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84327447 | 10.1007/JHEP09(2017)116 | We use the framework of dark matter effective field theories to study the
complementarity of bounds for a dark matter particle with mass in the MeV
range. Taking properly into account the mixing between operators induced by the
renormalization group running, we impose experimental constraints coming from
the CMB, BBN, LHC, LEP, direct detection experiments and meson decays. In
particular, we focus on the case of a vector coupling between the dark matter
and the standard model fermions, and study to which extent future experiments
can hope to probe regions of parameters space which are not already ruled out
by current data.Comment: 19 pages, 2 figures. A few clarifications added, matches version
published in JHE | MeV Dark Matter: Model Independent Bounds | mev dark matter: model independent bounds | complementarity bounds range. properly renormalization running impose coming meson decays. fermions hope ruled pages figures. clarifications matches | non_dup | [] |
83834828 | 10.1007/JHEP09(2017)117 | Integrable $\sigma$-models, such as the principal chiral model,
${\mathbb{Z}}_T$-coset models for $T \in {\mathbb{Z}}_{\geq 2}$ and their
various integrable deformations, are examples of non-ultralocal integrable
field theories described by (cyclotomic) $r/s$-systems with twist function. In
this general setting, and when the Lie algebra ${\mathfrak{g}}$ underlying the
$r/s$-system is of classical type, we construct an infinite algebra of local
conserved charges in involution, extending the approach of Evans, Hassan,
MacKay and Mountain developed for the principal chiral model and symmetric
space $\sigma$-model. In the present context, the local charges are attached to
certain `regular' zeros of the twist function and have increasing degrees
related to the exponents of the untwisted affine Kac-Moody algebra
$\widehat{{\mathfrak{g}}}$ associated with ${\mathfrak{g}}$. The Hamiltonian
flows of these charges are shown to generate an infinite hierarchy of
compatible integrable equations.Comment: 67 pages, published versio | Local charges in involution and hierarchies in integrable sigma-models | local charges in involution and hierarchies in integrable sigma-models | integrable sigma principal chiral mathbb coset mathbb integrable deformations ultralocal integrable cyclotomic twist function. mathfrak infinite conserved charges involution extending evans hassan mackay mountain principal chiral sigma model. charges attached zeros twist exponents untwisted affine moody widehat mathfrak mathfrak flows charges infinite hierarchy compatible integrable pages versio | non_dup | [] |
83831513 | 10.1007/JHEP09(2017)118 | The top-quark mass is measured in the all-hadronic top-antitop quark decay
channel using proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$
= 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The data set
used in the analysis corresponds to an integrated luminosity of 20.2 fb$^{-1}$.
The large multi-jet background is modelled using a data-driven method. The
top-quark mass is obtained from template fits to the ratio of the three-jet to
the dijet mass. The three-jet mass is obtained from the three jets assigned to
the top quark decay. From these three jets the dijet mass is obtained using the
two jets assigned to the W boson decay. The top-quark mass is measured to be
173.72 $\pm$ 0.55 (stat.) $\pm$ 1.01 (syst.) GeV.Comment: 39 pages in total, author list starting page 23, 6 figures, 4 tables,
submitted to JHEP, All figures including auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-03 | Top-quark mass measurement in the all-hadronic $t\bar{t}$ decay channel
at $\sqrt{s}$ = 8 TeV with the ATLAS detector | top-quark mass measurement in the all-hadronic $t\bar{t}$ decay channel at $\sqrt{s}$ = 8 tev with the atlas detector | hadronic antitop proton proton collisions sqrt atlas cern hadron collider. luminosity modelled method. template fits dijet mass. jets assigned decay. jets dijet jets assigned boson decay. stat. syst. pages tables submitted jhep auxiliary | non_dup | [] |
83831687 | 10.1007/JHEP09(2017)119 | We study large families of theories of interacting spin 2 particles from the
point of view of causality. Although it is often stated that there is a unique
Lorentz invariant effective theory of massless spin 2, namely general
relativity, other theories that utilize higher derivative interactions do in
fact exist. These theories are distinct from general relativity, as they permit
any number of species of spin 2 particles, are described by a much larger set
of parameters, and are not constrained to satisfy the equivalence principle. We
consider the leading spin 2 couplings to scalars, fermions, and vectors, and
systematically study signal propagation in all these other families of
theories. We find that most interactions directly lead to superluminal
propagation of either a spin 2 particle or a matter particle, and interactions
that are subluminal generate other interactions that are superluminal. Hence,
such theories of interacting multiple spin 2 species have superluminality, and
by extension, acausality. This is radically different to the special case of
general relativity with a single species of minimally coupled spin 2, which
leads to subluminal propagation from sources satisfying the null energy
condition. This pathology persists even if the spin 2 field is massive. We
compare these findings to the analogous case of spin 1 theories, where higher
derivative interactions can be causal. This makes the spin 2 case very special,
and suggests that multiple species of spin 2 is forbidden, leading us to
general relativity as essentially the unique internally consistent effective
theory of spin 2.Comment: 31 pages, 4 figures, 1 table. V2: Some clarifications on EFT
breakdown and comparison to GR. Updated to resemble version published in JHE | General Relativity from Causality | general relativity from causality | families interacting causality. stated lorentz massless relativity utilize exist. relativity permit constrained satisfy equivalence principle. couplings scalars fermions systematically propagation families theories. superluminal propagation subluminal superluminal. interacting superluminality acausality. radically relativity minimally subluminal propagation satisfying condition. pathology persists massive. analogous causal. forbidden relativity essentially internally pages table. clarifications breakdown updated resemble | non_dup | [] |
86417681 | 10.1007/JHEP09(2017)120 | We study the spread of R\'enyi entropy between two halves of a
Sachdev-Ye-Kitaev (SYK) chain of Majorana fermions, prepared in a thermofield
double (TFD) state. The SYK chain model is a model of chaotic many-body
systems, which describes a one-dimensional lattice of Majorana fermions, with
spatially local random quartic interaction. We find that for integer R\'enyi
index $n>1$, the R\'enyi entanglement entropy saturates at a parametrically
smaller value than expected. This implies that the TFD state of the SYK chain
does not rapidly thermalize, despite being maximally chaotic: instead, it
rapidly approaches a prethermal state. We compare our results to the signatures
of thermalization observed in other quenches in the SYK model, and to intuition
from nearly-$\mathrm{AdS}_2$ gravity.Comment: 1+46 pages, 11 figure | Spread of entanglement in a Sachdev-Ye-Kitaev chain | spread of entanglement in a sachdev-ye-kitaev chain | spread enyi halves sachdev kitaev majorana fermions thermofield state. chaotic describes majorana fermions spatially quartic interaction. integer enyi enyi entanglement saturates parametrically expected. rapidly thermalize maximally chaotic rapidly prethermal state. signatures thermalization quenches intuition nearly mathrm pages | non_dup | [] |
86418138 | 10.1007/JHEP09(2017)121 | In this paper we discuss geodesic Witten diagrams in generic holographic
conformal field theories with boundary or defect. Boundary CFTs allow two
different decompositions of two-point functions into conformal blocks: boundary
channel and ambient channel. Building on earlier work, we derive a holographic
dual of the boundary channel decomposition in terms of bulk-to-bulk propagators
on lower dimensional AdS slices. In the situation in which we can treat the
boundary or defect as a perturbation around pure AdS spacetime, we obtain the
leading corrections to the two-point function both in boundary and ambient
channel in terms of geodesic Witten diagrams which exactly reproduce the
decomposition into corresponding conformal blocks on the field theory side.Comment: 28 pages, 4 figures, v2:included hypergeometric identities for
generic no-brane case, references added, v3:published versio | Boundary Holographic Witten Diagrams | boundary holographic witten diagrams | geodesic witten diagrams generic holographic conformal defect. cfts decompositions conformal blocks ambient channel. derive holographic decomposition propagators slices. treat defect perturbation spacetime ambient geodesic witten diagrams reproduce decomposition conformal blocks pages hypergeometric identities generic brane versio | non_dup | [] |
83846559 | 10.1007/JHEP09(2017)122 | The recent direct observation of gravitational waves (GW) from merging black
holes opens up the possibility of exploring the theory of gravity in the strong
regime at an unprecedented level. It is therefore interesting to explore which
extensions to General Relativity (GR) could be detected. We construct an
Effective Field Theory (EFT) satisfying the following requirements. It is
testable with GW observations; it is consistent with other experiments,
including short distance tests of GR; it agrees with widely accepted principles
of physics, such as locality, causality and unitarity; and it does not involve
new light degrees of freedom. The most general theory satisfying these
requirements corresponds to adding to the GR Lagrangian operators constructed
out of powers of the Riemann tensor, suppressed by a scale comparable to the
curvature of the observed merging binaries. The presence of these operators
modifies the gravitational potential between the compact objects, as well as
their effective mass and current quadrupoles, ultimately correcting the
waveform of the emitted GW.Comment: v1: 43+16 pages, 11 figures, 2 tables; v2: minor corrections; v3:
minor corrections, JHEP published versio | An effective formalism for testing extensions to General Relativity with
gravitational waves | an effective formalism for testing extensions to general relativity with gravitational waves | gravitational merging holes opens exploring unprecedented level. explore extensions relativity detected. satisfying requirements. testable agrees widely principles locality causality unitarity involve freedom. satisfying adding lagrangian powers riemann suppressed comparable curvature merging binaries. modifies gravitational quadrupoles ultimately correcting waveform emitted pages tables minor minor jhep versio | non_dup | [] |
84329178 | 10.1007/JHEP09(2017)123 | We consider the one-parameter generalization $S^4_q$ of 4-sphere with a
conical singularity due to identification $\tau=\tau + 2 \pi q$ in one
isometric angle. We compute the value of the spectral zeta-function at zero
$z(q) = \zeta(0, q)$ that controls the coefficient of the logarithmic UV
divergence of the one-loop partition function on $S^4_q$. While the value of
the conformal anomaly a-coefficient is proportional to $z(1)$, we argue that in
general the second $c = C_T$ anomaly coefficient is related to a particular
combination of the second and first derivatives of $z(q) $ at $q=1$. The
universality of this relation for $C_T$ is supported also by examples in 6 and
2 dimensions. We use it to compute the c-coefficient for conformal higher spins
finding that it coincides with the "$r=-1$" value of the one-parameter Ansatz
suggested in arXiv:1309.0785. Like the sums of $a_s$ and $c_s$ coefficients,
the regularized sum of $z_s(q)$ over the whole tower of conformal higher spins
$s=1,2, ...$ is found to vanish, implying UV finiteness on $S^4_q$ and thus
also the vanishing of the associated Re'nyi entropy. Similar conclusions are
found to apply to the standard 2-derivative massless higher spin tower. We also
present an independent computation of the full set of conformal anomaly
coefficients of the 6d Weyl graviton theory defined by a particular combination
of the three 6d Weyl invariants that has a (2,0) supersymmetric extension.Comment: 29 pages. v2: minor change | $C_T$ for conformal higher spin fields from partition function on
conically deformed sphere | $c_t$ for conformal higher spin fields from partition function on conically deformed sphere | generalization sphere conical singularity isometric angle. zeta zeta logarithmic divergence partition conformal anomaly argue anomaly derivatives universality dimensions. conformal spins coincides ansatz sums regularized tower conformal spins vanish implying finiteness vanishing entropy. massless tower. conformal anomaly weyl graviton weyl invariants supersymmetric pages. minor | non_dup | [] |
93939052 | 10.1007/JHEP09(2017)124 | We discuss the effect of Beyond the Standard Model charged current
interactions on the detection of the Cosmic Neutrino Background by neutrino
capture on tritium in a PTOLEMY-like detector. We show that the total capture
rate can be substantially modified for Dirac neutrinos if scalar or tensor
right-chiral currents, with strength consistent with current experimental
bounds, are at play. We find that the total capture rate for Dirac neutrinos,
$\Gamma_{\rm D}^{\rm BSM}$, can be between 0.3 to 2.2 of what is expected for
Dirac neutrinos in the Standard Model, $\Gamma_{\rm D}^{\rm SM}$, so that it
can be made as large as the rate expected for Majorana neutrinos with only
Standard Model interactions. A non-negligible primordial abundance of
right-handed neutrinos can only worsen the situation, increasing $\Gamma_{\rm
D}^{\rm BSM}$ by 30 to 90\%. On the other hand, if a much lower total rate is
measured than what is expected for $\Gamma_{\rm D}^{\rm SM}$, it may be a sign
of new physics.Comment: Version published in JHEP. Some comments and references adde | Impact of Beyond the Standard Model Physics in the Detection of the
Cosmic Neutrino Background | impact of beyond the standard model physics in the detection of the cosmic neutrino background | cosmic capture tritium ptolemy detector. capture substantially dirac neutrinos chiral currents bounds play. capture dirac neutrinos gamma dirac neutrinos gamma majorana neutrinos interactions. negligible primordial abundance handed neutrinos worsen gamma gamma jhep. comments adde | non_dup | [] |
83855559 | 10.1007/JHEP09(2017)125 | We study entanglement entropy and the free energy in recently constructed
holographic duals for 5d SCFTs in type IIB supergravity. The solutions exhibit
mild singularities, which could potentially complicate holographic
applications. We use the relation of the entanglement entropy for a spherical
entangling surface to the free energy of the field theory on the five sphere as
a well-motivated benchmark to assess how problematic the singularities are. The
holographic supergravity computations give well-defined results for both
quantities and they satisfy the expected relations. This supports the
interpretation of the solutions as holographic duals for 5d SCFTs and gives
first quantitative indications for the nature of the dual SCFTs.Comment: 25 pages, 3 figure | Entanglement entropy vs. free energy in IIB supergravity duals for 5d
SCFTs | entanglement entropy vs. free energy in iib supergravity duals for 5d scfts | entanglement holographic duals scfts supergravity. exhibit mild singularities potentially complicate holographic applications. entanglement spherical entangling sphere motivated benchmark problematic singularities are. holographic supergravity computations quantities satisfy relations. supports holographic duals scfts indications pages | non_dup | [] |
73957925 | 10.1007/JHEP09(2017)126 | We classify Minkowski$_4$ solutions in type IIA supergravity, with N=2
supersymmetry and an SU(2) R-symmetry of a certain type. Many subcases can be
reduced to relatively simple PDEs, among which we recover various intersecting
brane systems, and AdS$_d$ solutions, $d=5,6,7$, and in particular the recently
found general massive AdS$_7$ solutions. Imposing compactness of the internal
six-manifold we obtain promising solutions with localized D-branes and
O-planes.Comment: v2: Result slightly strengthened, typos corrected. v3: Published
Versio | Minimal flux Minkowski classification | minimal flux minkowski classification | classify minkowski supergravity supersymmetry type. subcases pdes recover intersecting brane massive solutions. imposing compactness manifold promising localized branes strengthened typos corrected. versio | non_dup | [] |
84328003 | 10.1007/JHEP09(2017)130 | We show that there exist infinite number of recurrence relations valid for
all energies among the open bosonic string scattering amplitudes (SSA) of three
tachyons and one arbitrary string state, or the Lauricella SSA. Moreover, these
infinite number of recurrence relations can be used to solve all the Lauricella
SSA and express them in terms of one single four tachyon amplitude. These
results extend the solvability of SSA at the high energy, fixed angle
scattering limit and those at the Regge scattering limit discovered previously.Comment: 19 pages. v2: Fig.1 adde | Solving Lauricella String Scattering Amplitudes through Recurrence
Relations | solving lauricella string scattering amplitudes through recurrence relations | infinite recurrence valid bosonic amplitudes tachyons lauricella ssa. infinite recurrence solve lauricella express tachyon amplitude. extend solvability regge discovered pages. fig. adde | non_dup | [] |
84093713 | 10.1007/JHEP09(2017)131 | N=4 supersymmetric extensions of the l-conformal Galilei algebra are
constructed by properly extending the Lie superalgebra associated with the most
general N=4 superconformal group in one dimension D(2,1;a). If the acceleration
generators in the superalgebra form analogues of the irreducible (1,4,3)-,
(2,4,2)-, (3,4,1)-, and (4,4,0)-supermultiplets of D(2,1;a), the parameter a
turns out to be constrained by the Jacobi identities. In contrast, if the tower
of the acceleration generators resembles a component decomposition of a generic
real superfield, which is a reducible representation of D(2,1;a), a remains
arbitrary. An N=4 l-conformal Galilei superalgebra recently proposed in [Phys.
