pinecone/core-2020-05-10-deduplication huggingface dataset:
Ordinary-derivative formulation of conformal totally symmetric arbitrary
  spin bosonic fields

Conformal totally symmetric arbitrary spin bosonic fields in flat space-time
of even dimension greater than or equal to four are studied. Second-derivative
(ordinary-derivative) formulation for such fields is developed. We obtain gauge
invariant Lagrangian and the corresponding gauge transformations. Gauge
symmetries are realized by involving the Stueckelberg and auxiliary fields.
Realization of global conformal boost symmetries on conformal gauge fields is
obtained. Modified de Donder gauge condition and de Donder-Stueckelberg gauge
condition are introduced. Using the de Donder-Stueckelberg gauge frame,
equivalence of the ordinary-derivative and higher-derivative approaches is
demonstrated. On-shell degrees of freedom of the arbitrary spin conformal field
are analyzed. Ordinary-derivative light-cone gauge Lagrangian of conformal
fields is also presented. Interrelations between the ordinary-derivative gauge
invariant formulation of conformal fields and the gauge invariant formulation
of massive fields are discussed.Comment: 51 pages, v2: Results and conclusions of v1 unchanged. In Sec.3,
  brief review of higher-derivative approaches added. In Sec.4, new
  representations for Lagrangian, modified de Donder gauge, and de
  Donder-Stueckelberg gauge added. In Sec.5, discussion of interrelations
  between the ordinary-derivative and higher-derivative approaches added.
  Appendices A,B,C,D and references adde
Dispersive analysis of the scalar form factor of the nucleon

Based on the recently proposed Roy-Steiner equations for pion-nucleon scattering, we derive a system of coupled integral equations for the pi pi --> N-bar N and K-bar K --> N-bar N S-waves. These equations take the form of a two-channel Muskhelishvili-Omnes problem, whose solution in the presence of a finite matching point is discussed. We use these results to update the dispersive analysis of the scalar form factor of the nucleon fully including K-bar K intermediate states. In particular, we determine the correction Delta_sigma=sigma(2M_pi^2)-sigma_{pi N}, which is needed for the extraction of the pion-nucleon sigma term from pi N scattering, as a function of pion-nucleon subthreshold parameters and the pi N coupling constant
The Energy Loss of a Heavy Quark Moving in a Viscous Fluid

To study the rate of energy and momentum loss of a heavy quark in QGP,
specifically in the hydrodynamic regime, we use fluid/gravity duality and
construct a perturbative procedure to find the string solution in gravity side.
We show that by this construction the drag force exerted on the quark can be
computed perturbatively, order by order in a boundary derivative expansion. At
ideal order, our result is just the drag force exerted on a moving quark in
thermal plasma with thermodynamics variables promoted to become local functions
of space and time. Furthermore, we apply this procedure to a transverse quark
in Bjorken flow and compute the first-derivative corrections, namely the
viscous corrections, to the drag force.Comment: 33 pages, 6 figures, references added v5: Some correction
Inconsistency of Breathing Mode Extensions of Maximal Five-Dimensional
  Supergravity Embedding

Recent work on consistent Kaluza-Klein reductions on Einstein-Sasaki spaces
prompted an intriguing conjecture that there might exist a consistent $S^5$
reduction of type IIB supergravity to give five-dimensional ${\cal N}=8$ gauged
supergravity coupled to a massive supermultiplet that includes the
breathing-mode scalar. Motivated by this, we investigate the possibility of
augmenting the usual ${\cal N}=8$ supergravity reduction to include a
breathing-mode scalar, and we show that this is in fact inconsistent. The
standard reduction to the massless ${\cal N}=8$ supermultiplet depends for its
consistency on a delicate interplay between properties of the ten-dimensional
type IIB theory and properties of the Killing vectors on $S^5$. Our
calculations show that turning on the breathing-mode is sufficient to destroy
the balance, and hence render the reduction inconsistent.Comment: 16 page
Rotating black rings on Taub-NUT

In this paper, we construct new solutions describing rotating black rings on
Taub-NUT using the inverse-scattering method. These are five-dimensional vacuum
space-times, generalising the Emparan-Reall and extremal Pomeransky-Sen'kov
black rings to a Taub-NUT background space. When reduced to four dimensions in
Kaluza-Klein theory, these solutions describe (possibly rotating) electrically
charged black holes in superposition with a finitely separated magnetic
monopole. Various properties of these solutions are studied, from both a five-
and four-dimensional perspective.Comment: 33 pages, 3 figures, LaTe
One-Loop BPS amplitudes as BPS-state sums

