pinecone/core-2020-05-10-deduplication huggingface dataset:
The Brown-York mass of black holes in Warped Anti-de Sitter space

We give a direct computation of the mass of black holes in Warped Anti-de Sitter space (WAdS) in terms of the Brown-York stress-tensor at the boundary. This permits to explore to what extent the holographic renormalization techniques can be applied to such type of deformation of AdS. We show that, despite some components of the boundary stress-tensor diverge and resist to be regularized by the introduction of local counterterms, the precise combination that gives the quasilocal energy density yields a finite integral. The result turns out to be in agreement with previous computations of the black hole mass obtained with different approaches. This is seen to happen both in the case of Topologically Massive Gravity and of the so-called New Massive Gravity. Here, we focus our attention on the latter. We observe that, despite other conserved charges diverge in the near boundary limit, the finite part in the large radius expansion captures the physically relevant contribution. We compute the black hole angular momentum in this way and we obtain a result that is in perfect agreement with previous calculations.Fil: Giribet, Gaston Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina; Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina; Pontificia Universidad Catolica de Valparaiso. Instituto de Física; Chile;Fil: Goya, Andrés Fabio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina
Supersymmetry and BPS States on D4-brane in Large C-field Background

In this paper, we continue our previous study of the low energy effective
theory for D4-brane in the large C-field background. The gauge field part of
the effective action was found in an earlier work. In this paper, we focus on
the matter field part of the action and the supersymmetry transformation.
Moreover, we calculate the central charges of super algebra and extensively
study BPS solutions of this effective theory. The BPS states considered in this
paper include light-like gauge field configurations, the F1 ending on D4
solution, tilted D4-brane, BPS solution with two types of magnetic charges (D2
ending on D4), holomorphic embedding of D4-brane and the intersection of two
D4-branes along a 2-brane.Comment: v1: 23 pages ; v2: 24 pages, references and footnote added. v3: few
  sentences rewritin
NLO corrections to squark-squark production and decay at the LHC

We present the analysis of the signature 2j + ETmiss (+X) via squark-squark
production and direct decay into the lightest neutralino, pp -> squark squark
-> j j chi_1^0 chi_1^0 (+X), in next-to-leading order QCD within the framework
of the minimal supersymmetric standard model. In our approximation the produced
squarks are treated on shell. Thus, the calculation of production and decay
factorizes. In this way, we provide a consistent, fully differential
calculation of NLO QCD factorizable corrections to the given processes.
Clustering final states into partonic jets, we investigate the experimental
inclusive signature 2j + ETmiss for several benchmark scenarios. We compare
resulting differential distributions with leading-order approximations rescaled
by a flat K-factor and examine a possible impact for cut-and-count searches for
supersymmetry at the LHC.Comment: 42 pages, 15 figures; to be published in JHE
Topological lattice actions for the 2d XY model

We consider the 2d XY Model with topological lattice actions, which are invariant against small deformations of the field configuration. These actions constrain the angle between neighbouring spins by an upper bound, or they explicitly suppress vortices (and anti-vortices). Although topological actions do not have a classical limit, they still lead to the universal behaviour of the Berezinskii-Kosterlitz-Thouless (BKT) phase transition — at least up to moderate vortex suppression. In the massive phase, the analytically known Step Scaling Function (SSF) is reproduced in numerical simulations. However, deviations from the expected universal behaviour of the lattice artifacts are observed. In the massless phase, the BKT value of the critical exponent ηc is confirmed. Hence, even though for some topological actions vortices cost zero energy, they still drive the standard BKT transition. In addition we identify a vortex-free transition point, which deviates from the BKT behaviour
New coset matrix for D=6 self-dual supergravity