Lett. B 771 (2017) 401] is shown to be a particular instance of a more general
construction in this work.Comment: V2: 9 pages. Introductory part extended, two references added. The
version to appear in JHE | N=4 l-conformal Galilei superalgebras inspired by D(2,1;a)
supermultiplets | n=4 l-conformal galilei superalgebras inspired by d(2,1;a) supermultiplets | supersymmetric extensions conformal galilei properly extending superalgebra superconformal acceleration generators superalgebra analogues irreducible supermultiplets turns constrained jacobi identities. tower acceleration generators resembles decomposition generic superfield reducible arbitrary. conformal galilei superalgebra phys. lett. pages. introductory added. | non_dup | [] |
83847614 | 10.1007/JHEP09(2017)134 | We perform the renormalization of different types of Two-Higgs-Doublet Models
for the calculation of observables at next-to-leading order. In detail, we
suggest four different renormalization schemes based on on-shell
renormalization conditions as far as possible and on MSbar prescriptions for
the remaining field-mixing parameters where no distinguished on-shell condition
exists and make contact to existing schemes in the literature. In particular,
we treat the tadpole diagrams in different ways and discuss issues of gauge
independence and perturbative stability in the considered schemes. The
renormalization group equations for the MSbar parameters are solved in each
scheme, so that a consistent renormalization scale variation can be performed.
We have implemented all Feynman rules including counterterms and the
renormalization conditions into a FeynArts model file, so that amplitudes and
squared matrix elements can be generated automatically. As an application we
compute the decay of the light, CP-even Higgs boson of the Two-Higgs-Doublet
Model into four fermions at next-to-leading order. The comparison of different
schemes and the investigation of the renormalization scale dependence allows us
to test the perturbative consistency in each of the renormalization schemes,
and to get a better estimate of the theoretical uncertainty that arises due to
the truncation of the perturbation series.Comment: 44 pages, 8 figures, revised version, to appear in JHE | Renormalization schemes for the Two-Higgs-Doublet Model and applications
to h -> WW/ZZ -> 4fermions | renormalization schemes for the two-higgs-doublet model and applications to h -> ww/zz -> 4fermions | renormalization doublet observables order. renormalization schemes renormalization msbar prescriptions distinguished schemes literature. treat tadpole diagrams ways independence perturbative schemes. renormalization msbar solved renormalization performed. implemented feynman counterterms renormalization feynarts file amplitudes squared automatically. boson doublet fermions order. schemes renormalization perturbative consistency renormalization schemes arises truncation perturbation pages revised | non_dup | [] |
73407583 | 10.1007/JHEP09(2017)135 | We study D3-brane theories that are dually described as deformations of two
different $\mathcal{N}=2$ superconformal theories with massless monopoles and
dyons. These arise at the self-intersection of a seven-brane in F-theory, which
cuts out a link on a small three-sphere surrounding the self-intersection. The
spectrum is studied by taking small loops in the three-sphere, yielding a
link-induced monodromy action on string junction D3-brane states, and
subsequently quotienting by the monodromy. This reduces the differing flavor
algebras of the $\mathcal{N}=2$ theories to the same flavor algebra, as
required by duality, and projects out charged states, yielding an
$\mathcal{N}=1$ superconformal theory on the D3-brane. In one, a deformation of
a rank one Argyres-Douglas theory retains its $SU(2)$ flavor symmetry and
exhibits a charge neutral flavor triplet that is comprised of electron, dyon,
and monopole string junctions. From duality we argue that the monodromy
projection should also be imposed away from the conformal point, in which case
the D3-brane field theory appears to exhibit confinement of electrons, dyons,
and monopoles. We will address the mathematical counterparts in a companion
paper.Comment: 28+20 pages, 8 figures 6 table | Dualities of Deformed $\mathcal{N=2}$ SCFTs from Link Monodromy on
D3-brane States | dualities of deformed $\mathcal{n=2}$ scfts from link monodromy on d3-brane states | brane dually deformations mathcal superconformal massless monopoles dyons. arise intersection seven brane cuts sphere surrounding intersection. loops sphere yielding monodromy junction brane subsequently quotienting monodromy. reduces differing flavor algebras mathcal flavor duality projects yielding mathcal superconformal brane. deformation argyres douglas retains flavor exhibits neutral flavor triplet comprised dyon monopole junctions. duality argue monodromy projection imposed away conformal brane exhibit confinement dyons monopoles. mathematical counterparts companion pages | non_dup | [] |
84092002 | 10.1007/JHEP09(2017)136 | We present the exact solution for the scattering problem in the flat space
Jackiw-Teitelboim (JT) gravity coupled to an arbitrary quantum field theory. JT
gravity results in a gravitational dressing of field theoretical scattering
amplitudes. The exact expression for the dressed $S$-matrix was previously
known as a solvable example of a novel UV asymptotic behavior, dubbed
asymptotic fragility. This dressing is equivalent to the $T\bar{T}$ deformation
of the initial quantum field theory. JT gravity coupled to a single massless
boson provides a promising action formulation for an integrable approximation
to the worldsheet theory of confining strings in 3D gluodynamics. We also
derive the dressed $S$-matrix as a flat space limit of the near $AdS_2$
holography. We show that in order to preserve the flat space unitarity the
conventional Schwarzian dressing of boundary correlators needs to be slightly
extended. Finally, we propose a new simple expression for flat space amplitudes
of massive particles in terms of correlators of holographic CFT's.Comment: 39+7 pages; v2: notation clarified, typos corrected, references
added; v3: bbl file updated; v4: one more typo fixe | Asymptotic Fragility, Near $AdS_2$ Holography and $T\bar{T}$ | asymptotic fragility, near $ads_2$ holography and $t\bar{t}$ | jackiw teitelboim theory. gravitational dressing amplitudes. dressed solvable asymptotic dubbed asymptotic fragility. dressing deformation theory. massless boson promising formulation integrable worldsheet confining strings gluodynamics. derive dressed holography. preserve unitarity schwarzian dressing correlators extended. propose amplitudes massive correlators holographic pages notation clarified typos corrected file updated typo fixe | non_dup | [] |
93945294 | 10.1007/JHEP09(2017)137 | In $SU(N)$ gauge theory, it is argued recently that there exists a "mixed
anomaly" between the CP symmetry and the 1-form $\mathbb{Z}_N$ symmetry at
$\theta=\pi$, and the anomaly matching requires CP to be spontaneously broken
at $\theta=\pi$ if the system is in the confining phase. In this paper, we
elaborate on this discussion by examining the large volume behavior of the
partition functions of the $SU(N)/\mathbb{Z}_N$ theory on $T^4$ a la 't Hooft.
The periodicity of the partition function in $\theta$, which is not $2\pi$ due
to fractional instanton numbers, suggests the presence of a phase transition at
$\theta=\pi$. We propose lattice simulations to study the distribution of the
instanton number in $SU(N)/\mathbb{Z}_N$ theories. A characteristic shape of
the distribution is predicted when the system is in the confining phase. The
measurements of the distribution may be useful in understanding the phase
structure of the theory.Comment: 18 pages, 1 figure, reference added, typo fixe | $\theta=\pi$ in $SU(N)/\mathbb{Z}_N$ gauge theories | $\theta=\pi$ in $su(n)/\mathbb{z}_n$ gauge theories | argued anomaly mathbb theta anomaly matching spontaneously broken theta confining phase. elaborate examining partition mathbb hooft. periodicity partition theta fractional instanton theta propose instanton mathbb theories. confining phase. pages typo fixe | non_dup | [] |
83837702 | 10.1007/JHEP09(2017)138 | Bird, et. al. and Sasaki, et. al. have recently proposed the intriguing
possibility that the black holes detected by LIGO could be all or part of the
cosmological dark matter. This offers an alternative to WIMPs and axions, where
dark matter could be comprised solely of Standard Model particles. The mass
range lies within an observationally viable window and the predicted merger
rate can be tested by future LIGO observations. In this paper, we argue that
non-thermal histories favor production of black holes near this mass range --
with heavier ones unlikely to form in the early universe and lighter black
holes being diluted through late-time entropy production. We discuss how this
prediction depends on the primordial power spectrum, the likelihood of black
hole formation, and the underlying model parameters. We find the prediction for
the preferred mass range to be rather robust assuming a blue spectral index
less than two. We consider the resulting relic density in black holes, and
using recent observational constraints, establish whether they could account
for all of the dark matter today.Comment: 8 pages, 3 figure | A Preferred Mass Range for Primordial Black Hole Formation and Black
Holes as Dark Matter Revisited | a preferred mass range for primordial black hole formation and black holes as dark matter revisited | bird sasaki intriguing holes ligo cosmological matter. offers wimps axions comprised solely particles. lies observationally viable window merger ligo observations. argue histories favor holes heavier unlikely universe lighter holes diluted production. primordial likelihood parameters. preferred robust two. relic holes observational establish pages | non_dup | [] |
83861730 | 10.1007/JHEP09(2017)139 | Here we shall show that there is no other instability for the
Einstein-Gauss-Bonnet-anti-de Sitter (AdS) black holes, than the eikonal one
and consider the features of the quasinormal spectrum in the stability sector
in detail. The obtained quasinormal spectrum consists from the two essentially
different types of modes: perturbative and non-perturbative in the Gauss-Bonnet
coupling $\alpha$. The sound and hydrodynamic modes of the perturbative branch
can be expressed through their Schwazrschild-AdS limits by adding a linear in
$\alpha$ correction to the damping rates: $\omega \approx Re(\omega_{SAdS}) -
Im(\omega_{SAdS}) (1 - \alpha \cdot ((D+1) (D-4) /2 R^2)) i$, where $R$ is the
AdS radius. The non-perturbative branch of modes consists of purely imaginary
modes, whose damping rates unboundedly increase when $\alpha$ goes to zero.
When the black hole radius is much larger than the anti-de Sitter radius $R$,
the regime of the black hole with planar horizon (black brane) is reproduced.
If the Gauss-Bonnet coupling $\alpha$ (or used in holography $\lambda_{GB}$) is
not small enough, then the black holes and branes suffer from the instability,
so that the holographic interpretation of perturbation of such black holes
becomes questionable, as, for example, the claimed viscosity bound violation in
the higher derivative gravity. For example, $D=5$ black brane is unstable at
$|\lambda_{GB}|>1/8$ and has anomalously large relaxation time when approaching
the threshold of instability.Comment: 22 pages, JHEP styl | Quasinormal modes of Gauss-Bonnet-AdS black holes: towards holographic
description of finite coupling | quasinormal modes of gauss-bonnet-ads black holes: towards holographic description of finite coupling | instability einstein gauss bonnet sitter holes eikonal quasinormal detail. quasinormal essentially perturbative perturbative gauss bonnet alpha sound hydrodynamic perturbative branch schwazrschild adding alpha damping omega approx omega sads omega sads alpha cdot radius. perturbative branch purely imaginary damping unboundedly alpha goes zero. sitter planar horizon brane reproduced. gauss bonnet alpha holography lambda holes branes suffer instability holographic perturbation holes questionable claimed viscosity violation gravity. brane unstable lambda anomalously relaxation approaching pages jhep styl | non_dup | [] |
73961112 | 10.1007/JHEP09(2017)140 | The spectrum of planar N=6 superconformal Chern-Simons theory, dual to type
IIA superstring theory on $AdS_4 \times CP^3$, is accessible at finite coupling
using integrability. Starting from the results of [arXiv:1403.1859], we study
in depth the basic integrability structure underlying the spectral problem, the
Quantum Spectral Curve. The new results presented in this paper open the way to
the quantitative study of the spectrum for arbitrary operators at finite
coupling. Besides, we show that the Quantum Spectral Curve is embedded into a
novel kind of Q-system, which reflects the OSp(4|6) symmetry of the theory and
leads to exact Bethe Ansatz equations. The discovery of this algebraic
structure, more intricate than the one appearing in the $AdS_5/CFT_4$ case,
could be a first step towards the extension of the method to $AdS_3/CFT_2$.Comment: 43 + 27 pages, 7 figures. v4: text improved, more details and App D
included. This is the same as the published version JHEP09(2017)140, with
small typos corrected in App | The full Quantum Spectral Curve for $AdS_4/CFT_3$ | the full quantum spectral curve for $ads_4/cft_3$ | planar superconformal chern simons superstring accessible integrability. integrability curve. coupling. besides embedded kind reflects bethe ansatz equations. discovery algebraic intricate appearing .comment pages figures. included. jhep typos corrected | non_dup | [] |
83844109 | 10.1007/JHEP09(2017)141 | We present BPS black hole solutions in a four-dimensional $\mathcal{N}=2$
supergravity with an abelian dyonic gauging of the universal hypermultiplet
moduli space. This supergravity arises as the SU(3)-invariant subsector in the
reduction of massive IIA supergravity on a six-sphere. The solutions are
supported by non-constant scalar, vector and tensor fields and interpolate
between a unique $\textrm{AdS}_{2} \,\times\, \textrm{H}^2$ geometry in the
near-horizon region and the domain-wall DW$_{4}$ (four-dimensional) description
of the D2-brane at the boundary. Some special solutions with charged AdS$_{4}$
or non-relativistic scaling behaviours in the ultraviolet are also presented.Comment: 20 pages, 4 figures and 1 appendix. v2: New appendix, comments and
references added, published versio | BPS black holes from massive IIA on S$^6$ | bps black holes from massive iia on s$^6$ | mathcal supergravity abelian dyonic gauging universal hypermultiplet moduli space. supergravity arises subsector massive supergravity sphere. interpolate textrm textrm horizon brane boundary. relativistic behaviours ultraviolet pages appendix. comments versio | non_dup | [] |
73354246 | 10.1007/JHEP09(2017)142 | We investigate the ground state energies of vector $\rho^{\pm}$ and $K^{\pm
*}$ mesons depending on the magnetic field value in the $SU(3)$ lattice gauge
theory. It has been shown that the energy of a vector particle depends on its
spin projection on the field axis. The magnetic dipole polarizability and
hyperpolarizabilities give significant contributions to the energy value which
prevents the formation of the charged vector meson condensate at high magnetic
fields. We calculate the g-factor of $\rho^{\pm}$ and $K^{\pm*}$ mesons and the
dipole magnetic polarizability of $\rho^{\pm}$ mesons.Comment: 26 pages, 13 figure | Determination of the properties of vector mesons in external magnetic
field by Quenched $SU(3)$ Lattice QCD | determination of the properties of vector mesons in external magnetic field by quenched $su(3)$ lattice qcd | mesons theory. projection axis. dipole polarizability hyperpolarizabilities prevents meson condensate fields. mesons dipole polarizability pages | non_dup | [] |
86421940 | 10.1007/JHEP09(2017)143 | We systematically construct ghost-free higher-derivative actions of Abelian
vector supermultiplets in four-dimensional ${\cal N}=1$ global supersymmetric
theories. After giving a simple example which illustrates that a naive
introduction of a higher-derivative term gives rise to a ghost, we discuss
possible building blocks for a ghost-free action and explicitly show that their
bosonic parts have no ghost mode and the auxiliary field $\boldsymbol{D}$ does
not propagate. Higher-derivative terms yield higher powers of the auxiliary
field $\boldsymbol{D}$ in the actions, and the D-term equations of motion
consequently admit multiple solutions in general. We confirm that the
well-known supersymmetric Dirac-Born-Infeld action falls into this class. We
further give another example in which the standard quadratic kinetic term
(Maxwell term) is corrected by a quartic term of the field strength. We also
discuss possible couplings to matter fields and a deformed D-term potential.Comment: 17 pages; v3: references added, published versio | Ghost-free vector superfield actions in supersymmetric higher-derivative
theories | ghost-free vector superfield actions in supersymmetric higher-derivative theories | systematically ghost abelian supermultiplets supersymmetric theories. giving illustrates naive ghost blocks ghost explicitly bosonic ghost auxiliary boldsymbol propagate. powers auxiliary boldsymbol admit general. confirm supersymmetric dirac born infeld falls class. quadratic maxwell corrected quartic strength. couplings deformed pages versio | non_dup | [] |
86420787 | 10.1007/JHEP09(2017)145 | The so-called $\Gamma\Gamma$-form of the gravitational Lagrangian, long known
to provide its most compact expression as well as the most efficient generation
of the graviton vertices, is taken as the starting point for discussing General
Relativity as a theory of the self-interacting graviton. A straightforward but
general method of converting to a covariant formulation by the introduction of
a reference metric is given. It is used to recast the Einstein field equation
as the equation of motion of a spin-2 particle interacting with the canonical
energy-momentum tensor symmetrized by the standard Belinfante method applicable
to any field carrying nonzero spin. This represents the graviton field equation
in a form complying with the precepts of standard field theory. It is then