Recently, we introduced a new procedure for computing a class of one-loop
BPS-saturated amplitudes in String Theory, which expresses them as a sum of
one-loop contributions of all perturbative BPS states in a manifestly T-duality
invariant fashion. In this paper, we extend this procedure to all BPS-saturated
amplitudes of the form \int_F \Gamma_{d+k,d} {\Phi}, with {\Phi} being a weak
(almost) holomorphic modular form of weight -k/2. We use the fact that any such
{\Phi} can be expressed as a linear combination of certain absolutely
convergent Poincar\'e series, against which the fundamental domain F can be
unfolded. The resulting BPS-state sum neatly exhibits the singularities of the
amplitude at points of gauge symmetry enhancement, in a chamber-independent
fashion. We illustrate our method with concrete examples of interest in
heterotic string compactifications.Comment: 42 pages; v4: a few misprints correcte
Uncovering the Charming Higgs at the LHC

We study the observability of the Higgs boson in the "charming Higgs" model.
In this model the Higgs boson primarily undergoes a cascade decay to four charm
quarks via light intermediate pseudoscalars. Such a decay allows the Higgs
boson to escape the most stringent LEP bounds on the Standard Model Higgs boson
mass. If the light pseudoscalars are sufficiently light they become highly
boosted and their decay products collimated into jets. We show that by using
jet substructure techniques, this model is potentially observable at the LHC.
For a Higgs boson mass of 100 GeV and light pseudoscalar mass of 12 GeV, we
find a signal significance of 3.8 sigma with a luminosity of 30 fb^-1 and that
a 5 sigma significance can be obtained with 50 fb^-1 of luminosity at the 14
TeV LHC.Comment: 11 pages, 8 figures. Discussion added to the conclusion, typos
  corrected, and references update
Degeneration of Groups of Type E7 and Minimal Coupling in Supergravity

We study properties of D = 4, N >1 extended supergravities (and related
compactifications of superstring theory) and their consistent truncation to the
phenomenologically interesting models of N = 1 supergravity. This involves a
detailed classification of the "degenerations" of the duality groups of type
E7, when the corresponding quartic invariant polynomial built from the
symplectic irreducible representation of G4 "degenerates" into a perfect
square. With regard to cosmological applications, we conclude that the
consistent truncation to N = 1 from higher-dimensional or higher-N theory gives
a zero measure minimal coupling of vectors. A non-minimal coupling involving
vectors coupled to scalars and axions is generic. These features of
supergravity, following from the electric-magnetic duality, may be useful in
other applications, like stabilization of moduli, and in studies of
non-perturbative black-hole solutions of supergravity/string theory.Comment: 1+40 pages, 5 Tables; v2 : 1+41 pages, Sec. 3 extended, Sec. 3.1
  replaced, Sec. 4.3 removed, one Ref. added, other minor change
The Conformal Anomaly of M5-Branes

We show that the conformal anomaly for N M5-branes grows like $N^3$. The
method we employ relates Coulomb branch interactions in six dimensions to
interactions in four dimensions using supersymmetry. This leads to a relation
between the six-dimensional conformal anomaly and the conformal anomaly of N=4
Yang-Mills. Along the way, we determine the structure of the four derivative
interactions for the toroidally compactified (2,0) theory, while encountering
interesting novelties in the structure of the six derivative interactions.Comment: 38 pages, LaTeX; references adde
3-loop 3PI effective action for 3D SU(3) QCD

The 3PI method is a technique to resum an infinite class of diagrams, which
may be useful in studying nonperturbative thermodynamics and dynamics in
quantum field theory. But it has never been successfully applied to gauge
theories, where there are serious questions about gauge invariance breaking. We
show how to perform the 3PI resummation of QCD in 3 Euclidean spacetime
dimensions, a warmup problem to the 4 or 3+1 dimensional case. We present the
complete details of the technical problems and how they are overcome. We
postpone a comparison of gauge invariant correlation functions with their
lattice-determined counterparts to a future publication.Comment: 44 pages, 13 figures. Version as it appears in JHEP, including the
  corrected Figure 1
The Spin of Holographic Electrons at Nonzero Density and Temperature