Toroidal reduction of minimal six-dimensional supergravity, minimal
five-dimensional supergravity and four-dimensional Einstein-Maxwell gravity to
three dimensions gives rise to a sequence of cosets $O(4,3)/(O(4)\times
O(3))\supset G_{2(2)}/(SU(2)\times SU(2))\supset SU(2,1)/S(U(2)\times U(1))$
which are invariant subspaces of each other. The known matrix representations
of these cosets, however, are not suitable to realize these embeddings which
could be useful for solution generation. We construct a new representation of
the largest coset in terms of $7\times 7$ real symmetric matrices and show how
to select invariant subspaces corresponding to lower cosets by algebraic
constraints. The new matrix representative may be also directly applied to
minimal five-dimensional supergravity. Due to full O(4,3) covariance it is
simpler than the one derived by us previously for the coset
$G_{2(2)}/(SU(2)\times SU(2))$.Comment: Section "Outlook" and refs. 10,23 edited. Relation to Sen's work is
  clarified in section 2. Journal versio
125 GeV Higgs Boson and the Type-II Seesaw Model

We study the vacuum stability and unitarity conditions for a 125 GeV Standard
Model (SM)-like Higgs boson mass in the type-II seesaw model. We find that, as
long as the seesaw scale is introduced below the SM vacuum instability bound,
there exists a large parameter space predicting a 125 GeV Higgs mass,
irrespective of the exact value of the seesaw scale, satisfying both stability
and unitarity conditions up to the Planck scale. We also study the model
predictions for the Higgs partial decay widths in the diphoton and Z+photon
channels with respect to their SM expectations and find that the decay rates
for these two processes are correlated. We further show that for any given
enhancement in the Higgs-to-diphoton rate over its SM expectation, there exists
an upper bound on the type-II seesaw scale, and hence, on the masses of the
associated doubly- and singly-charged Higgs bosons in the allowed parameter
space. For instance, if more than 10% enhancement persists in the
Higgs-to-diphoton channel, the upper limit on the type-II seesaw scale is about
450 GeV which is completely within the reach of the 14 TeV LHC. We believe this
to be an encouraging result for the experimental searches of the singly- and
doubly-charged Higgs bosons which, in combination with improved sensitivity in
the Higgs-to-diphoton and Higgs-to-Z+photon signal strengths, could probe the
entire allowed parameter space of the minimal type-II seesaw model, and
establish/eliminate it as a single viable extension of the SM.Comment: 29 pages, 7 figures, 2 tables; corrected Eq. (5.11) and related
  discussion, updated Table 2 and Figures 5-
Duality rotations in supersymmetric nonlinear electrodynamics revisited

We revisit the U(1) duality-invariant nonlinear models for N=1 and N=2 vector
multiplets coupled to off-shell supergravities. For such theories we develop
new formulations which make use of auxiliary chiral superfields (spinor in the
N=1 case and scalar for N=2) and are characterized by the remarkable property
that U(1) duality invariance is equivalent to the manifest U(1) invariance of
the self-interaction. Our construction is inspired by the non-supersymmetric
approach that was proposed by Ivanov and Zupnik a decade ago and recently
re-discovered in the form of twisted self-duality.Comment: 22 pages. V2: references and comments adde
A Complete Model of Low-Scale Gauge Mediation

Recent signs of a Standard Model-like Higgs at 125 GeV point towards large
A-terms in the MSSM. This presents special challenges for gauge mediation,
which by itself predicts vanishing A-terms at the messenger scale. In this
paper, we review the general problems that arise when extending gauge mediation
to achieve large A-terms, and the mechanisms that exist to overcome them. Using
these mechanisms, we construct weakly-coupled models of low-scale gauge
mediation with extended Higgs-messenger couplings that generate large A-terms
at the messenger scale and viable mu/B_mu-terms. Our models are simple,
economical, and complete realizations of supersymmetry at the weak scale.Comment: 33 pages; v2: refs added, minor change
Entangled Dilaton Dyons

Einstein-Maxwell theory coupled to a dilaton is known to give rise to
extremal solutions with hyperscaling violation. We study the behaviour of these
solutions in the presence of a small magnetic field. We find that in a region
of parameter space the magnetic field is relevant in the infra-red and
completely changes the behaviour of the solution which now flows to an
$AdS_2\times R^2$ attractor. As a result there is an extensive ground state
entropy and the entanglement entropy of a sufficiently big region on the
boundary grows like the volume. In particular, this happens for values of
parameters at which the purely electric theory has an entanglement entropy
growing with the area, $A$, like $A \log(A)$ which is believed to be a
characteristic feature of a Fermi surface. Some other thermodynamic properties
are also analysed and a more detailed characterisation of the entanglement
entropy is also carried out in the presence of a magnetic field. Other regions
of parameter space not described by the $AdS_2\times R^2$ end point are also
discussed.Comment: Some comments regarding comparison with weakly coupled Fermi liquid
  changed, typos corrected and caption of a figure modifie
"L=R" - $U(1)_R$ as the Origin of Leptonic 'RPV'