shown how representations based on other, at face value completely unrelated
definitions of energy-momentum (pseudo)tensors are all related by the addition
of appropriate superpotential terms. Specifically, the superpotentials are
explicitly constructed which connect to: i) the common definition consisting
simply of the nonlinear part of the Einstein tensor; ii) the Landau-Lifshitz
definition.Comment: 15 pages, latex, typos corrected, references added, published versio | On the `simple' form of the gravitational action and the
self-interacting graviton | on the `simple' form of the gravitational action and the self-interacting graviton | gamma gamma gravitational lagrangian graviton discussing relativity interacting graviton. straightforward converting covariant formulation given. recast einstein interacting canonical symmetrized belinfante applicable carrying nonzero spin. graviton complying precepts theory. representations unrelated definitions pseudo tensors superpotential terms. superpotentials explicitly connect consisting einstein landau lifshitz pages latex typos corrected versio | non_dup | [] |
86419139 | 10.1007/JHEP09(2017)146 | We employ the Noether procedure to derive a general formula for the radially
conserved heat current in AdS planar black holes with certain transverse and
traceless perturbations, for a general class of gravity theories. For Einstein
gravity, the general higher-order Lovelock gravities and also a class of
Horndeski gravities, we derive the boundary stress tensor and show that the
resulting boundary heat current matches precisely the bulk Noether current.Comment: Latex, 27 pages, typos corrected, comments added, references adde | Holographic Heat Current as Noether Current | holographic heat current as noether current | employ noether derive radially conserved planar holes traceless perturbations theories. einstein lovelock gravities horndeski gravities derive matches precisely noether latex pages typos corrected comments adde | non_dup | [] |
83835858 | 10.1007/JHEP09(2017)147 | Starting from 6D superconformal field theories (SCFTs) realized via F-theory,
we show how reduction on a circle leads to a uniform perspective on the phase
structure of the resulting 5D theories, and their possible conformal fixed
points. Using the correspondence between F-theory reduced on a circle and
M-theory on the corresponding elliptically fibered Calabi--Yau threefold, we
show that each 6D SCFT with minimal supersymmetry directly reduces to a
collection of between one and four 5D SCFTs. Additionally, we find that in most
cases, reduction of the tensor branch of a 6D SCFT yields a 5D generalization
of a quiver gauge theory. These two reductions of the theory often correspond
to different phases in the 5D theory which are in general connected by a
sequence of flop transitions in the extended Kahler cone of the Calabi--Yau
threefold. We also elaborate on the structure of the resulting conformal fixed
points, and emergent flavor symmetries, as realized by M-theory on a canonical
singularity.Comment: v2: 45 pages, 7 figures, references and clarifications adde | 6D SCFTs and Phases of 5D Theories | 6d scfts and phases of 5d theories | superconformal scfts realized circle perspective conformal points. correspondence circle elliptically fibered calabi threefold scft supersymmetry reduces scfts. additionally branch scft generalization quiver theory. reductions flop kahler cone calabi threefold. elaborate conformal emergent flavor symmetries realized canonical pages clarifications adde | non_dup | [] |
83868994 | 10.1007/JHEP09(2017)148 | We construct a large class of conformal interfaces between two-dimensional
c=1 conformal field theories describing compact free bosons and their Z_2
orbifolds. The interfaces are obtained by constructing boundary states in the
corresponding c=2 product theories and applying the unfolding procedure. We
compute the fusion products for all of these defects, and identify the
invertible topological interfaces associated to global symmetries, the
interfaces corresponding to marginal deformations, and the interfaces which map
the untwisted sector of an orbifold to the invariant states of the parent
theory.Comment: 28 pages + 15 pages of appendix, v2 added some references and
comment | Conformal interfaces between free boson orbifold theories | conformal interfaces between free boson orbifold theories | conformal interfaces conformal describing bosons orbifolds. interfaces constructing unfolding procedure. fusion defects invertible topological interfaces symmetries interfaces marginal deformations interfaces untwisted orbifold parent pages pages comment | non_dup | [] |
83865239 | 10.1007/JHEP09(2017)149 | We give a holographic description of global conformal blocks in two
dimensional conformal field theory on the sphere and on the torus. We show that
the conformal blocks for one-point functions on the torus can be written as
Witten diagrams in thermal AdS. This is accomplished by deriving a general
conformal Casimir equation for global conformal blocks, and showing that Witten
diagrams obey the same equation. We study the semi-classical limit of n-point
conformal blocks, and show that these equal the action of a network of bulk
world-lines obeying appropriate geodesic equations. We give an alternate
description in the Chern-Simons formulation of 3D gravity, where the conformal
blocks are described by networks of Wilson lines, and argue that these
formulations are equivalent.Comment: 32 pages, 6 figure | Witten Diagrams for Torus Conformal Blocks | witten diagrams for torus conformal blocks | holographic conformal blocks conformal sphere torus. conformal blocks torus witten diagrams ads. accomplished deriving conformal casimir conformal blocks witten diagrams obey equation. conformal blocks obeying geodesic equations. alternate chern simons formulation conformal blocks wilson argue formulations pages | non_dup | [] |
84329499 | 10.1007/JHEP09(2017)150 | We use AdS/CFT holography to study how a strongly-coupled plasma polarizes
when the geometry where it resides is not flat. We compute the linear-response
polarization coefficients, which are directly related to the static two-point
correlation function of the stress-energy tensor. In the gravitational dual
description, these parameters correspond to the tidal deformation
coefficients---the Love numbers---of a black brane. We also compute the
coefficients of static electric polarization of the plasma.Comment: 23 pages, 9 figures. v2: Added references and acknowledgments. v3:
Minor changes, references added (and retained). Matches published versio | Geometric polarization of plasmas and Love numbers of AdS black branes | geometric polarization of plasmas and love numbers of ads black branes | holography polarizes resides flat. tensor. gravitational tidal deformation love brane. pages figures. acknowledgments. minor retained matches versio | non_dup | [] |
86414184 | 10.1007/JHEP09(2017)151 | We investigate the robustness of the Araki-Lieb inequality in a
two-dimensional (2D) conformal field theory (CFT) on torus. The inequality
requires that $\Delta S=S(L)-|S(L-\ell)-S(\ell)|$ is nonnegative, where $S(L)$
is the thermal entropy and $S(L-\ell)$, $S(\ell)$ are the entanglement
entropies. Holographically there is an entanglement plateau in the BTZ black
hole background, which means that there exists a critical length such that when
$\ell \leq \ell_c$ the inequality saturates $\Delta S=0$. In thermal AdS
background, the holographic entanglement entropy leads to $\Delta S=0$ for
arbitrary $\ell$. We compute the next-to-leading order contributions to $\Delta
S$ in the large central charge CFT at both high and low temperatures. In both
cases we show that $\Delta S$ is strictly positive except for $\ell = 0$ or
$\ell = L$. This turns out to be true for any 2D CFT. In calculating the single
interval entanglement entropy in a thermal state, we develop new techniques to
simplify the computation. At a high temperature, we ignore the finite size
correction such that the problem is related to the entanglement entropy of
double intervals on a complex plane. As a result, we show that the leading
contribution from a primary module takes a universal form. At a low
temperature, we show that the leading thermal correction to the entanglement
entropy from a primary module does not take a universal form, depending on the
details of the theory.Comment: 32 pages, 8 figures; V2, typos corrected, published versio | Corrections to holographic entanglement plateau | corrections to holographic entanglement plateau | robustness araki lieb inequality conformal torus. inequality delta nonnegative entanglement entropies. holographically entanglement plateau inequality saturates delta holographic entanglement delta delta temperatures. delta strictly turns cft. calculating entanglement simplify computation. ignore entanglement intervals plane. module universal form. entanglement module universal pages typos corrected versio | non_dup | [] |
83857493 | 10.1007/JHEP09(2017)152 | We show that, in all metric theories of gravity with a general covariant
action, gravity couples to the gravitational energy-momentum tensor in the same
way it couples to the matter energy-momentum tensor order by order in the weak
field approximation around flat spacetime. We discuss the relation of this
property to the Strong Equivalence Principle. We also study the gauge
transformation properties of the gravitational energy-momentum tensor.Comment: Additional resulting the gauge transformation of the gravitational
energy-momentum tensor and references added. 18 pages, no figure | Higher order gravities and the Strong Equivalence Principle | higher order gravities and the strong equivalence principle | covariant couples gravitational couples spacetime. equivalence principle. gravitational gravitational added. pages | non_dup | [] |
84090691 | 10.1007/JHEP09(2017)153 | We calculate the strong isospin breaking and QED corrections to meson masses
and the hadronic vacuum polarization in an exploratory study on a
$64\times24^3$ lattice with an inverse lattice spacing of $a^{-1}=1.78$ GeV and
an isospin symmetric pion mass of $m_\pi=340$ MeV. We include QED in an
electro-quenched setup using two different methods, a stochastic and a
perturbative approach. We find that the electromagnetic correction to the
leading hadronic contribution to the anomalous magnetic moment of the muon is
smaller than $1\%$ for the up quark and $0.1\%$ for the strange quark, although
it should be noted that this is obtained using unphysical light quark masses.
In addition to the results themselves, we compare the precision which can be
reached for the same computational cost using each method. Such a comparison is
also made for the meson electromagnetic mass-splittings.Comment: 49 pages, 20 figure | Isospin breaking corrections to meson masses and the hadronic vacuum
polarization: a comparative study | isospin breaking corrections to meson masses and the hadronic vacuum polarization: a comparative study | isospin breaking meson hadronic exploratory spacing isospin pion mev. electro quenched setup stochastic perturbative approach. electromagnetic hadronic anomalous moment muon strange unphysical masses. precision reached method. meson electromagnetic pages | non_dup | [] |
83867081 | 10.1007/JHEP09(2017)155 | The low-energy expansion of one-loop amplitudes in type II string theory
generates a series of world-sheet integrals whose integrands can be represented
by world-sheet Feynman diagrams. These integrands are modular invariant and
understanding the structure of the action of the modular Laplacian on them is
important for determining their contribution to string scattering amplitudes.
In this paper we study a particular infinite family of such integrands
associated with three-loop scalar vacuum diagrams of tetrahedral topology and
find closed forms for the action of the Laplacian. We analyse the possible
eigenvalues and degeneracies of the Laplace operator by group- and
representation-theoretic means.Comment: 40 pages. v2: reference added. Version published in JHE | Tetrahedral modular graph functions | tetrahedral modular graph functions | amplitudes generates sheet integrals integrands sheet feynman diagrams. integrands modular modular laplacian determining amplitudes. infinite integrands diagrams tetrahedral topology laplacian. analyse eigenvalues degeneracies laplace theoretic pages. added. | non_dup | [] |
84327377 | 10.1007/JHEP09(2017)157 | We utilize machine learning to study the string landscape. Deep data dives
and conjecture generation are proposed as useful frameworks for utilizing
machine learning in the landscape, and examples of each are presented. A
decision tree accurately predicts the number of weak Fano toric threefolds
arising from reflexive polytopes, each of which determines a smooth F-theory
compactification, and linear regression generates a previously proven
conjecture for the gauge group rank in an ensemble of $\frac43 \times 2.96
\times 10^{755}$ F-theory compactifications. Logistic regression generates a
new conjecture for when $E_6$ arises in the large ensemble of F-theory
compactifications, which is then rigorously proven. This result may be relevant
for the appearance of visible sectors in the ensemble. Through conjecture
generation, machine learning is useful not only for numerics, but also for
rigorous results.Comment: 35 pages, 4 figure | Machine Learning in the String Landscape | machine learning in the string landscape | utilize machine landscape. dives conjecture frameworks utilizing machine landscape presented. accurately predicts fano toric threefolds arising reflexive polytopes determines compactification generates proven conjecture ensemble frac compactifications. logistic generates conjecture arises ensemble compactifications rigorously proven. appearance visible sectors ensemble. conjecture machine numerics rigorous pages | non_dup | [] |
83851608 | 10.1007/JHEP09(2017)158 | General analyses of $B$-physics processes beyond the Standard Model require
accounting for operator mixing in the renormalization-group evolution from the
matching scale down to the typical scale of $B$ physics. For this purpose the
anomalous dimensions of the full set of local dimension-six operators beyond
the Standard Model are needed. We present here for the first time a complete
and non-redundant set of dimension-six operators relevant for $B$-meson mixing
and decay, together with the complete one-loop anomalous dimensions in QCD and
QED. These results are an important step towards the automation of general New
Physics analyses.Comment: 37 pages, 3 figures + ancillary mathematica package. Version
published in JHEP, with a corrected list of lepton-number-violating operator | B physics Beyond the Standard Model at One Loop: Complete
Renormalization Group Evolution below the Electroweak Scale | b physics beyond the standard model at one loop: complete renormalization group evolution below the electroweak scale | accounting renormalization matching physics. anomalous needed. redundant meson anomalous qed. automation pages ancillary mathematica package. jhep corrected lepton violating | non_dup | [] |
83864775 | 10.1007/JHEP09(2017)159 | Motivated by the possibility of enhancing dark matter (DM) self-interaction
cross-section $\sigma_{\rm self}$, we have revisited the issue of DM
annihilation through a Breit-Wigner resonance. In this case thermally averaged
annihilation cross-section has strong temperature dependence, whereas elastic
scattering of DM on the thermal bath particles is suppressed. This leads to the
early kinetic decoupling of DM and an interesting interplay in the evolution of
DM density and temperature that can be described by a set of coupled Boltzmann
equations. The standard Breit-Wigner parametrization of a resonance propagator
is also corrected by including momentum dependence of the resonance width. It
has been shown that this effects may change predictions of DM relic density by
more than order of magnitude in some regions of the parameter space. Model
independent discussion is illustrated within a theory of Abelian vector dark
matter. The model assumes extra $U(1)$ symmetry group factor and an additional
complex Higgs field needed to generate a mass for the dark vector boson, which
provides an extra neutral Higgs boson $h_2$. We discuss the resonance
amplification of $\sigma_{\rm self}$. It turns out that if DM abundance is
properly reproduced, the Fermi-LAT data favor heavy DM and constraint the
enhancement of $\sigma_{\rm self}$ to the range, which cannot provide a
solution to the small-scale structure problems.}Comment: 17 pages, 5 figures, v2: minor changes in text, BBN and CMB
constraints adde | Resonance enhancement of dark matter interactions: the case for early
kinetic decoupling and velocity dependent resonance width | resonance enhancement of dark matter interactions: the case for early kinetic decoupling and velocity dependent resonance width | motivated enhancing sigma revisited annihilation breit wigner resonance. thermally averaged annihilation elastic bath suppressed. decoupling interplay boltzmann equations. breit wigner parametrization propagator corrected width. relic space. illustrated abelian matter. assumes extra boson extra neutral boson amplification sigma turns abundance properly reproduced fermi favor enhancement sigma problems. comment pages minor adde | non_dup | [] |
83833247 | 10.1007/JHEP09(2017)160 | We study simple effective models of fermionic WIMP dark matter, where the
dark matter candidate is a mixture of a Standard Model singlet and an n-plet of
SU(2) with n >= 3, stabilized by a discrete symmetry. The dark matter mass is
assumed to be around the electroweak scale, and the mixing is generated by
higher-dimensional operators, with a cutoff scale > 1 TeV. For appropriate
values of the mass parameters and the mixing we find that the observed dark
matter relic density can be generated by coannihilation. Direct detection
experiments have already excluded large parts of the parameter space, and the
next-generation experiments will further constrain these models.Comment: 25 pages, 7 figures; v2: references and plots updated, minor
corrections, conclusions unchange | Well-tempered n-plet dark matter | well-tempered n-plet dark matter | fermionic wimp candidate mixture singlet plet stabilized symmetry. electroweak cutoff tev. relic coannihilation. excluded constrain pages plots updated minor unchange | non_dup | [] |