We study the Green's function of a gauge invariant fermionic operator in a
strongly coupled field theory at nonzero temperature and density using a dual
gravity description. The gravity model contains a charged black hole in four
dimensional anti-de Sitter space and probe charged fermions. In particular, we
consider the effects of the spin of these probe fermions on the properties of
the Green's function. There exists a spin-orbit coupling between the spin of an
electron and the electric field of a Reissner-Nordstrom black hole. On the
field theory side, this coupling leads to a Rashba like dispersion relation. We
also study the effects of spin on the damping term in the dispersion relation
by considering how the spin affects the placement of the fermionic quasinormal
modes in the complex frequency plane in a WKB limit. An appendix contains some
exact solutions of the Dirac equation in terms of Heun polynomials.Comment: 27 pages, 11 figures; v2: minor changes, published versio
Decoupling heavy sparticles in Effective SUSY scenarios: Unification,
  Higgs masses and tachyon bounds

Using two-loop renormalization group equations implementing the decoupling of
heavy scalars, Effective SUSY scenarios are studied in the limit in which there
is a single low energy Higgs field. Gauge coupling unification is shown to hold
with similar or better precision than in standard MSSM scenarios. b-tau
unification is examined, and Higgs masses are computed using the effective
potential, including two-loop contributions from scalars. A 125 GeV Higgs is
compatible with stops/sbottoms at around 300 GeV with non-universal boundary
conditions at the scale of the heavy sparticles if some of the trilinear
couplings at this scale take values of the order of 1-2 TeV; if more
constrained boundary conditions inspired by msugra or gauge mediation are set
at a higher scale, heavier colored sparticles are required in general. Finally,
since the decoupled RG flow for third-generation scalar masses departs very
significantly from the MSSM DR-bar one, tachyon bounds for light scalars are
revisited and shown to be relaxed by up to a TeV or more.Comment: 35 pages, 17 figures. v2: Updated some scans, allowing for changes in
  sign of some parameters, minor improvements. v3: Typos corrected in formulae
  in the appendices, added some clarifying remarks about flavor mixing being
  ignore
Strong subadditivity and the covariant holographic entanglement entropy
  formula

Headrick and Takayanagi showed that the Ryu-Takayanagi holographic
entanglement entropy formula generally obeys the strong subadditivity (SSA)
inequality, a fundamental property of entropy. However, the Ryu-Takayanagi
formula only applies when the bulk spacetime is static. It is not known whether
the covariant generalization proposed by Hubeny, Rangamani, and Takayanagi
(HRT) also obeys SSA. We investigate this question in three-dimensional
AdS-Vaidya spacetimes, finding that SSA is obeyed as long as the bulk spacetime
satisfies the null energy condition. This provides strong support for the
validity of the HRT formula.Comment: 38 page
A double coset ansatz for integrability in AdS/CFT

We give a proof that the expected counting of strings attached to giant
graviton branes in AdS_5 x S^5, as constrained by the Gauss Law, matches the
dimension spanned by the expected dual operators in the gauge theory. The
counting of string-brane configurations is formulated as a graph counting
problem, which can be expressed as the number of points on a double coset
involving permutation groups. Fourier transformation on the double coset
suggests an ansatz for the diagonalization of the one-loop dilatation operator
in this sector of strings attached to giant graviton branes. The ansatz agrees
with and extends recent results which have found the dynamics of open string
excitations of giants to be given by harmonic oscillators. We prove that it
provides the conjectured diagonalization leading to harmonic oscillators.Comment: 33 pages, 3 figures; v2: references adde
Perturbations in Massive Gravity Cosmology

We study cosmological perturbations for a ghost free massive gravity theory
formulated with a dynamical extra metric that is needed to massive deform GR.
In this formulation FRW background solutions fall in two branches. In the
dynamics of perturbations around the first branch solutions, no extra degree of
freedom with respect to GR ispresent at linearized level, likewise what is
found in the Stuckelberg formulation of massive gravity where the extra metric
isflat and non dynamical. In the first branch, perturbations are probably
strongly coupled. On the contrary, for perturbations around the second branch
solutions all expected degrees of freedom propagate. While tensor and vector
perturbations of the physical metric that couples with matter follow closely
the ones of GR, scalars develop an exponential Jeans-like instability on
sub-horizon scales. On the other hand, around a de Sitter background there is
no instability. We argue that one could get rid of the instabilities by
introducing a mirror dark matter sector minimally coupled to only the second
metric.Comment: 18 pages, 1 figure. Final version published in JHEP. arXiv admin
  note: substantial text overlap with arXiv:1111.198
Charging axisymmetric space-times with cosmological constant