A classification of phenomenologically interesting supersymmetric extensions
of the Standard-Model with a $U(1)_R$ symmetry is presented. Some of these are
consistent with subsets of leptonic or baryonic "R-parity violating" (RPV)
operators, thereby providing a natural motivation for them. We then focus on a
particular class of models in which the $U(1)_R$ symmetry coincides with lepton
number when restricted to the SM sector. In this case, the extension of lepton
number to the superpartners is "non-standard", implying, in particular, the
existence of the leptonic RPV operators $LLE^c$ and $LQD^c$, and a vacuum
structure where one of the left-handed sneutrinos acquires a significant
vacuum-expectation-value, while not being constrained by neutrino mass bounds.
The model can be naturally consistent with bounds from electroweak precision
measurements and flavor-changing processes. It can also easily accommodate the
recently measured Higgs mass due to the existence of a scalar triplet that
couples to the Higgs with an order one coupling, with only moderate
fine-tuning. The phenomenology is rather rich and distinctive, with features
such as heavy-but-natural Dirac gauginos, relaxed bounds on squarks, resonant
slepton/sneutrino production, lepto-quark signals, as well as an interesting
connection to neutrino physics arising from R-breaking. The broad qualitative
features are discussed in this paper, with a more detailed phenomenological
study carried out in a companion paper Frugiuele et al. (2012).Comment: 44 pages, 5 figures, references adde
Revisiting random tensor models at large N via the Schwinger-Dyson
  equations

The Schwinger-Dyson Equations (SDEs) of matrix models are known to form
(half) a Virasoro algebra and have become a standard tool to solve matrix
models. The algebra generated by SDEs in tensor models (for random tensors in a
suitable ensemble) is a specific generalization of the Virasoro algebra and it
is important to show that these new symmetries determine the physical
solutions. We prove this result for random tensors at large N. Compared to
matrix models, tensor models have more than a single invariant at each order in
the tensor entries and the SDEs make them proliferate. However, the specific
combinatorics of the dominant observables allows to restrict to linear SDEs and
we show that they determine a unique physical perturbative solution. This gives
a new proof that tensor models are Gaussian at large N, with the covariance
being the full 2-point function.Comment: 17 pages, many figure
Generalized Skyrmions in QCD and the Electroweak Sector

We discuss the stability and masses of topological solitons in QCD and
strongly-interacting models of electroweak symmetry breaking with arbitrary
combinations of two inequivalent Lagrangian terms of fourth order in the field
spatial derivatives. We find stable solitons for only a restricted range of the
ratio of these combinations, in agreement with previous results, and we
calculate the corresponding soliton masses. In QCD, the experimental
constraints on the fourth-order terms force the soliton to resemble the
original Skyrmion solution. However, this is not necessarily the case in
strongly-interacting models of electroweak symmetry breaking, in which a
non-Skyrmion-like soliton is also possible. This possibility will be
constrained by future LHC measurements and dark matter experiments. Current
upper bounds on the electroweak soliton mass range between 18 and 59 TeV, which
would be reduced to 4.6 to 8.1 TeV with the likely sensitivity of LHC data to
the fourth-order electroweak Lagrangian parameters.Comment: 19 pages, 6 pdf figures, version accepted in JHE
On the Higgs Fit and Electroweak Phase Transition

We consider the Higgs portal through which light scalars contribute both to
the Higgs production and decay and Higgs effective potential at finite
temperature via quantum loops. The positive Higgs portal coupling required by a
strongly first order electroweak phase transition is disfavored by the current
Higgs data if we consider one such scalar. We observe that by introducing a
second scalar with negative Higgs portal coupling, one can not only improve the
Higgs fits, but also enhance the strength of first order EWPT. We apply this
mechanism to the light stop scenario for electroweak baryogenesis in the MSSM
and find a light sbottom could play the role as the second scalar, which allows
the stop to be relatively heavier. Non-decoupled effects on the Higgs or
sbottom self-interactions from physics beyond MSSM is found to be indispensable
for this scenario to work. A clear prediction from the picture is the existence
of a light sbottom (below 200 GeV) and a light stop (can be as heavy as 140
GeV), which can be directly tested in the near future.Comment: 15 pages, 5 figure
Correlators of massive string states with conserved currents