146473461 | 10.1007/JHEP09(2018)004 | The observation of very high energy neutrino events at IceCube has grasped a
lot of attention in the fields of both astrophysics and particle physics. It
has been speculated that these high energy neutrinos might originate either
from purely conventional astrophysical sources or from the late decay of a
super heavy (PeV scale) dark matter (DM) particle. In order for decaying DM to
be a dominant source of the IceCube high-energy neutrinos, it would require an
unusually suppressed value of the coupling of DM to neutrinos. We attempt to
explain this small coupling in the context of an $R$-parity conserving minimal
supergravity model which has right-handed neutrino superfields. With the main
assumptions of super-partner masses at the PeV scale and also a reheating
temperature not much larger than the PeV scale, we find in our model several
natural order-of-magnitude "miracles", (i) the gravitino is produced via
freeze-in as a DM candidate with the correct relic density (ii) the
right-handed (RH) sneutrino makes up only a tiny fraction ($10^{-6})$, of the
present day energy density of the universe, yet its decay lifetime to the
gravitino and neutrinos is such that it naturally predicts the right
order-of-magnitude for the IceCube neutrino flux. The long lifetime of the RH
sneutrino is explained by the existence of a global $R$-symmetry which is only
broken due to supersymmetry breaking effects. Our model also predicts a flux of
100 TeV gamma rays from the decaying RH sneutrino which are within the current
observational constraints.Comment: v2: 34 pages, 6 figures, Journal version (published in JHEP | PeV scale Supersymmetry breaking and the IceCube neutrino flux | pev scale supersymmetry breaking and the icecube neutrino flux | icecube grasped astrophysics physics. speculated neutrinos originate purely astrophysical super particle. decaying icecube neutrinos unusually suppressed neutrinos. attempt parity conserving supergravity handed superfields. assumptions super partner reheating miracles gravitino freeze candidate relic handed sneutrino tiny universe lifetime gravitino neutrinos naturally predicts icecube flux. lifetime sneutrino broken supersymmetry breaking effects. predicts gamma rays decaying sneutrino observational pages jhep | non_dup | [] |
29561281 | 10.1007/JHEP09(2018)009 | We study fermions in an electrically-probed and asymptotically anti-de Sitter
Schwarzschild spacetime which interact via novel chiral symmetry-preserving
interactions. Computing the dual fermion two-point correlator, we show that
these bulk interactions anisotropically gap Fermi surfaces of the boundary
spectrum. Consequently, the interactions we devise provide holographic models
for Fermi arcs seen ubiquitously in the pseudogap regime of the cuprates. Our
interactions are modifications of the chiral symmetry-breaking Pauli coupling,
which has previously been proposed as the holographic realization of Mott
physics. The onset of Mott insulation and pseudogap physics are respectively
discussed in the context of bulk chiral and boundary parity symmetry breaking,
and the Mott transition is interpreted as a deconfinement transition of
non-Fermi liquid excitations.Comment: 8 pages, 2 figure | Evolution of Holographic Fermi Arcs from a Mott Insulator | evolution of holographic fermi arcs from a mott insulator | fermions electrically probed asymptotically sitter schwarzschild spacetime interact chiral preserving interactions. fermion correlator anisotropically fermi spectrum. devise holographic fermi arcs ubiquitously pseudogap cuprates. modifications chiral breaking pauli holographic realization mott physics. onset mott insulation pseudogap chiral parity breaking mott interpreted deconfinement fermi pages | non_dup | [] |
162911376 | 10.1007/JHEP09(2018)019 | Energy and momentum conservation in the context of a type II, purely transmitting, defect, within a single scalar relativistic two-dimensional field theory, places a severe constraint not only on the nature of the defect but also on the potentials for the scalar fields to either side of it. The constraint is of an unfamiliar type since it requires the Poisson Bracket of the defect contributions to energy and momentum with respect to the defect discontinuity and its conjugate to be balanced by the potential difference across the defect. It is shown that the only solutions to the constraint correspond to the known integrable field theories | Type II defects revisited. | type ii defects revisited. | conservation purely transmitting defect relativistic places defect potentials unfamiliar poisson bracket defect defect discontinuity conjugate balanced defect. integrable | non_dup | [] |
146475826 | 10.1007/JHEP09(2018)020 | We derive a Wilson coefficient of a CP-violating purely gluonic dimension-6
operator called the Weinberg operator ($GG\tilde{G}$) generated by a scalar and
two fermions at the two-loop level. We do not specify the representation of
SU(3)$_c$ for the scalar and the fermions, and thus our result can be applied
to a variety of models beyond the standard model. We estimate the nucleon EDMs
induced by the Weinberg operator in some examples and discuss the importance of
measuring EDMs. It is found that future measurements of the EDMs can probe
physics at higher energy scale beyond the reach of collider experiments.Comment: 22 pages, 7 figures; v2: version accepted by JHEP; v3: Eq. (4.2) is
added, Table 1 is extende | Model independent evaluation of the Wilson coefficient of the Weinberg
operator in QCD | model independent evaluation of the wilson coefficient of the weinberg operator in qcd | derive wilson violating purely gluonic weinberg tilde fermions level. specify fermions model. nucleon edms weinberg measuring edms. edms collider pages jhep extende | non_dup | [] |
93951767 | 10.1007/JHEP09(2018)034 | Physical process version of the first law of black hole mechanics relates the
change in entropy of a perturbed Killing horizon, between two asymptotic cross
sections, to the matter flow into the horizon. Here, we study the mathematical
structure of the physical process first law for a general diffeomorphism
invariant theory of gravity. We analyze the effect of ambiguities in the Wald's
definition of entropy on the physical process first law. We show that for
linearized perturbations, the integrated version of the physical process law,
which determines the change of entropy between two asymptotic cross-sections,
is independent of these ambiguities. In case of entropy change between two
intermediate cross sections of the horizon, we show that it inherits additional
contributions, which coincide with the membrane energy associated with the
horizon fluid. Using this interpretation, we write down a physical process
first law for entropy change between two arbitrary non-stationary cross
sections of the horizon for both general relativity and Lanczos-Lovelock
gravity.Comment: v3; Minor revision; Published versio | On the physical process first law for dynamical black holes | on the physical process first law for dynamical black holes | mechanics relates perturbed killing horizon asymptotic horizon. mathematical diffeomorphism gravity. analyze ambiguities wald law. linearized perturbations determines asymptotic ambiguities. horizon inherits coincide horizon fluid. stationary horizon relativity lanczos lovelock minor revision versio | non_dup | [] |
162911525 | 10.1007/JHEP09(2018)035 | We provide a precise description of the Higgs boson transverse momentum distribution including top and bottom quark contributions, that is valid for transverse momenta in the range mb ≲ p⊥ ≲ mt, where mb and mt are the bottom and top quark masses. This description is based on a combination of fixed next-to-leading order (NLO) results with next-to-next-to-leading logarithmic (NNLL) transverse momentum resummation. We show that ambiguities in the resummation procedure for the b-quark loops are of the same order as the related fixed-order uncertainties. We conclude that the current uncertainty in the top-bottom interference contribution to the Higgs transverse momentum spectrum is O(20%) | Bottom-quark effects in Higgs production at intermediate transverse momentum. | bottom-quark effects in higgs production at intermediate transverse momentum. | precise boson valid momenta masses. logarithmic nnll resummation. ambiguities resummation loops uncertainties. interference | non_dup | [] |
129359452 | 10.1007/JHEP09(2018)039 | We elaborate on the low-energy effective action of $6D,\,{\cal N}=(1,1)$
supersymmetric Yang-Mills (SYM) theory in the ${\cal N}=(1,0)$ harmonic
superspace formulation. The theory is described in terms of analytic ${\cal
N}=(1,0)$ gauge superfield $V^{++}$ and analytic $\omega$-hypermultiplet, both
in the adjoint representation of gauge group. The effective action is defined
in the framework of the background superfield method ensuring the manifest
gauge invariance along with manifest ${\cal N}=(1,0)$ supersymmetry. We
calculate leading contribution to the one-loop effective action using the
on-shell background superfields corresponding to the option when gauge group
$SU(N)$ is broken to $SU(N-1)\times U(1)\subset SU(N)$. In the bosonic sector
the effective action involves the structure $\sim \frac{F^4}{X^2}$, where $F^4$
is a monomial of the fourth degree in an abelian field strength $F_{MN}$ and
$X$ stands for the scalar fields from the $\omega$-hypermultiplet. It is
manifestly demonstrated that the expectation values of the hypermultiplet
scalar fields play the role of a natural infrared cutoff.Comment: 1+14 pages, text essentially remade, some references added, title is
slightly correcte | Leading low-energy effective action in $6D$, ${\cal N}=(1,1)$ SYM theory | leading low-energy effective action in $6d$, ${\cal n}=(1,1)$ sym theory | elaborate supersymmetric mills harmonic superspace formulation. analytic superfield analytic omega hypermultiplet adjoint group. superfield ensuring manifest invariance manifest supersymmetry. superfields option broken bosonic involves frac monomial fourth abelian stands omega hypermultiplet. manifestly expectation hypermultiplet infrared pages essentially remade title correcte | non_dup | [] |
146475936 | 10.1007/JHEP09(2018)059 | We study popular scalar extensions of the Standard Model, namely the singlet
extension, the 2-Higgs doublet model (2HDM) and its extension by a singlet
scalar. We focus on the contributions of the added scalars to the anomalous
magnetic moment of the muon, $(g-2)_\mu$ in the presence of CP-violation, and
the electric dipole moment of the electron ($e$EDM) in these models. In the
absence of CP-violation, CP-even and CP-odd scalars contribute with an opposite
sign to the anomalous magnetic moment of the muon and as a result these models
generally require very light scalars to explain the observed discrepancy in
$(g-2)_\mu$. We study the effect of CP-violation on the anomalous magnetic
moment of the muon and its compatibility with the $e$EDM constraints. We show
that given the current status of the global set of constraints applied on all
values of $\cot\beta$, in the CP-violating scalar extensions, there exist no
viable parameter space in agreement with both $a_\mu$ and $e$EDM bounds.Comment: Version appearing in JHE | Singlet scalar and 2HDM extensions of the Standard Model: CP-violation
and constraints from $(g-2)_\mu$ and $e$EDM | singlet scalar and 2hdm extensions of the standard model: cp-violation and constraints from $(g-2)_\mu$ and $e$edm | popular extensions singlet doublet singlet scalar. scalars anomalous moment muon violation dipole moment models. violation scalars opposite anomalous moment muon scalars discrepancy violation anomalous moment muon compatibility constraints. beta violating extensions viable appearing | non_dup | [] |
162911630 | 10.1007/JHEP09(2018)066 | We provide a refined interpretation of a gravitational Wilson line in AdS3 in terms of Ishibashi states in the dual CFT2. Our strategy is to give a method to evaluate the Wilson line that accounts for all the information contained in the representation, and clarify the role of boundary conditions at the endpoints of the line operator. This gives a novel way to explore and reconstruct the local bulk dynamics which we discuss. We also compare our findings with other interpretations of Ishibashi states in AdS3/CFT2 | Wilson lines and Ishibashi states in AdS3/CFT2. | wilson lines and ishibashi states in ads3/cft2. | refined gravitational wilson ishibashi wilson accounts clarify endpoints operator. explore reconstruct discuss. interpretations ishibashi | non_dup | [] |
86416493 | 10.1007/JHEP09(2018)068 | We evaluate the partition function of the free and interacting O(N) vector
model on a two-parameter family of squashed three spheres in the presence of a
scalar deformation. We also find everywhere regular solutions of Einstein
gravity coupled to a scalar field in AdS and in dS with the same double
squashed boundary geometry. Remarkably, the thermodynamic properties of the AdS
solutions qualitatively agree with the behavior predicted by the free O(N)
model with a real mass deformation. The dS bulk solutions specify the
semiclassical `no-boundary' measure over anisotropic deformations of
inflationary, asymptotic de Sitter space. Through dS/CFT the partition function
of the interacting O(N) model yields a holographic toy model of the no-boundary
measure. We find this yields a qualitatively similar probability distribution
which is normalizable and globally peaked at the round three sphere, with a low
amplitude for strong anisotropies.Comment: 35 pages, version 2: presentation changed and comments adde | Squashed Holography with Scalar Condensates | squashed holography with scalar condensates | partition interacting squashed spheres deformation. everywhere einstein squashed geometry. remarkably thermodynamic qualitatively agree deformation. specify semiclassical anisotropic deformations inflationary asymptotic sitter space. partition interacting holographic measure. qualitatively normalizable globally peaked round sphere pages presentation changed comments adde | non_dup | [] |
141534249 | 10.1007/JHEP09(2018)074 | We present a method to combine the all-order treatment of the High Energy
Jets exclusive partonic Monte Carlo (HEJ) with the parton shower of Pythia8,
while retaining the logarithmic accuracy of both. This procedure enables the
generation of fully realistic and hadronised events with HEJ. Furthermore, the
combination of the two all-order treatments leads to improvements in the
quality of the description of observables, in particular for regions with
disparate transverse scales.Comment: 31 pages, 7 figures; updated to published versio | Merging High Energy with Soft and Collinear Logarithms using HEJ and
PYTHIA | merging high energy with soft and collinear logarithms using hej and pythia | combine jets exclusive partonic monte carlo parton shower pythia retaining logarithmic both. enables realistic hadronised hej. treatments improvements observables disparate pages updated versio | non_dup | [] |
146474508 | 10.1007/JHEP09(2018)091 | We study the spectrum of local operators living on a defect in a generic
conformal field theory, and their coupling to the local bulk operators. We
establish the existence of universal accumulation points in the spectrum at
large $s$, $s$ being the charge of the operators under rotations in the space
transverse to the defect. Our tools include a formula that inverts the bulk to
defect OPE, analogous to the Caron-Huot formula for the four-point function.
Analyticity of the formula in $s$ implies that the scaling dimensions of the
defect operators are aligned in Regge trajectories $\widehat{\Delta}(s)$. These
results require the correlator of two local operators and the defect to be
bounded in a certain region, a condition that we do not prove in general. We
check our conclusions against examples in perturbation theory and holography,
and we make specific predictions concerning the spectrum of defect operators on
Wilson lines. We also give an interpretation of the large $s$ spectrum in the
spirit of the work of Alday and Maldacena.Comment: 45 pages, 6 figures, a few comments added to improve clarity of the
expositio | Universality at large transverse spin in defect CFT | universality at large transverse spin in defect cft | living defect generic conformal operators. establish universal accumulation rotations defect. inverts defect analogous caron huot function. analyticity defect aligned regge trajectories widehat delta correlator defect general. check perturbation holography concerning defect wilson lines. spirit alday pages comments clarity expositio | non_dup | [] |
129359199 | 10.1007/JHEP09(2018)093 | We introduce superdensity operators as a tool for analyzing quantum
information in spacetime. Superdensity operators encode spacetime correlation
functions in an operator framework, and support a natural generalization of
Hilbert space techniques and Dirac's transformation theory as traditionally
applied to standard density operators. Superdensity operators can be measured
experimentally, but accessing their full content requires novel procedures. We
demonstrate these statements on several examples. The superdensity formalism
suggests useful definitions of spacetime entropies and spacetime quantum
channels. For example, we show that the von Neumann entropy of a superdensity
operator is related to a quantum generalization of the Kolmogorov-Sinai
entropy, and compute this for a many-body system. We also suggest experimental
protocols for measuring spacetime entropies.Comment: 43+16 pages, 12 figures; v2: typos fixed, references adde | Superdensity Operators for Spacetime Quantum Mechanics | superdensity operators for spacetime quantum mechanics | superdensity analyzing spacetime. superdensity encode spacetime generalization hilbert dirac traditionally operators. superdensity experimentally accessing procedures. statements examples. superdensity formalism definitions spacetime entropies spacetime channels. neumann superdensity generalization kolmogorov sinai system. protocols measuring spacetime pages typos adde | non_dup | [] |
141535056 | 10.1007/JHEP09(2018)103 | We study scalar conformal field theories whose large $N$ spectrum is fixed by
the operator dimensions of either Ising model or Lee-Yang edge singularity.