Ernst's solution generating technique for adding electromagnetic charge to
axisymmetric space-times in general relativity is generalised in presence of
the cosmological constant. Ernst equations for complex potentials are found and
they are traced back to an affective dual complex dynamical system, whose
symmetries are studied. In particular this method is able to generate charged,
asymptotically (A)dS black holes from their uncharged version: as an example,
it is shown explicitly how to pass from the Kerr-(A)dS to the Kerr-Newman-(A)dS
metric. A new solution describing a magnetic universe in presence of the
cosmological constant is also generated.Comment: 15 pages, v2: typos correcte
QCD parton showers and NLO EW corrections to Drell-Yan

We report on the implementation of an interface between the SANC generator
framework for Drell-Yan hard processes, which includes next-to-leading order
electroweak (NLO EW) corrections, and the Herwig++ and Pythia8 QCD parton
shower Monte Carlos. A special aspect of this implementation is that the
initial-state shower evolution in both shower generators has been augmented to
handle the case of an incoming photon-in-a-proton, diagrams for which appear at
the NLO EW level. The difference between shower algorithms leads to residual
differences in the relative corrections of 2-3% in the p_T(mu) distributions at
p_T(mu)>~50 GeV (where the NLO EW correction itself is of order 10%).Comment: 20 pages, 12 postscript figures, uses axodraw.sty, feynmf,
  subfiles.st
Singular ways to search for the Higgs boson

The discovery or exclusion of the fundamental standard scalar is a hot topic,
given the data of LEP, the Tevatron and the LHC, as well as the advanced status
of the pertinent theoretical calculations. With the current statistics at the
hadron colliders, the workhorse decay channel, at all relevant H masses, is H
to WW, followed by W to light leptons. Using phase-space singularity
techniques, we construct and study a plethora of "singularity variables" meant
to facilitate the difficult tasks of separating signal and backgrounds and of
measuring the mass of a putative signal. The simplest singularity variables are
not invariant under boosts along the collider's axes and the simulation of
their distributions requires a good understanding of parton distribution
functions, perhaps not a serious shortcoming during the boson hunting season.
The derivation of longitudinally boost-invariant variables, which are functions
of the four charged-lepton observables that share this invariance, is quite
elaborate. But their use is simple and they are, in a kinematical sense,
optimal.Comment: 19 pages, including 21 figure
Bubbles and jackets: new scaling bounds in topological group field
  theories

We use a reformulation of topological group field theories in 3 and 4
dimensions in terms of variables associated to vertices, in 3d, and edges, in
4d, to obtain new scaling bounds for their Feynman amplitudes. In both 3 and 4
dimensions, we obtain a bubble bound proving the suppression of singular
topologies with respect to the first terms in the perturbative expansion (in
the cut-off). We also prove a new, stronger jacket bound than the one currently
available in the literature. We expect these results to be relevant for other
tensorial field theories of this type, as well as for group field theory models
for 4d quantum gravity.Comment: v2: Minor modifications to match published versio
A Shift Symmetry in the Higgs Sector: Experimental Hints and Stringy
  Realizations

We interpret reported hints of a Standard Model Higgs boson at ~ 125 GeV in
terms of high-scale supersymmetry breaking with a shift symmetry in the Higgs
sector. More specifically, the Higgs mass range suggested by recent LHC data
extrapolates, within the (non-supersymmetric) Standard Model, to a vanishing
quartic Higgs coupling at a UV scale between 10^6 and 10^18 GeV. Such a small
value of lambda can be understood in terms of models with high-scale SUSY
breaking if the Kahler potential possesses a shift symmetry, i.e., if it
depends on H_u and H_d only in the combination (H_u+\bar{H}_d). This symmetry
is known to arise rather naturally in certain heterotic compactifications. We
suggest that such a structure of the Higgs Kahler potential is common in a
wider class of string constructions, including intersecting D7- and D6-brane
models and their extensions to F-theory or M-theory. The latest LHC data may
thus be interpreted as hinting to a particular class of compactifications which
possess this shift symmetry.Comment: v2: References added. v3: References added, published versio
Quasi-normal modes, area spectra and multi-horizon spacetimes