We calculate correlation functions of the R-current or the stress-energy
tensor T_{\mu\nu} with two non-protected operators dual to generic massive
string states with rotation in S^5, in the context of the AdS/CFT
correspondence. Field theory Ward identities make predictions about the
all-loop behaviour of these correlators. In particular, they restrict the
fusion coefficient to be proportional to the R-charge of the operators or to
their dimension, respectively, with certain coefficients of proportionality. We
reproduce these predictions, at strong coupling, using string theory.
Furthermore, we point out that the recently observed strong coupling
factorisation of 4-point correlators is consistent with conformal symmetry and
puts constraints on the strong coupling expressions of 4-point correlators
involving R-currents or the stress-energy tensor.Comment: 17 pages,comments and reference adde
Maxwell-like Lagrangians for higher spins

We show how implementing invariance under divergence-free gauge
transformations leads to a remarkably simple Lagrangian description of massless
bosons of any spin. Our construction covers both flat and (A)dS backgrounds and
extends to tensors of arbitrary mixed-symmetry type. Irreducible and traceless
fields produce single-particle actions, while whenever trace constraints can be
dispensed with the resulting Lagrangians display the same reducible,
multi-particle spectra as those emerging from the tensionless limit of free
open-string field theory. For all explored options the corresponding kinetic
operators take essentially the same form as in the spin-one, Maxwell case.Comment: 77 pages, revised version. Erroneous interpretation and proof of the
  gauge-fixing procedure for mixed-symmetry fields corrected. As a consequence,
  the mixed-symmetry, one-particle Lagrangians are to be complemented with
  conditions on the divergences of the fields; all other conclusions unchanged.
  Additional minor changes including references added. To appear in JHE
Electromagnetic quasinormal modes of rotating black strings and the
  AdS/CFT correspondence

We investigate the quasinormal spectrum of electromagnetic perturbations of
rotating black strings. Among the solutions of Einstein equations in the
presence of a negative cosmological constant there are asymptotically anti-de
Sitter (AdS) black holes whose horizons have the topology of a cylinder. The
stationary version of these AdS black holes represents rotating black strings.
The conformal field theory (CFT) dual of a black string lives in a Minkowski
space with a compact dimension. On the basis of the AdS/CFT duality, we
interpret a CFT plasma moving with respect to the preferred rest frame
introduced by the topology as the holographic dual to a rotating black string.
We explore the consequences of this correspondence by investigating the
electromagnetic perturbations of a black string for different rotation
parameter values. As usual the electromagnetic quasinormal modes (QNM)
correspond to the poles of retarded Green's functions of $R$-symmetry currents
in the boundary field theory. The hydrodynamic regime of the QNM dispersion
relations are analytically studied. Finally, we investigate numerically the
effect of rotation on all the family of black-string electromagnetic
quasinormal modes. We interpret these results from the CFT perspective and
notice the emergence of effects like Doppler shift of the frequencies and
dilation of the thermalization times.Comment: 25 pages; minor typos corrected; final version for JHE
LHC diphoton and Z+photon Higgs signals in the Higgs triplet model with Y = 0

We study the implications of the LHC diphoton and Z+photon Higgs signals on the Higgs triplet model with Y=0, which predicts two neutral CP-even Higgs bosons h , H and a pair of charged Higgs H ± . We discuss three different scenarios: (i) the observed boson is the light Higgs boson h ; (ii) it is the heavy Higgs boson H ; (iii) the observed signal is from the almost degenerate h and H . We find that the inclusive Higgs diphoton rates in the first two scenarios can be enhanced or suppressed compared to the SM value, which can respectively fit the ATLAS and CMS diphoton data within 1 σ range. The inclusive ZZ * rates are suppressed, which are outside 1 σ range of ATLAS data and within 1 σ range of CMS data. Meanwhile, another CP-even Higgs boson production rate can be suppressed enough not to be observed at the collider. For the third scenario, the Higgs diphoton rate is suppressed, which is outside 1 σ range of ATLAS data, and the ZZ * rate equals to SM value approximately. In addition, we find that the two rates of h → γγ and h → Zγ have the positive correlations for the three scenarios
Measurement of charged jet suppression in Pb-Pb collisions at √sNN = 2.76 TeV