Using numerical bootstrap to study CFTs with $S_N\otimes Z_2$ symmetry, we find
a series of kinks whose locations approach
$(\Delta^{\text{Ising}}_{\sigma},\Delta^{\text{Ising}}_{\epsilon})$ at
$N\rightarrow \infty$. Setting $N=4$, we study the cubic anisotropic fixed
point with three spin components. As byproducts of our numerical bootstrap
work, we discover another series of kinks whose identification with previous
known CFTs remains a mystery. We also show that "minimal models" of
$\mathcal{W}_3$ algebra saturate the numerical bootstrap bounds of CFTs with
$S_3$ symmetry.Comment: 29 pages, 5 figure | Scalar CFTs and Their Large N Limits | scalar cfts and their large n limits | conformal ising singularity. bootstrap cfts otimes kinks locations delta ising sigma delta ising epsilon rightarrow infty cubic anisotropic components. byproducts bootstrap discover kinks cfts mystery. mathcal saturate bootstrap bounds cfts pages | non_dup | [] |
146476149 | 10.1007/JHEP09(2018)106 | We study the holographic complexity of Einstein-Maxwell-Dilaton gravity using
the recently proposed "complexity = volume" and "complexity = action"
dualities. The model we consider has a ground state that is represented in the
bulk via a so-called hyperscaling violating geometry. We calculate the action
growth of the Wheeler-DeWitt patch of the corresponding black hole solution at
non-zero temperature and find that, in the presence of violations of
hyperscaling, there is a parametric enhancement of the action growth rate. We
partially match this behavior to simple tensor network models which can capture
aspects of hyperscaling violation. We also exhibit the switchback effect in
complexity growth using shockwave geometries and comment on a subtlety of our
action calculations when the metric is discontinuous at a null surface.Comment: 30 pages; v2: Fixed a technical error. Corrected result no longer has
a logarithmic divergence in the action growth rate associated with the
singularity. Conjectured complexity growth rate now also matches better with
tensor network model | Holographic Complexity of Einstein-Maxwell-Dilaton Gravity | holographic complexity of einstein-maxwell-dilaton gravity | holographic einstein maxwell dilaton dualities. hyperscaling violating geometry. wheeler dewitt patch violations hyperscaling parametric enhancement rate. partially match capture hyperscaling violation. exhibit switchback shockwave geometries comment subtlety discontinuous pages error. corrected logarithmic divergence singularity. conjectured matches | non_dup | [] |
93959708 | 10.1007/JHEP09(2018)124 | We investigate the question whether leptogenesis, as a mechanism for
explaining the baryon asymmetry of the universe, can be tested at future
colliders. Focusing on the minimal scenario of two right-handed neutrinos, we
identify the allowed parameter space for successful leptogenesis in the heavy
neutrino mass range between $5$ and $50$ GeV. Our calculation includes the
lepton flavour violating contribution from heavy neutrino oscillations as well
as the lepton number violating contribution from Higgs decays to the baryon
asymmetry of the universe. We confront this parameter space region with the
discovery potential for heavy neutrinos at future lepton colliders, which can
be very sensitive in this mass range via displaced vertex searches. Beyond the
discovery of heavy neutrinos, we study the precision at which the
flavour-dependent active-sterile mixing angles can be measured. The measurement
of these mixing angles at future colliders can test whether a minimal type I
seesaw mechanism is the origin of the light neutrino masses, and it can be a
first step towards probing leptogenesis as the mechanism of baryogenesis. We
discuss how a stronger test could be achieved with an additional measurement of
the heavy neutrino mass difference.Comment: 30 pages plus appendix, 13 figures, references added, discussion
extended, two figures added, matches journal versio | Probing Leptogenesis at Future Colliders | probing leptogenesis at future colliders | leptogenesis explaining baryon asymmetry universe colliders. focusing handed neutrinos successful leptogenesis gev. lepton flavour violating oscillations lepton violating decays baryon asymmetry universe. confront discovery neutrinos lepton colliders displaced searches. discovery neutrinos precision flavour sterile angles measured. angles colliders seesaw probing leptogenesis baryogenesis. stronger pages matches versio | non_dup | [] |
74203040 | 10.1007/JHEP09(2018)127 | We construct a Schwinger-Keldysh effective field theory for relativistic
hydrodynamics for charged matter in a thermal background using a superspace
formalism. Superspace allows us to efficiently impose the symmetries of the
problem and to obtain a simple expression for the effective action. We show
that the theory we obtain is compatible with the Kubo-Martin-Schwinger
condition, which in turn implies that Green's functions obey the
fluctuation-dissipation theorem. Our approach complements and extends existing
formulations found in the literature.Comment: 51 pages, presentation improved, corrected typo | Dissipative hydrodynamics in superspace | dissipative hydrodynamics in superspace | schwinger keldysh relativistic hydrodynamics superspace formalism. superspace efficiently impose symmetries action. compatible kubo martin schwinger obey fluctuation dissipation theorem. complements extends formulations pages presentation corrected typo | non_dup | [] |
84331252 | 10.1007/JHEP09(2018)130 | We study well-motivated dark matter candidates arising from weakly-coupled
hidden sectors in compactified string/$M$-theory. Imposing generic top-down
constraints greatly restricts allowed candidates. By considering the possible
mechanisms for achieving the correct dark matter relic density, we compile
categories of viable dark matter candidates and annihilation mediators. We
consider the case where supersymmetry breaking occurs via moduli stabilisation
and is gravitationally mediated to the visible and other hidden sectors,
without assuming sequestering of the sector in which supersymmetry is broken.
We find that in this case, weakly-coupled hidden sectors only allow for
fermionic dark matter. Additionally, most of the mechanisms for obtaining the
full relic density only allow for a gauge boson mediator, such as a dark $Z'$.
Given these considerations, we study the potential for discovering or
constraining the allowed parameter space given current and future direct
detection experiments, and direct production at the LHC. We also present a
model of a hidden sector which would contain a satisfactory dark matter
candidate.Comment: 29 pages, 10 figure | Categorisation and Detection of Dark Matter Candidates from
String/M-theory Hidden Sectors | categorisation and detection of dark matter candidates from string/m-theory hidden sectors | motivated candidates arising weakly hidden sectors compactified theory. imposing generic greatly restricts candidates. achieving relic compile categories viable candidates annihilation mediators. supersymmetry breaking moduli stabilisation gravitationally visible hidden sectors sequestering supersymmetry broken. weakly hidden sectors fermionic matter. additionally obtaining relic boson mediator considerations discovering constraining lhc. hidden satisfactory pages | non_dup | [] |
83855951 | 10.1007/JHEP09(2018)132 | Supersymmetric localization has lead to remarkable progress in computing
quantum corrections to BPS black hole entropy. The program has been successful
especially for computing perturbative corrections to the Bekenstein-Hawking
area formula. In this work, we consider non-perturbative corrections related to
polar states in the Rademacher expansion, which describes the entropy in the
microcanonical ensemble. We propose that these non-perturbative effects can be
identified with a new family of saddles in the localization of the quantum
entropy path integral. We argue that these saddles, which are euclidean
$AdS_2\times S^1\times S^2$ geometries, arise after turning on singular fluxes
in M-theory on a Calabi-Yau. They cease to exist after a certain amount of
flux, resulting in a finite number of geometries; the bound on that number is
in precise agreement with the stringy exclusion principle. Localization of
supergravity on these backgrounds gives rise to a finite tail of Bessel
functions in agreement with the Rademacher expansion. As a check of our
proposal, we test our results against well-known microscopic formulas for
one-eighth and one-quarter BPS black holes in $\mathcal{N}=8$ and
$\mathcal{N}=4$ string theory respectively, finding agreement. Our method
breaks down precisely when mock-modular effects are expected in the entropy of
one-quarter BPS dyons and we comment upon this. Furthermore, we mention
possible applications of these results, including an exact formula for the
entropy of four dimensional $\mathcal{N}=2$ black holes.Comment: 66 page | Quantum Black Hole Entropy, Localization and the Stringy Exclusion
Principle | quantum black hole entropy, localization and the stringy exclusion principle | supersymmetric localization remarkable progress entropy. successful perturbative bekenstein hawking formula. perturbative polar rademacher describes microcanonical ensemble. propose perturbative saddles localization integral. argue saddles euclidean geometries arise turning singular fluxes calabi yau. cease geometries precise stringy exclusion principle. localization supergravity backgrounds tail bessel rademacher expansion. check proposal microscopic formulas eighth quarter holes mathcal mathcal agreement. breaks precisely mock modular quarter dyons comment this. mention mathcal | non_dup | [] |
146475723 | 10.1007/JHEP09(2018)137 | It has recently been demonstrated that black hole dynamics at large D is dual
to the motion of a probe membrane propagating in the background of a spacetime
that solves Einstein's equations. The equation of motion of this membrane is
determined by the membrane stress tensor. In this paper we `improve' the
membrane stress tensor derived in earlier work to ensure that it defines
consistent probe membrane dynamics even at finite $D$ while reducing to
previous results at large D. Our improved stress tensor is the sum of a Brown
York term and a fluid energy momentum tensor. The fluid has an unusual equation
of state; its pressure is nontrivial but its energy density vanishes. We
demonstrate that all stationary solutions of our membrane equations are
produced by the extremisation of an action functional of the membrane shape.
Our action is an offshell generalization of the membrane's thermodynamical
partition function. We demonstrate that the thermodynamics of static spherical
membranes in flat space and global AdS space exactly reproduces the
thermodynamics of the dual Schwarzschild black holes even at finite D. We study
the long wavelength dynamics of membranes in AdS space, and demonstrate that
the boundary `shadow' of this membrane dynamics is boundary hydrodynamics with
with a definite constitutive relation. We determine the explicit form of shadow
dual boundary stress tensor upto second order in derivatives of the boundary
temperature and velocity, and verify that this stress tensor agrees exactly
with the fluid gravity stress tensor to first order in derivatives, but
deviates from the later at second order and finite D.Comment: 64 pages, v2: footnote added, some typos correcte | An Action for and Hydrodynamics from the improved Large D membrane | an action for and hydrodynamics from the improved large d membrane | propagating spacetime solves einstein equations. tensor. ensure defines reducing brown tensor. unusual nontrivial vanishes. stationary extremisation shape. offshell generalization thermodynamical partition function. thermodynamics spherical membranes reproduces thermodynamics schwarzschild holes membranes shadow hydrodynamics definite constitutive relation. shadow upto derivatives verify agrees derivatives deviates pages footnote typos correcte | non_dup | [] |
162911712 | 10.1007/JHEP09(2018)138 | We consider Einstein gravity in AdS in the presence of a deformed conformal boundary metric, in the limit of large spacetime dimension. At leading order we find a new set of effective near-horizon equations. These can be understood as covariant generalisations of the undeformed equations with new source terms due to the curvature. We show that these equations are given by the conservation of the exact second-order Landau-frame hydrodynamic stress tensor. No derivative expansions are invoked in this identification. We use the new equations to study CFTs with 2d lattice deformations, computing their quasi-normal mode spectra and thermal conductivities, both numerically and analytically to quartic order in small lattice amplitude. Many of our results also apply to asymptotically flat spacetimes | Large D holography with metric deformations. | large d holography with metric deformations. | einstein deformed conformal spacetime dimension. horizon equations. understood covariant generalisations undeformed curvature. conservation landau hydrodynamic tensor. expansions invoked identification. cfts deformations quasi conductivities numerically analytically quartic amplitude. asymptotically spacetimes | non_dup | [] |
162911622 | 10.1007/JHEP09(2018)143 | The minimal supersymmetric (SUSY) standard model (MSSM) augmented by right chiral sneutrinos may lead to one such sneutrino serving as the lightest supersymmetric particle and a non-thermal dark matter candidate, especially if neutrinos have Dirac masses only. In such cases, if the lightest MSSM particle is a stau, the signal of SUSY at the LHC consists in stable charged tracks which are distinguishable from backgrounds through their time delay between the inner tracker and the muon chamber. We show how to determine in such scenarios the mass hierarchy between the lightest neutralino and right sleptons of the first two families. The techniques of neutralino reconstruction, developed in earlier works, are combined with the endpoint of the variable MT 2 in smuon (selectron) decays for this purpose. We show that one can thus determine the mass hierarchy for smuons (selectrons) and neutralinos up to 1 TeV, to the level of 5-10% | Long-lived stau, sneutrino dark matter and right-slepton spectrum. | long-lived stau, sneutrino dark matter and right-slepton spectrum. | supersymmetric susy mssm augmented chiral sneutrinos sneutrino serving lightest supersymmetric candidate neutrinos dirac only. lightest mssm stau susy tracks distinguishable backgrounds delay tracker muon chamber. scenarios hierarchy lightest neutralino sleptons families. neutralino reconstruction endpoint smuon selectron decays purpose. hierarchy smuons selectrons neutralinos | non_dup | [] |
29522088 | 10.1007/JHEP09(2018)145 | The differential branching fraction of the rare decay $\Lambda^{0}_{b}
\rightarrow \Lambda \mu^+\mu^-$ is measured as a function of $q^{2}$, the
square of the dimuon invariant mass. The analysis is performed using
proton-proton collision data, corresponding to an integrated luminosity of $3.0
\mbox{ fb}^{-1}$, collected by the LHCb experiment. Evidence of signal is
observed in the $q^2$ region below the square of the $J/\psi$ mass. Integrating
over $15 < q^{2} < 20 \mbox{ GeV}^2/c^4$ the branching fraction is measured as
$d\mathcal{B}(\Lambda^{0}_{b} \rightarrow \Lambda \mu^+\mu^-)/dq^2 = (1.18 ^{+
0.09} _{-0.08} \pm 0.03 \pm 0.27) \times 10^{-7} ( \mbox{GeV}^{2}/c^{4})^{-1}$,
where the uncertainties are statistical, systematic and due to the
normalisation mode, $\Lambda^{0}_{b} \rightarrow J/\psi \Lambda$, respectively.
