected by the LHCb experiment in 2011, the following ratios of branching
fractions are measured:
B(B0 -> pi+ pi-) / B(B0 -> K+pi-) = 0.262 +/- 0.009 +/- 0.017,
(fs/fd) * B(Bs -> K+K-) / B(B^0 -> K+pi-) = 0.316 +/- 0.009 +/- 0.019,
(fs/fd) * B(Bs ->pi+ K-) / B(B0 -> K+pi-) = 0.074 +/- 0.006 +/- 0.006,
(fd/fs) * B(B0 -> K+K-) / B(Bs -> K+K-) = 0.018 {+ 0.008 - 0.007} +/- 0.009,
(fs/fd) * B(Bs -> pi+pi-) / B(B0 -> pi+pi-) = 0.050 {+ 0.011 - 0.009} +/-
0.004,
B(Lambda_b -> p pi-) / B(Lambda_b -> p K-) = 0.86 +/- 0.08 +/- 0.05, where
the first uncertainties are statistical and the second systematic. Using the
current world average of B(B0 -> K+pi-) and the ratio of the strange to light
neutral B meson production fs/fd measured by LHCb, we obtain:
B(B0 -> pi+pi-) = (5.08 +/- 0.17 +/- 0.37) x 10^-6,
B(Bs -> K+K-) = (23.0 +/- 0.7 +/- 2.3) x 10^-6,
B(Bs -> pi+K-) = (5.4 +/- 0.4 +/- 0.6) x 10^-6,
B(B0 -> K+K-) = (0.11 {+ 0.05 - 0.04} +/- 0.06) x 10^-6,
B(Bs -> pi+pi-) = (0.95 {+ 0.21 - 0.17} +/- 0.13) x 10^-6.
The measurements of B(Bs -> K+K-), B(Bs -> pi+ K-) and B(B0 -> K+K-) are the
most precise to date. The decay mode Bs -> pi+pi- is observed for the first
time with a significance of more than 5 sigma.Comment: 15 pages, 5 figures, 7 tables; v2 with minor changes after journal
revie | Measurement of $b$-hadron branching fractions for two-body decays into
charmless charged hadrons | measurement of $b$-hadron branching fractions for two-body decays into charmless charged hadrons | luminosity lhcb branching fractions lambda lambda systematic. strange neutral meson lhcb precise date. pages tables minor revie | non_dup | [] |
6207770 | 10.1007/JHEP10(2012)038 | Generic Painlev\'e VI tau function \tau(t) can be interpreted as four-point
correlator of primary fields of arbitrary dimensions in 2D CFT with c=1. Using
AGT combinatorial representation of conformal blocks and determining the
corresponding structure constants, we obtain full and completely explicit
expansion of \tau(t) near the singular points. After a check of this expansion,
we discuss examples of conformal blocks arising from Riccati, Picard, Chazy and
algebraic solutions of Painlev\'e VI.Comment: 24 pages, 1 figure; v3: added refs and minor clarifications, few
typos corrected; to appear in JHE | Conformal field theory of Painlev\'e VI | conformal field theory of painlev\'e vi | generic painlev interpreted correlator combinatorial conformal blocks determining singular points. check conformal blocks arising riccati picard chazy algebraic painlev pages refs minor clarifications typos corrected | non_dup | [] |