A measurement of the transverse momentum spectra of jets in Pb–Pb collisions at √ sNN = 2.76 TeV is reported. Jets are reconstructed from charged particles using the anti-kT jet algorithm with jet resolution parameters R of 0.2 and 0.3 in pseudorapidity |η| &lt; 0.5. The transverse momentum pT of charged particles is measured down to 0.15 GeV/c which gives access to the low pT fragments of the jet. Jets found in heavy-ion collisions are corrected event-by-event for average background density and on an inclusive basis (via unfolding) for residual background fluctuations and detector effects. A strong suppression of jet production in central events with respect to peripheral events is observed. The suppression is found to be similar to the suppression of charged hadrons, which suggests that substantial energy is radiated at angles larger than the jet resolution parameter R = 0.3 considered in the analysis. The fragmentation bias introduced by selecting jets with a high pT leading particle, which rejects jets with a soft fragmentation pattern, has a similar effect on the jet yield for central and peripheral events. The ratio of jet spectra with R = 0.2 and R = 0.3 is found to be similar in Pb–Pb and simulated PYTHIA pp events, indicating no strong broadening of the radial jet structure in the reconstructed jets with R &lt; 0.3
Supergravity as generalised geometry II: E d ( d ) × ℝ + and M theory

We reformulate eleven-dimensional supergravity, including fermions, in terms of generalised geometry, for spacetimes that are warped products of Minkowski space with a d -dimensional manifold M with d ≤ 7. The reformulation has an E d ( d ) × ℝ + structure group and it has a local $ {{\widetilde{H}}_d} $ symmetry, where $ {{\widetilde{H}}_d} $ is the double cover of the maximally compact subgroup of E d ( d ) . The bosonic degrees for freedom unify into a generalised metric, and, defining the generalisked analogue D of the Levi-Civita connection, one finds that the corresponding equations of motion are the vanishing of the generalised Ricci tensor. To leading order, we show that the fermionic equations of motion, action and supersymmetry variations can all be written in terms of D . Although we will not give the detailed decompositions, this reformulation is equally applicable to type IIA or IIB supergravity restricted to a ( d − 1)-dimensional manifold. For completeness we give explicit expressions in terms of $ {{\widetilde{H}}_4} $ = Spin(5) and $ {{\widetilde{H}}_7} $ = SU(8) representations for d = 4 and d = 7
Insane anti-Membranes?

The backreactions of anti-branes on a variety of supergravity backgrounds have been shown in a recent series of papers to be riled by some unexplained flux singularities. All of the situations studied so far involve backgrounds with (close to) AdS-asymptotics. It is the purpose of this work to study the backreaction of anti-M2 branes on a background exhibiting a different UV behavior: the so-called $ \mathbb{A} $ 8 regular solution of eleven-dimensional supergravity that we consider has “Taub-NUT type” asymptotics. As it turns out, some subleading infrared singularities are inevitable; they cannot be naturally ascribed to the anti-branes backreacting on this background. Moreover, our configuration does not involve smeared branes. This lends further credence to the work of Bena et al. [33] suggesting that the singularities encountered are in no way remnants of smearing that would wash away once brane polarization is taken into account
Reformulating the TBA equations for the quark anti-quark potential and
  their two loop expansion

The boundary thermodynamic Bethe Ansatz (BTBA) equations introduced in
arXiv:1203.1913 and arXiv:1203.1617 to describe the cusp anomalous dimension
contain imaginary chemical potentials and singular boundary fugacities, which
make its systematic expansion problematic. We propose an alternative
formulation based on real chemical potentials and additional source terms. We
expand our equations to double wrapping order and find complete agreement with
the direct two-loop gauge theory computation of the cusp anomalous dimension.Comment: pdflatex, 30 pages, 1 figur