In the $q^2$ intervals where the signal is observed, angular distributions are
studied and the forward-backward asymmetries in the dimuon ($A^{l}_{\rm FB}$)
and hadron ($A^{h}_{\rm FB}$) systems are measured for the first time. In the
range $15 < q^2 < 20 \mbox{ GeV}^2/c^4$ they are found to be $A^{l}_{\rm FB} =
-0.05 \pm 0.09 \mbox{ (stat)} \pm 0.03 \mbox{ (syst)}$ and $A^{h}_{\rm FB} =
-0.29 \pm 0.07 \mbox{ (stat)} \pm 0.03 \mbox{ (syst)}$.Comment: 27 pages, 10 figures, Erratum adde | Differential branching fraction and angular analysis of $\Lambda^{0}_{b}
\rightarrow \Lambda \mu^+\mu^-$ decays | differential branching fraction and angular analysis of $\lambda^{0}_{b} \rightarrow \lambda \mu^+\mu^-$ decays | branching rare lambda rightarrow lambda dimuon mass. proton proton collision luminosity mbox lhcb experiment. mass. integrating mbox branching mathcal lambda rightarrow lambda mbox normalisation lambda rightarrow lambda respectively. intervals backward asymmetries dimuon hadron time. mbox mbox stat mbox syst mbox stat mbox syst .comment pages erratum adde | non_dup | [] |
188187124 | 10.1007/JHEP09(2018)147 | A search is performed for a spin-0 boson, ϕ, produced in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, using prompt ϕ → μ⁺μ⁻ decays and a data sample corresponding to an integrated luminosity of approximately 3.0 fb⁻¹ collected with the LHCb detector. No evidence is found for a signal in the mass range from 5.5 to 15 GeV. Upper limits are placed on the product of the production cross-section and the branching fraction into the dimuon final state. The limits are comparable to the best existing over most of the mass region considered and are the first to be set near the ϒ resonances. Keywords: Beyond Standard Model; Hadron-Hadron scattering (experiments); Higgs physic | Search for a dimuon resonance in the ϒ mass region | search for a dimuon resonance in the ϒ mass region | boson proton proton collisions prompt μ⁺μ⁻ decays luminosity fb⁻¹ lhcb detector. gev. placed branching dimuon state. comparable resonances. keywords hadron hadron physic | non_dup | [] |
141537214 | 10.1007/JHEP09(2018)148 | A search is presented for resonances decaying to a Z boson and a photon. The
analysis is based on data from proton-proton collisions at a center-of-mass
energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb$^{-1}$,
and collected with the CMS detector at the LHC in 2016. Two decay modes of the
Z boson are investigated. In the leptonic channels, the Z boson candidates are
reconstructed using electron or muon pairs. In the hadronic channels, they are
identified using a large-radius jet, containing either light-quark or b quark
decay products of the Z boson, via jet substructure and advanced b quark
tagging techniques. The results from these channels are combined and
interpreted in terms of upper limits on the product of the production cross
section and the branching fraction to Z$\gamma$ for narrow and broad spin-0
resonances with masses between 0.35 and 4.0 TeV, providing thereby the most
stringent limits on such resonances.Comment: Replaced with the published version. Added the journal reference and
the DOI. All the figures and tables can be found at
http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-17-005
(CMS Public Pages | Search for Z$\gamma$ resonances using leptonic and hadronic final states
in proton-proton collisions at $\sqrt{s}=$ 13 TeV | search for z$\gamma$ resonances using leptonic and hadronic final states in proton-proton collisions at $\sqrt{s}=$ 13 tev | resonances decaying boson photon. proton proton collisions luminosity boson investigated. leptonic boson candidates reconstructed muon pairs. hadronic boson substructure advanced tagging techniques. interpreted branching gamma narrow broad resonances thereby stringent replaced version. doi. tables publications pages | non_dup | [] |
74251604 | 10.1007/JHEP09(2018)150 | We introduce spectral functions that capture the distribution of OPE
coefficients and density of states in two-dimensional conformal field theories,
and show that nontrivial upper and lower bounds on the spectral function can be
obtained from semidefinite programming. We find substantial numerical evidence
indicating that OPEs involving only scalar Virasoro primaries in a c>1 CFT are
necessarily governed by the structure constants of Liouville theory. Combining
this with analytic results in modular bootstrap, we conjecture that Liouville
theory is the unique unitary c>1 CFT whose primaries have bounded spins. We
also use the spectral function method to study modular constraints on CFT
spectra, and discuss some implications of our results on CFTs of large c and
large gap, in particular, to what extent the BTZ spectral density is universal.Comment: 44 pages, 15 figure | Bootstrapping the Spectral Function: On the Uniqueness of Liouville and
the Universality of BTZ | bootstrapping the spectral function: on the uniqueness of liouville and the universality of btz | capture conformal nontrivial bounds semidefinite programming. substantial opes involving virasoro primaries necessarily governed liouville theory. combining analytic modular bootstrap conjecture liouville unitary primaries spins. modular cfts pages | non_dup | [] |
93960176 | 10.1007/JHEP09(2018)152 | Recent measurements of $R_{D^*}$ have reduced tension with the Standard Model
prediction. Taking all the present data into account, we obtain the values of
the Wilson coefficients of each new physics four-fermion operator of a given
Lorentz structure. We find that the combined data rule out most of the
solutions based on scalar/pseudoscalar operators. By studying the
inter-relations between different solutions, we find that there are only four
allowed solutions, which are based on operators with $(V-A)$, linear
combination of $(V-A)$ and $(V+A)$, tensor and linear combination of
scalar/pseudoscalar and tensor structure. We demonstrate that the need for new
physics is driven by those measurement of $R_D$ and $R_{D^*}$ where the $\tau$
lepton is not studied. Further, we show that new physics only in $b\rightarrow
c\,\mu\,\bar{\nu}$ is not compatible with the full set of observables in the
decays $B\rightarrow Dl\bar{\nu}$ and $B\rightarrow D^*l\bar{\nu}$.Comment: 16 pages, 1 figure (Accepted for publication in JHEP | New physics solutions for $R_D$ and $R_{D^*}$ | new physics solutions for $r_d$ and $r_{d^*}$ | tension prediction. wilson fermion lorentz structure. pseudoscalar operators. studying pseudoscalar structure. lepton studied. rightarrow compatible observables decays rightarrow rightarrow .comment pages publication jhep | non_dup | [] |
2129416 | 10.1007/JHEP10(2010)001 | We argue that gravitational interactions between open strings ending on
D3-branes are largely shaped by the D3-branes' backreaction. To this end we
consider classical open strings coupled to general relativity in Poincare AdS5
backgrounds. We compute the linear gravitational backreaction of a static
string extending up to the Poincare horizon, and deduce the potential energy
between two such strings. If spacetime is non-compact, we find that the
gravitational potential energy between parallel open strings is independent of
the strings' inertial masses and goes like 1/r at large distance r. If the
space transverse to the D3-branes is suitably compactified, a collective mode
of the graviton propagates usual four-dimensional gravity. In that case the
backreaction of the D3-branes induces a correction to the Newtonian potential
energy that violates the equivalence principle. The observed enhancement of the
gravitational attraction is specific to string theory; there is no similar
effect for point-particles.Comment: 28 pages, 7 figures. Typos corrected, minor addition | The influence of D-branes' backreaction upon gravitational interactions
between open strings | the influence of d-branes' backreaction upon gravitational interactions between open strings | argue gravitational strings ending branes largely shaped branes backreaction. strings relativity poincare backgrounds. gravitational backreaction extending poincare horizon deduce strings. spacetime gravitational strings strings inertial goes branes suitably compactified collective graviton propagates usual gravity. backreaction branes induces newtonian violates equivalence principle. enhancement gravitational attraction pages figures. typos corrected minor | non_dup | [] |
2134143 | 10.1007/JHEP10(2010)002 | We investigate BPS conditions preserving n/12 (n = 1,...,6) supersymmetries
in the Aharony-Bergman-Jafferis-Maldacena (ABJM) model. The BPS equations are
classified in terms of the number of preserved supercharges and remaining
subgroups of the SU(4)_R symmetry. We study structures of a map between
projection conditions for the supercharges in eleven dimensions and those in
the ABJM model. The BPS configurations in the ABJM model can be interpreted as
known BPS objects in eleven-dimensional Mtheory,such as intersecting M2,
M5-branes, M-waves, KK-monopoles and M9-branes. We also show that these BPS
conditions reduce to those in N = 8 super Yang-Mills theory via the standard
D2-reduction procedure in a consistent way with the M-theory interpretation of
the BPS conditions.Comment: 47 pages, 0 figure | Classification of BPS Objects in N = 6 Chern-Simons Matter Theory | classification of bps objects in n = 6 chern-simons matter theory | preserving supersymmetries aharony bergman jafferis maldacena abjm model. classified preserved supercharges subgroups symmetry. projection supercharges eleven abjm model. configurations abjm interpreted eleven mtheory intersecting branes monopoles branes. super mills pages | non_dup | [] |
2114108 | 10.1007/JHEP10(2010)003 | We propose a new matrix model describing multi-baryon systems. We derive the
action from open string theory on the wrapped baryon vertex D-branes embedded
in the D4-D8 model of large N holographic QCD. The positions of k baryons are
unified into k x k matrices, with spin/isospin of the baryons encoded in a set
of k-vectors. Holographic baryons are known to be very small in the large 't
Hooft coupling limit, and our model offers a better systematic approach to
dynamics of such baryons at short distances. We compute energetics and spectra
(k=1), and also short-distance nuclear force (k=2). In particular, we obtain a
new size of the holographic baryon and find a precise form of the repulsive
core of nucleons. This matrix model complements the instanton soliton picture
of holographic baryons, whose small size turned out to be well below the
natural length scale of the approximation involved there. Our results show
that, nevertheless, the basic properties of holographic baryons obtained there
are robust under stringy corrections within a few percents.Comment: 30 pages. v3: more comments added, published versio | A Matrix Model for Baryons and Nuclear Forces | a matrix model for baryons and nuclear forces | propose describing baryon systems. derive wrapped baryon branes embedded holographic qcd. baryons unified isospin baryons encoded vectors. holographic baryons hooft offers baryons distances. energetics holographic baryon precise repulsive nucleons. complements instanton soliton picture holographic baryons turned there. nevertheless holographic baryons robust stringy pages. comments versio | non_dup | [] |
2107918 | 10.1007/JHEP10(2010)004 | We show how direct integration can be used to solve the closed amplitudes of
multi-cut matrix models with polynomial potentials. In the case of the cubic
matrix model, we give explicit expressions for the ring of non-holomorphic
modular objects that are needed to express all closed matrix model amplitudes.
This allows us to integrate the holomorphic anomaly equation up to holomorphic
modular terms that we fix by the gap condition up to genus four. There is an
one-dimensional submanifold of the moduli space in which the spectral curve
becomes the Seiberg--Witten curve and the ring reduces to the non-holomorphic
modular ring of the group $\Gamma(2)$. On that submanifold, the gap conditions
completely fix the holomorphic ambiguity and the model can be solved explicitly
to very high genus. We use these results to make precision tests of the
connection between the large order behavior of the 1/N expansion and
non-perturbative effects due to instantons. Finally, we argue that a full
understanding of the large genus asymptotics in the multi-cut case requires a
new class of non-perturbative sectors in the matrix model.Comment: 51 pages, 8 figure | Direct Integration and Non-Perturbative Effects in Matrix Models | direct integration and non-perturbative effects in matrix models | solve amplitudes potentials. cubic expressions holomorphic modular express amplitudes. integrate holomorphic anomaly holomorphic modular genus four. submanifold moduli seiberg witten reduces holomorphic modular gamma submanifold holomorphic ambiguity solved explicitly genus. precision connection perturbative instantons. argue genus asymptotics perturbative sectors pages | non_dup | [] |
2134540 | 10.1007/JHEP10(2010)005 | We study the ground state of baryonic/axial matter at zero temperature
chiral-symmetry broken phase under a large magnetic field, in the framework of
holographic QCD by Sakai-Sugimoto. Our study is motivated by a recent proposal
of chiral magnetic spiral phase that has been argued to be favored against
previously studied phase of homogeneous distribution of axial/baryonic currents
in terms of meson super-currents dictated by triangle anomalies in QCD. Our
results provide an existence proof of chiral magnetic spiral in strong coupling
regime via holography, at least for large axial chemical potentials, whereas we
don't find the phenomenon in the case of purely baryonic chemical potential.Comment: 24 pages, 15 figure | Holographic chiral magnetic spiral | holographic chiral magnetic spiral | baryonic axial chiral broken holographic sakai sugimoto. motivated proposal chiral spiral argued favored homogeneous axial baryonic currents meson super currents dictated triangle anomalies qcd. chiral spiral holography axial potentials phenomenon purely baryonic pages | non_dup | [] |
2131757 | 10.1007/JHEP10(2010)006 | We investigate holographic superfluids in AdS_{d+1} with d=3,4 in the
non-backreacted approximation for various masses of the scalar field. In d=3
the phase structure is universal for all the masses that we consider: the
critical temperature decreases as the superfluid velocity increases, and as it
is cranked high enough, the order of the phase transition changes from second
to first. Surprisingly, in d=4 we find that the phase structure is more
intricate. For sufficiently high mass, there is always a second order phase
transition to the normal phase, no matter how high the superfluid velocity. For
some parameters, as we lower the temperature, this transition happens before a
first order transition to a new superconducting phase. Across this first order
transition, the gap in the transverse conductivity jumps from almost zero to
about half its maximum value. We also introduce a double scaling limit where we
can study the phase transitions (semi-)analytically in the large velocity
limit. The results corroborate and complement our numerical results. In d=4,
this approach has the virtue of being fully analytically tractable.Comment: 31 pages, 19 figure | The Many Phases of Holographic Superfluids | the many phases of holographic superfluids | holographic superfluids backreacted field. universal superfluid cranked first. surprisingly intricate. sufficiently superfluid velocity. happens superconducting phase. conductivity jumps value. analytically limit. corroborate complement results. virtue analytically pages | non_dup | [] |
2119988 | 10.1007/JHEP10(2010)007 | We use supertwistor space to construct scattering amplitudes of maximal
superconformal theories in three and six dimensions. In both cases, the
constraints of superconformal invariance and rationality imply that the
three-point amplitude vanishes on-shell, which constrains the four-point
amplitude to have vanishing residues in all channels. In three dimensions, we
find a unique solution for the four-point amplitude and demonstrate that it
agrees with the component result in the BLG theory. This suggests that BLG is
the unique three-dimensional theory with classical OSp(8|4) symmetry that
admits a Lagrangian description. We also show that one can derive the
four-point amplitude of the ABJM theory from our N=8 result by reducing the
supersymmetry, which implies that the tree-level Yangian symmetry recently
found in ABJM is also present in BLG. In six dimensions, we find that the
consistency conditions imply that all tree-level amplitudes vanish. This leads
us to conjecture that an interacting six-dimensional theory with classical
OSp(8|4) symmetry does not have a Lagrangian description, local or nonlocal,
unless the (2,0) tensor multiplets are supplemented by additional degrees of
freedom.Comment: 38 pages, 7 figures; v3: minor changes, published in JHE | Amplitudes of 3D and 6D Maximal Superconformal Theories in Supertwistor
Space | amplitudes of 3d and 6d maximal superconformal theories in supertwistor space | supertwistor amplitudes maximal superconformal dimensions. superconformal invariance rationality imply vanishes constrains vanishing channels. agrees theory. admits lagrangian description. derive abjm reducing supersymmetry yangian abjm blg. consistency imply amplitudes vanish. conjecture interacting lagrangian nonlocal unless multiplets supplemented pages minor | non_dup | [] |
2134222 | 10.1007/JHEP10(2010)008 | We consider a four dimensional field theory with target space being CP^N
which constitutes a generalization of the usual Skyrme-Faddeev model defined on
CP^1. We show that it possesses an integrable sector presenting an infinite
number of local conservation laws, which are associated to the hidden
symmetries of the zero curvature representation of the theory in loop space. We
construct an infinite class of exact solutions for that integrable submodel
where the fields are meromorphic functions of the combinations (x^1+i x^2) and
(x^3+x^0) of the Cartesian coordinates of four dimensional Minkowski
space-time. Among those solutions we have static vortices and also vortices
with waves traveling along them with the speed of light. The energy per unity
of length of the vortices show an interesting and intricate interaction among
the vortices and waves.Comment: 21 pages, plain latex, no figure | Exact vortex solutions in a CP^N Skyrme-Faddeev type model | exact vortex solutions in a cp^n skyrme-faddeev type model | constitutes generalization usual skyrme faddeev possesses integrable presenting infinite conservation laws hidden symmetries curvature space. infinite integrable submodel meromorphic combinations cartesian minkowski time. vortices vortices traveling light. unity vortices intricate vortices pages plain latex | non_dup | [] |
2126165 | 10.1007/JHEP10(2010)009 | We compare the effectiveness of two hypotheses, Natural Flavour Conservation
(NFC) and Minimal Flavour Violation (MFV), in suppressing the strength of
flavour-changing neutral-currents (FCNCs) in models with more than one Higgs
doublet. We show that the MFV hypothesis, in its general formulation, is more
stable in suppressing FCNCs than the hypothesis of NFC alone when quantum
corrections are taken into account. The phenomenological implications of the
two scenarios are discussed analysing meson-antimeson mixing observables and
the rare decays B -> mu+ mu-. We demonstrate that, introducing flavour-blind CP
phases, two-Higgs doublet models respecting the MFV hypothesis can accommodate
a large CP-violating phase in Bs mixing, as hinted by CDF and D0 data and,
without extra free parameters, soften significantly in a correlated manner the
observed anomaly in the relation between epsilon_K and S_psi_K.Comment: 27 pages, 4 figures. v3: minor modifications (typos corrected and few
refs. added), conclusions unchanged; journal versio | Higgs-mediated FCNCs: Natural Flavour Conservation vs. Minimal Flavour