We suggest an interpretation for the highly damped QNM frequencies of the
spherically symmetric multi-horizon spacetimes (Reissner-Nordstrom,
Schwarzschild-deSitter, Reissner-Nordstrom-deSitter) following Maggiore's
proposal about the link between the asymptotic QNM frequencies and the black
hole thermodynamics. We show that the behavior of the asymptotic frequencies is
easy to understand if one assumes that all of the horizons have the same
equispaced area spectra. The QNM analysis is then consistent with the choice of
the area spectra to be the one originally proposed for the black hole's horizon
by Bekenstein: A=8\pi n (in Planck units). The interpretation of the highly
damped QNM frequencies in the multi-horizon case is based on the similar
grounds as in the single horizon (Schwarzschild) case, but it has some new
features that are discussed in the paper.Comment: 8 pages, v2: no physics changed, some references added, few sentences
  added in the discussion part
Integrand reduction of one-loop scattering amplitudes through Laurent
  series expansion

We present a semi-analytic method for the integrand reduction of one-loop
amplitudes, based on the systematic application of the Laurent expansions to
the integrand-decomposition. In the asymptotic limit, the coefficients of the
master integrals are the solutions of a diagonal system of equations, properly
corrected by counterterms whose parametric form is konwn a priori. The Laurent
expansion of the integrand is implemented through polynomial division. The
extension of the integrand-reduction to the case of numerators with rank larger
than the number of propagators is discussed as well.Comment: v2: Published version: references and two appendices added. v3:
  Eq.(6.11) corrected, Appendix B updated accordingl
Hawking radiation, chirality, and the principle of effective theory of
  gravity

In this paper we combine the chirality of field theories in near horizon
regions with the principle of effective theory of gravity to define a new
energy-momentum tensor for the theory. This new energy-momentum tensor has the
correct radiation flux to account for Hawking radiation for space-times with
horizons. This method is connected to the chiral anomaly cancellation method,
but it works for space-times for which the chiral anomaly cancellation method
fails. In particular the method presented here works for the non-asymptotically
flat de Sitter space-time and its associated Hawking-Gibbons radiation, as well
as Rindler space-time and its associated Unruh radiation. This indicates that
it is the chiral nature of the field theory in the near horizon regions which
is of primary importance rather than the chiral anomaly.Comment: 13 pages, LaTeX, no figures, to appear in JHEP; v2: two references
  added and various cosmetic (but no physics) changes to match published
  versio
Bounds on the Fermion-Bulk Masses in Models with Universal Extra
  Dimensions

In models with extra dimensions, vectorlike Dirac masses for fermion fields
are generically allowed. These masses are independent of electroweak symmetry
breaking and do not contribute to the known masses for the quarks and leptons.
They control the profile of the bulk wave functions, the mass spectra of
Kaluza-Klein modes, and interactions that could be tested in experiments. In
this article, we study the effects of bulk masses in electroweak precision
measurements and in dark matter and collider searches, to set bounds on the
bulk mass parameters in models with a flat universal extra dimension, namely,
Split-UED. We find the current bound on the universal bulk-mass to be smaller
than (0.2-0.3)/R, where R is the radius of the extra dimension. Similar but
slightly relaxed bounds are obtained in the non-universal bulk mass case. The
LHC is expected to play an important role in constraining the remaining
parameter space.Comment: 25 pages, 16 figure
Conformal higher-order viscoelastic fluid mechanics

We present a generally covariant formulation of conformal higher-order viscoelastic fluid mechanics with strain allowed to take arbitrarily large values. We give a general prescription to determine the dynamics of a relativistic viscoelastic fluid in a way consistent with the hypothesis of local thermodynamic equilibrium and the second law of thermodynamics. We then elaborately study the transient time scales at which the strain almost relaxes and becomes proportional to the gradients of velocity. We particularly show that a conformal second-order fluid with all possible parameters in the constitutive equations can be obtained without breaking the hypothesis of local thermodynamic equilibrium, if the conformal fluid is defined as the long time limit of a conformal second-order viscoelastic system. We also discuss how local thermodynamic equilibrium could be understood in the context of the fluid/gravity correspondence