Violation | higgs-mediated fcncs: natural flavour conservation vs. minimal flavour violation | effectiveness hypotheses flavour conservation flavour violation suppressing flavour changing neutral currents fcncs doublet. formulation suppressing fcncs account. phenomenological scenarios analysing meson antimeson observables rare decays introducing flavour blind doublet respecting accommodate violating hinted extra soften manner anomaly epsilon pages figures. minor modifications typos corrected refs. unchanged versio | non_dup | [] |
2141339 | 10.1007/JHEP10(2010)010 | Inspired by recent lattice measurements, we determine the short-distance (a
<< r << 1/pi T) as well as large-frequency (1/a >> omega >> pi T) asymptotics
of scalar (trace anomaly) and pseudoscalar (topological charge density)
correlators at 2-loop order in hot Yang-Mills theory. The results are expressed
in the form of an Operator Product Expansion. We confirm and refine the
determination of a number of Wilson coefficients; however some discrepancies
with recent literature are detected as well, and employing the correct values
might help, on the qualitative level, to understand some of the features
observed in the lattice measurements. On the other hand, the Wilson
coefficients show slow convergence and it appears uncertain whether this
approach can lead to quantitative comparisons with lattice data. Nevertheless,
as we outline, our general results might serve as theoretical starting points
for a number of perhaps phenomenologically more successful lines of
investigation.Comment: 27 pages. v2: minor improvements, published versio | Ultraviolet asymptotics of scalar and pseudoscalar correlators in hot
Yang-Mills theory | ultraviolet asymptotics of scalar and pseudoscalar correlators in hot yang-mills theory | inspired omega asymptotics trace anomaly pseudoscalar topological correlators mills theory. expansion. confirm refine wilson discrepancies employing qualitative measurements. wilson slow uncertain comparisons data. nevertheless outline serve perhaps phenomenologically successful pages. minor improvements versio | non_dup | [] |
2136857 | 10.1007/JHEP10(2010)011 | Attention has been paid to the similarity and duality between the
Gregory-Laflamme instability of black strings and the Rayleigh-Plateau
instability of extended fluids. In this paper, we derive a set of simple
(1+1)-dimensional equations from the Navier-Stokes equations describing thin
flows of (non-relativistic and incompressible) viscous fluids. This
formulation, a generalization of the theory of drop formation by Eggers and his
collaborators, would make it possible to examine the final fate of
Rayleigh-Plateau instability, its dimensional dependence, and possible
self-similar behaviors before and after the drop formation, in the context of
fluid/gravity correspondence.Comment: 17 pages, 3 figures; v2: refs & comments adde | One-Dimensional Approximation of Viscous Flows | one-dimensional approximation of viscous flows | paid similarity duality gregory laflamme instability strings rayleigh plateau instability fluids. derive navier stokes describing flows relativistic incompressible viscous fluids. formulation generalization drop eggers collaborators examine fate rayleigh plateau instability behaviors drop pages refs comments adde | non_dup | [] |
2130259 | 10.1007/JHEP10(2010)012 | The motion of strings on symmetric space target spaces underlies the
integrability of the AdS/CFT correspondence. Although these theories, whose
excitations are giant magnons, are non-relativistic they are classically
equivalent, via the Polhmeyer reduction, to a relativistic integrable field
theory known as a symmetric space sine-Gordon theory. These theories can be
formulated as integrable deformations of gauged WZW models. In this work we
consider the class of symmetric spaces CP^{n+1} and solve the corresponding
generalized sine-Gordon theories at the quantum level by finding the exact
spectrum of topological solitons, or kinks, and their S-matrix. The latter
involves a trignometric solution of the Yang-Baxer equation which exhibits a
quantum group symmetry with a tower of states that is bounded, unlike for
magnons, as a result of the quantum group deformation parameter q being a root
of unity. We test the S-matrix by taking the semi-classical limit and comparing
with the time delays for the scattering of classical solitons. We argue that
the internal CP^{n-1} moduli space of collective coordinates of the solitons in
the classical theory can be interpreted as a q-deformed fuzzy space in the
quantum theory. We analyse the n=1 case separately and provide a further test
of the S-matrix conjecture in this case by calculating the central charge of
the UV CFT using the thermodynamic Bethe Ansatz.Comment: 33 pages, important correction to S-matrix to ensure crossing
symmetr | The Relativistic Avatars of Giant Magnons and their S-Matrix | the relativistic avatars of giant magnons and their s-matrix | strings underlies integrability correspondence. excitations giant magnons relativistic classically polhmeyer relativistic integrable sine gordon theory. formulated integrable deformations gauged models. solve sine gordon topological solitons kinks matrix. involves trignometric baxer exhibits tower unlike magnons deformation unity. delays solitons. argue moduli collective solitons interpreted deformed fuzzy theory. analyse separately conjecture calculating thermodynamic bethe pages ensure crossing symmetr | non_dup | [] |
2114814 | 10.1007/JHEP10(2010)013 | We test several conjectural dualities between strongly coupled superconformal
field theories in three dimensions by computing their exact partition functions
on a three-sphere as a function of Fayet-Iliopoulos and mass parameters. The
calculation is carried out using localization of the path integral and the
matrix model previously derived for superconformal N = 2 gauge theories. We
verify that the partition functions of quiver theories related by mirror
symmetry agree provided the mass parameters and the Fayet-Iliopoulos parameters
are exchanged, as predicted. We carry out a similar calculation for the mirror
of N = 8 super-Yang-Mills theory and show that its partition function agrees
with that of the ABJM theory at unit Chern-Simons level. This provides a
nonperturbative test of the conjectural equivalence of the two theories in the
conformal limit | Nonperturbative Tests of Three-Dimensional Dualities | nonperturbative tests of three-dimensional dualities | conjectural dualities superconformal partition sphere fayet iliopoulos parameters. localization superconformal theories. verify partition quiver mirror agree fayet iliopoulos exchanged predicted. carry mirror super mills partition agrees abjm chern simons level. nonperturbative conjectural equivalence conformal | non_dup | [] |
2120755 | 10.1007/JHEP10(2010)014 | Diffractive excitation is usually described by the Good--Walker formalism for
low masses, and by the triple-Regge formalism for high masses. In the
Good--Walker formalism the cross section is determined by the fluctuations in
the interaction. In this paper we show that by taking the fluctuations in the
BFKL ladder into account, it is possible to describe both low and high mass
excitation by the Good--Walker mechanism. In high energy $pp$ collisions the
fluctuations are strongly suppressed by saturation, which implies that pomeron
exchange does not factorise between DIS and $pp$ collisions. The Dipole Cascade
Model reproduces the expected triple-Regge form for the bare pomeron, and the
triple-pomeron coupling is estimated.Comment: 20 pages, 12 figure | Fluctuations, Saturation, and Diffractive Excitation in High Energy
Collisions | fluctuations, saturation, and diffractive excitation in high energy collisions | diffractive walker formalism triple regge formalism masses. walker formalism interaction. bfkl ladder walker mechanism. collisions suppressed saturation pomeron factorise collisions. dipole cascade reproduces triple regge bare pomeron triple pomeron pages | non_dup | [] |
2109917 | 10.1007/JHEP10(2010)015 | We embed a holographic model of an U(1) charged fluid with Galilean
invariance in string theory and calculate its specific heat capacity and
Prandtl number. Such theories are generated by a R-symmetry twist along a null
direction of a N=1 superconformal theory. We study the hydrodynamic properties
of such systems employing ideas from the fluid-gravity correspondence.Comment: 31 pages, 1 figure, JHEP3 style, refs added, typos corrected, missing
terms in spatial charge current and field corrections added, to be published
in JHE | Charged, conformal non-relativistic hydrodynamics | charged, conformal non-relativistic hydrodynamics | embed holographic galilean invariance prandtl number. twist superconformal theory. hydrodynamic employing ideas pages jhep style refs typos corrected missing | non_dup | [] |
2132728 | 10.1007/JHEP10(2010)016 | We obtain a three-parameter family of massive N=1 supergravities in three
dimensions from the 3-sphere reduction of an off-shell N=(1,0) six-dimensional
Poincare supergravity that includes a curvature squared invariant. The
three-dimensional theory contains an off-shell supergravity multiplet and an
on-shell scalar matter multiplet. We then generalise this in three dimensions
to an eight-parameter family of supergravities. We also find a duality
relationship between the six-dimensional theory and the N=(1,0) six-dimensional
theory obtained through a T^4 reduction of the heterotic string effective
action that includes the higher-order terms associated with the
supersymmetrisation of the anomaly-cancelling \tr(R\wedge R) term.Comment: Latex, 32 Pages, an equation is corrected, a few new equations and a
number of clarifying remarks are adde | Massive Three-Dimensional Supergravity From R+R^2 Action in Six
Dimensions | massive three-dimensional supergravity from r+r^2 action in six dimensions | massive supergravities sphere poincare supergravity curvature squared invariant. supergravity multiplet multiplet. generalise eight supergravities. duality heterotic supersymmetrisation anomaly cancelling wedge latex pages corrected clarifying remarks adde | non_dup | [] |
2139290 | 10.1007/JHEP10(2010)017 | We consider the class of four-dimensional N=2 gauged supergravities whose
maximally symmetric ground states leave only one of the two supersymmetries
intact. For these theories we derive the low-energy effective action below the
scale of partial supersymmetry breaking and compute the N=1 couplings in terms
of the N=2 'input data'. We show that this effective action satisfies the
constraints of N=1 supergravity in that its sigma-model metric is Kahler, while
the superpotential and the gauge kinetic functions are holomorphic. As an
example we discuss the N=1 effective supergravity of type II compactifications.Comment: 37 pages; v2: typos corrected, Appendix B clarified (published
version | The N=1 Low-Energy Effective Action of Spontaneously Broken N=2
Supergravities | the n=1 low-energy effective action of spontaneously broken n=2 supergravities | gauged supergravities maximally leave supersymmetries intact. derive supersymmetry breaking couplings satisfies supergravity sigma kahler superpotential holomorphic. supergravity pages typos corrected clarified | non_dup | [] |
2136452 | 10.1007/JHEP10(2010)018 | We investigate the phenomenology of Effective Supersymmetry (ESUSY) models
wherein electroweak gauginos and third generation scalars have masses up to
about 1~TeV while first and second generation scalars lie in the multi-TeV
range. Such models ameliorate the SUSY flavor and CP problems via a decoupling
solution, while at the same time maintaining naturalness. In our analysis, we
assume independent GUT scale mass parameters for third and first/second
generation scalars and for the Higgs scalars, in addition to m_{1/2}, \tan\beta
and A_0, and require radiative electroweak symmetry breaking as usual. We
analyse the parameter space which is consistent with current constraints, by
means of a Markov Chain Monte Carlo scan. The lightest MSSM particle (LMP) is
mostly, but not always the lightest neutralino, and moreover, the thermal relic
density of the neutralino LMP is frequently very large. These models may
phenomenologically be perfectly viable if the LMP before nucleosynthesis decays
into the axino plus SM particles. Dark matter is then an axion/axino mixture.
At the LHC, the most important production mechanisms are gluino production (for
m_{1/2} ~<700~GeV) and third generation squark production, while SUSY events
rich in b-jets are the hallmark of the ESUSY scenario. We present a set of
ESUSY benchmark points with characteristic features and discuss their LHC
phenomenology.Comment: 26 pages including 13 figure | Effective Supersymmetry at the LHC | effective supersymmetry at the lhc | phenomenology supersymmetry esusy wherein electroweak gauginos scalars scalars range. ameliorate susy flavor decoupling maintaining naturalness. scalars scalars beta radiative electroweak breaking usual. analyse markov monte carlo scan. lightest mssm mostly lightest neutralino relic neutralino frequently large. phenomenologically perfectly viable nucleosynthesis decays axino particles. axion axino mixture. gluino squark susy jets hallmark esusy scenario. esusy benchmark pages | non_dup | [] |
2140120 | 10.1007/JHEP10(2010)019 | We study the finite temperature Casimir effect on a pair of parallel
perfectly conducting plates in Randall-Sundrum model without using scalar field
analogy. Two different ways of interpreting perfectly conducting conditions are
discussed. The conventional way that uses perfectly conducting condition
induced from 5D leads to three discrete mode corrections. This is very
different from the result obtained from imposing 4D perfectly conducting
conditions on the 4D massless and massive vector fields obtained by decomposing
the 5D electromagnetic field. The latter only contains two discrete mode
corrections, but it has a continuum mode correction that depends on the
thicknesses of the plates. It is shown that under both boundary conditions, the
corrections to the Casimir force make the Casimir force more attractive. The
correction under 4D perfectly conducting condition is always smaller than the
correction under the 5D induced perfectly conducting condition. These
statements are true at any temperature.Comment: 20 pages, 4 figure | Casimir effect of electromagnetic field in Randall-Sundrum spacetime | casimir effect of electromagnetic field in randall-sundrum spacetime | casimir perfectly conducting plates randall sundrum analogy. ways interpreting perfectly conducting discussed. perfectly conducting corrections. imposing perfectly conducting massless massive decomposing electromagnetic field. continuum thicknesses plates. casimir casimir attractive. perfectly conducting perfectly conducting condition. statements pages | non_dup | [] |
2068173 | 10.1007/JHEP10(2010)020 | We construct in the context of the AdS/CFT correspondence degenerate
composite operators in the conformal field theory that are holographically dual
to degenerate stars in anti de Sitter space. We calculate the effect of the
gravitational back-reaction using the Tolman-Oppenheimer-Volkoff equations, and
determine the "Chandrasekhar limit" beyond which the star undergoes
gravitational collapse towards a black hole.Comment: 4 pages, 3 figures, pdflatex. Typos and cross reference corrected,
discussion clarifie | Holographic Neutron Stars | holographic neutron stars | correspondence degenerate composite conformal holographically degenerate sitter space. gravitational tolman oppenheimer volkoff chandrasekhar undergoes gravitational collapse pages pdflatex. typos corrected clarifie | non_dup | [] |
2126162 | 10.1007/JHEP10(2010)021 | We revisit Kaluza-Klein compactification of 11-d supergravity on S^7/Z_k
using group theory techniques that may find application in other flux vacua
with internal coset spaces. Among the SO(2) neutral states, we identify
marginal deformations and fields that couple to the recently discussed
world-sheet instanton of Type IIA on CP^3. We also discuss charged states, dual
to monopole operators, and the Z_k projection of the Osp(4|8) singleton and its
tensor products. In particular, we show that the doubleton spectrum may account
for N=6 higher spin symmetry enhancement in the limit of vanishing 't Hooft
coupling in the boundary Chern-Simons theory.Comment: 44 page | Precision Spectroscopy and Higher Spin symmetry in the ABJM model | precision spectroscopy and higher spin symmetry in the abjm model | revisit kaluza klein compactification supergravity vacua coset spaces. neutral marginal deformations couple sheet instanton monopole projection singleton products. doubleton enhancement vanishing hooft chern simons | non_dup | [] |
2132171 | 10.1007/JHEP10(2010)022 | We study ALP-photon-conversion within strong inhomogeneous electromagnetic
fields as provided by contemporary high-intensity laser systems. We observe
that probe photons traversing the focal spot of a superposition of Gaussian
beams of a single high-intensity laser at fundamental and frequency-doubled
mode can experience a frequency shift due to their intermittent propagation as
axion-like-particles. This process is strongly peaked for resonant masses on
the order of the involved laser frequencies. Purely laser-based experiments in
optical setups are sensitive to ALPs in the $\mathrm{eV}$ mass range and can
thus complement ALP searches at dipole magnets.Comment: 25 pages, 2 figure | Axion-like-particle search with high-intensity lasers | axion-like-particle search with high-intensity lasers | conversion inhomogeneous electromagnetic contemporary systems. photons traversing focal spot superposition beams doubled intermittent propagation axion particles. peaked resonant frequencies. purely setups alps mathrm complement searches dipole pages | non_dup | [] |
2123070 | 10.1007/JHEP10(2010)023 | We calculate the relic abundance of thermally produced neutralino cold dark
matter in the general 19 parameter supergravity (SUGRA-19) model. A scan over
GUT scale parameters reveals that models with a bino-like neutralino typically
give rise to a dark matter density \Omega_{\tz_1}h^2\sim 1-1000, i.e. between 1
and 4 orders of magnitude higher than the measured value. Models with higgsino
or wino cold dark matter can yield the correct relic density, but mainly for
neutralino masses around 700-1300 GeV. Models with mixed bino-wino or
bino-higgsino CDM, or models with dominant co-annihilation or A-resonance
annihilation can yield the correct abundance, but such cases are extremely hard
to generate using a general scan over GUT scale parameters; this is indicative
of high fine-tuning of the relic abundance in these cases. Requiring that
m_{\tz_1}\alt 500 GeV (as a rough naturalness requirement) gives rise to a
minimal probably dip in parameter space at the measured CDM abundance. For
comparison, we also scan over mSUGRA space with four free parameters. Finally,
we investigate the Peccei-Quinn augmented MSSM with mixed axion/axino cold dark
matter. In this case, the relic abundance agrees more naturally with the
measured value. In light of our cumulative results, we conclude that future
axion searches should probe much more broadly in axion mass, and deeper into
the axion coupling.Comment: 23 pages including 17 .eps figure | Neutralino versus axion/axino cold dark matter in the 19 parameter SUGRA
model | neutralino versus axion/axino cold dark matter in the 19 parameter sugra model | relic abundance thermally neutralino cold supergravity sugra model. scan reveals bino neutralino omega i.e. orders value. higgsino wino cold relic neutralino gev. bino wino bino higgsino annihilation annihilation abundance extremely scan indicative fine tuning relic abundance cases. requiring rough naturalness requirement probably abundance. scan msugra parameters. peccei quinn augmented mssm axion axino cold matter. relic abundance agrees naturally value. cumulative axion searches broadly axion deeper axion pages .eps | non_dup | [] |
2132162 | 10.1007/JHEP10(2010)024 | We consider gravitino couplings in theories with broken gauge symmetries. In
particular, we compute the single gravitino production cross section in W+ W-
fusion processes. Despite recent claims to the contrary, we show that this
process is always subdominant to gluon fusion processes in the high energy
limit. The full calculation is performed numerically; however, we give analytic
expressions for the cross section in the supersymmetric and electroweak limits.
We also confirm these results with the use of the effective theory of goldstino
interactions.Comment: 26 pages, 4 figure | The gravitino coupling to broken gauge theories applied to the MSSM | the gravitino coupling to broken gauge theories applied to the mssm | gravitino couplings broken symmetries. gravitino fusion processes. claims contrary subdominant gluon fusion limit. numerically analytic expressions supersymmetric electroweak limits. confirm goldstino pages | non_dup | [] |
2121473 | 10.1007/JHEP10(2010)025 | We explore, in a concrete example, to which extent new particle mass
determinations are practicable with LHC data. Our chosen example is that of
Yukawa-unified SUSY GUTs, whose viability has been recently studied for two
general patterns of soft SUSY-breaking terms. We note that both patterns of
SUSY spectra do not admit long decay chains, which would make it possible to
determine the masses of the SUSY particles involved using endpoints or mass
relations. We thus take the so-called mT2-kink method as our key strategy,
since it does not rely on the presence of long decay chains. We then discuss a
procedure allowing to determine the masses of the gluino, of the lightest
chargino as well as of the first two neutralinos and, for the scenario where a
stop is lighter than the gluino, the mass of the light stop too. Our worked
example of Yukawa-unified SUSY GUTs may offer a useful playground for dealing
with other theories which predict similar patterns of SUSY spectra.Comment: 1+26 pages, 11 figures, 5 tables. v3: references and a few textual
clarifications added. Matches journal versio | Sparticle masses from transverse mass kinks at the LHC: the case of
Yukawa-unified SUSY GUTs | sparticle masses from transverse mass kinks at the lhc: the case of yukawa-unified susy guts | explore concrete determinations practicable data. yukawa unified susy guts viability susy breaking terms. susy admit chains susy endpoints relations. kink rely chains. allowing gluino lightest chargino neutralinos stop lighter gluino stop too. worked yukawa unified susy guts offer playground dealing predict susy pages tables. textual clarifications added. matches versio | non_dup | [] |
2135518 | 10.1007/JHEP10(2010)026 | It was argued by Brigante et.al that the lower bound on the ratio of the
shear viscosity to the entropy density in strongly coupled plasma is translated
into microcausality violation in the dual gravitational description. Since
transport properties of the system characterize its infrared dynamics, while
the causality of the theory is determined by its ultraviolet behavior, the
viscosity bound/microcausality link should not be applicable to theories that
undergo low temperature phase transitions. We present an explicit model of
AdS/CFT correspondence that confirms this fact.Comment: 27 pages, 5 figures. References added, typos fixe | Viscosity Bound and Causality in Superfluid Plasma | viscosity bound and causality in superfluid plasma | argued brigante et.al viscosity translated microcausality violation gravitational description. characterize infrared causality ultraviolet viscosity microcausality applicable undergo transitions. correspondence confirms pages figures. typos fixe | non_dup | [] |
2135045 | 10.1007/JHEP10(2010)027 | We study black branes carrying both electric and magnetic charges in
Einstein-Maxwell theory coupled to a dilaton-axion in asymptotically anti de
Sitter space. After reviewing and extending earlier results for the case of
electrically charged branes, we characterise the thermodynamics of magnetically
charged branes. We then focus on dyonic branes in theories which enjoy an
$SL(2,R)$ electric-magnetic duality. Using $SL(2,R)$, we are able to generate
solutions with arbitrary charges starting with the electrically charged
solution, and also calculate transport coefficients. These solutions all
exhibit a Lifshitz-like near-horizon geometry. The system behaves as expected
for a charged fluid in a magnetic field, with non-vanishing Hall conductance
and vanishing DC longitudinal conductivity at low temperatures. Its response is
characterised by a cyclotron resonance at a frequency proportional to the
magnetic field, for small magnetic fields. Interestingly, the DC Hall
conductance is related to the attractor value of the axion. We also study the
attractor flows of the dilaton-axion, both in cases with and without an
additional modular-invariant scalar potential. The flows exhibit intricate
behaviour related to the duality symmetry. Finally, we briefly discuss
attractor flows in more general dilaton-axion theories which do not enjoy
$SL(2,R)$ symmetry.Comment: 56 Pages, 1 figur | Holography of Dyonic Dilaton Black Branes | holography of dyonic dilaton black branes | branes carrying charges einstein maxwell dilaton axion asymptotically sitter space. reviewing extending electrically branes characterise thermodynamics magnetically branes. dyonic branes enjoy duality. charges electrically coefficients. exhibit lifshitz horizon geometry. behaves vanishing hall conductance vanishing longitudinal conductivity temperatures. characterised cyclotron fields. interestingly hall conductance attractor axion. attractor flows dilaton axion modular potential. flows exhibit intricate duality symmetry. briefly attractor flows dilaton axion enjoy pages figur | non_dup | [] |
2137007 | 10.1007/JHEP10(2010)028 | We study isolated, stationary, axially symmetric vortex solutions in
(2+1)-dimensional viscous conformal fluids. The equations describing them can
be brought to the form of three coupled first order ODEs for the radial and
rotational velocities and the temperature. They have a rich space of solutions
characterized by the radial energy and angular momentum fluxes. We do a
detailed study of the phases in the one-parameter family of solutions with no
energy flux. This parameter is the product of the asymptotic vorticity and
temperature. When it is large, the radial fluid velocity reaches the speed of
light at a finite inner radius. When it is below a critical value, the velocity
is everywhere bounded, but at the origin there is a discontinuity. We comment
on turbulence, potential gravity duals, non-viscous limits and non-relativistic
limits.Comment: 39 pages, 10 eps figures, v2: Minor changes, refs, preprint numbe | Vortices in (2+1)d Conformal Fluids | vortices in (2+1)d conformal fluids | stationary axially vortex viscous conformal fluids. describing brought odes rotational velocities temperature. fluxes. flux. asymptotic vorticity temperature. reaches radius. everywhere discontinuity. comment turbulence duals viscous relativistic pages minor refs preprint numbe | non_dup | [] |
2150326 | 10.1007/JHEP10(2010)029 | The Skyrme crystal, a solution of the Skyrme model, is the lowest
energy-per-charge configuration of skyrmions seen so far. Our numerical
investigations show that, as the period in various space directions is changed,
one obtains various other configurations, such as a double square wall, and
parallel vortex-like solutions. We also show that there is a sudden "phase
transition" between a Skyrme crystal and the charge 4 skyrmion with cubic
symmetry as the period is gradually increased in all three space directions.Comment: 13 pages, 6 figures. To be published in JHE | Deformed Skyrme Crystals | deformed skyrme crystals | skyrme skyrme skyrmions far. investigations directions changed obtains configurations vortex solutions. sudden skyrme skyrmion cubic gradually pages figures. | non_dup | [] |
2102627 | 10.1007/JHEP10(2010)030 | Charged particle production has been studied in neutral current deep
inelastic ep scattering with the ZEUS detector at HERA using an integrated
luminosity of 0.44 fb^-1. Distributions of scaled momenta in the Breit frame
are presented for particles in the current fragmentation region. The evolution
of these spectra with the photon virtuality, Q^2, is described in the kinematic
region 10<Q^2<41000 GeV^2. Next-to-leading-order and modified
leading-log-approximation QCD calculations as well as predictions from Monte
Carlo models are compared to the data. The results are also compared to e+e-
annihilation data. The dependences of the pseudorapidity distribution of the
particles on Q^2 and on the energy in the \gamma p system, W, are presented and
interpreted in the context of the hypothesis of limiting fragmentation.Comment: 44 pages, 11 figures, 21 table | Scaled momentum spectra in deep inelastic scattering at HERA | scaled momentum spectra in deep inelastic scattering at hera | neutral inelastic zeus hera luminosity scaled momenta breit fragmentation region. virtuality kinematic monte carlo data. annihilation data. dependences pseudorapidity gamma interpreted limiting pages | non_dup | [] |
2139650 | 10.1007/JHEP10(2010)031 | Boundary conditions in supergravity on a manifold with boundary relate the
bulk gravitino to the boundary supercurrent, and the normal derivative of the
bulk metric to the boundary energy-momentum tensor. In the 3D N=1 setting, we
show that these boundary conditions can be stated in a manifestly
supersymmetric form. We identify the Extrinsic Curvature Tensor Multiplet, and
show that boundary conditions set it equal to (a conjugate of) the boundary
supercurrent multiplet. Extension of our results to higher-dimensional models
(including the Randall-Sundrum and Horava-Witten scenarios) is discussed.Comment: 22 pages. JHEP format; references added; published versio | The supermultiplet of boundary conditions in supergravity | the supermultiplet of boundary conditions in supergravity | supergravity manifold relate gravitino supercurrent tensor. stated manifestly supersymmetric form. extrinsic curvature multiplet conjugate supercurrent multiplet. randall sundrum horava witten scenarios pages. jhep format versio | non_dup | [] |
2116412 | 10.1007/JHEP10(2010)032 | Here we consider the tree level corrections to electroweak (EW) observables
from standard model (SM) particles propagating in generic warped extra
dimensions. The scale of these corrections is found to be dominated by three
parameters, the Kaluza-Klein (KK) mass scale, the relative coupling of the KK
gauge fields to the Higgs and the relative coupling of the KK gauge fields to
fermion zero modes. It is found that 5D spaces that resolve the hierarchy
problem through warping typically have large gauge-Higgs coupling. It is also
found in $D>5$ where the additional dimensions are warped the relative
gauge-Higgs coupling scales as a function of the warp factor. If the warp
factor of the additional spaces is contracting towards the IR brane, both the
relative gauge-Higgs coupling and resulting EW corrections will be large.
Conversely EW constraints could be reduced by finding a space where the
additional dimension's warp factor is increasing towards the IR brane. We
demonstrate that the Klebanov Strassler solution belongs to the former of these
possibilities.Comment: 18 pages, 3 figures (references added) version to appear in JHE | Electroweak Constraints on Warped Geometry in Five Dimensions and Beyond | electroweak constraints on warped geometry in five dimensions and beyond | electroweak observables propagating generic warped extra dimensions. dominated kaluza klein fermion modes. resolve hierarchy warping coupling. warped warp factor. warp contracting brane large. conversely warp brane. klebanov strassler belongs former pages | non_dup | [] |
2109101 | 10.1007/JHEP10(2010)034 | We prove that all open string theory disc amplitudes in a flat background
obey Britto-Cachazo-Feng-Witten (BCFW) on-shell recursion relations, up to a
possible reality condition on a kinematic invariant. Arguments that the same
holds for tree level closed string amplitudes are given as well. Non-adjacent
BCFW-shifts are related to adjacent shifts through monodromy relations for
which we provide a novel CFT based derivation. All possible recursion relations
are related by old-fashioned string duality. The field theory limit of the
analysis for amplitudes involving gluons is explicitly shown to be smooth for
both the bosonic string as well as the superstring. In addition to a proof a
less rigorous but more powerful argument based on the underlying CFT is
presented which suggests that the technique may extend to a much more general
setting in string theory. This is illustrated by a discussion of the open
string in a constant B-field background and the closed string on the level of
the sphere.Comment: 36 + 9 pages text, one figure, v3: added discussion on relation to
old-fashioned factorization, typos corrected, published versio | On-shell Recursion in String Theory | on-shell recursion in string theory | disc amplitudes obey britto cachazo feng witten bcfw recursion reality kinematic invariant. arguments amplitudes well. adjacent bcfw shifts adjacent shifts monodromy derivation. recursion fashioned duality. amplitudes involving gluons explicitly bosonic superstring. rigorous powerful argument extend theory. illustrated pages fashioned factorization typos corrected versio | non_dup | [] |
2134462 | 10.1007/JHEP10(2010)036 | We analyze the importance of flavor effects in models in which leptogenesis
proceeds via the decay of Majorana electroweak triplets. We find that depending
on the relative strengths of gauge and Yukawa reactions the $B-L$ asymmetry can
be sizably enhanced, exceeding in some cases an order of magnitude level. We
also discuss the impact that such effects can have for TeV-scale triplets
showing that as long as the $B-L$ asymmetry is produced by the dynamics of the
lightest such triplet they are negligible, but open the possibility for
scenarios in which the asymmetry is generated above the TeV scale by heavier
states, possibly surviving the TeV triplet related washouts. We investigate
these cases and show how they can be disentangled at the LHC by using Majorana
triplet collider observables and, in the case of minimal type III see-saw
models even through lepton flavor violation observables.Comment: 22 pages, 9 figures, extended discussion on collider phenomenology,
references added. Version matches publication in JHE | Implications of Flavor Dynamics for Fermion Triplet Leptogenesis | implications of flavor dynamics for fermion triplet leptogenesis | analyze flavor leptogenesis proceeds majorana electroweak triplets. strengths yukawa asymmetry sizably exceeding level. triplets asymmetry lightest triplet negligible scenarios asymmetry heavier possibly surviving triplet washouts. disentangled majorana triplet collider observables lepton flavor violation pages collider phenomenology added. matches publication | non_dup | [] |
2136305 | 10.1007/JHEP10(2010)037 | We consider a supersymmetric SU(5) model where two neutrino masses are
obtained via a mixed type I+III seesaw mechanism induced by the component
fields of a single SU(5) adjoint. We have analyzed the phenomenology of the
model paying particular attention to flavour violating processes and dark
matter relic density, assuming universal boundary conditions. We have found
that, for a seesaw scale larger than $10^{12\div 13}$ GeV, BR$(\mu\to e
\gamma)$ is in the reach of the MEG experiment in sizable regions of the
parameter space. On the other side, current bounds on it force BR$(\tau \to \mu
\gamma)$ to be well below the reach of forthcoming experiments, rendering thus
the model disprovable if a positive signal is found. The same bounds still
allow for a sizable positive contribution to $\epsilon_K$, while the CP
violation in the $B_s$ mixing turns out to be too small to account for the
di-muon anomaly reported by the D0 collaboration. Finally, the regions where
the neutralino relic density is within the WMAP bounds can be strongly modified
with respect to the constrained MSSM case. In particular, a peculiar
coannihilation region, bounded from above, can be realized, which allows us to
put an upper bound on the dark matter mass for certain set-ups of the
parameters.Comment: 12 pages, 6 figures; v2: minor changes, comparison with type I and II
seesaws added, references added, version to appear on JHE | Phenomenology of SUSY SU(5) with type I+III seesaw | phenomenology of susy su(5) with type i+iii seesaw | supersymmetric seesaw adjoint. phenomenology paying flavour violating relic universal conditions. seesaw gamma sizable space. bounds gamma forthcoming rendering disprovable found. bounds sizable epsilon violation turns muon anomaly collaboration. neutralino relic wmap bounds constrained mssm case. peculiar coannihilation realized pages minor seesaws | non_dup | [] |
2135312 | 10.1007/JHEP10(2010)038 | The experimental prospects for precise measurements of the leptonic decays
B_u -> tau nu / mu nu, B_s -> mu+ mu-, D -> mu nu and D_s -> mu nu / tau nu are
very promising. Double ratios involving four of these decays can be defined in
which the dependence on the values of the decay constants is essentially
eliminated, thus enabling complementary measurements of the CKM matrix element
V_ub with a small theoretical error. We quantify the experimental error in a
possible future measurement of |V_ub| using this approach, and show that it is
competitive with the anticipated precision from the conventional approaches.
Moreover, it is shown that such double ratios can be more effective than the
individual leptonic decays as a probe of the parameter space of supersymmetric
models. We emphasize that the double ratios have the advantage of using |V_ub|
as an input parameter (for which there is experimental information), while the
individual decays have an uncertainty from the decay constants (e.g. f_B_s),
and hence a reliance on theoretical techniques such as lattice QCD.Comment: 21 pages, 4 figure | Measuring V_ub and probing SUSY with double ratios of purely leptonic
decays of B and D mesons | measuring v_ub and probing susy with double ratios of purely leptonic decays of b and d mesons | prospects precise leptonic decays promising. involving decays essentially eliminated enabling complementary error. quantify competitive anticipated precision approaches. leptonic decays supersymmetric models. emphasize advantage decays e.g. reliance pages | non_dup | [] |