pinecone/core-2020-05-10-deduplication huggingface dataset:
Large D holography with metric deformations.

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
Long-lived stau, sneutrino dark matter and right-slepton spectrum.

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%
Differential branching fraction and angular analysis of $\Lambda^{0}_{b}
  \rightarrow \Lambda \mu^+\mu^-$ decays

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
Search for a dimuon resonance in the ϒ mass region

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 Z$\gamma$ resonances using leptonic and hadronic final states
  in proton-proton collisions at $\sqrt{s}=$ 13 TeV

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
Bootstrapping the Spectral Function: On the Uniqueness of Liouville and
  the Universality of BTZ

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
New physics solutions for $R_D$ and $R_{D^*}$

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
The influence of D-branes' backreaction upon gravitational interactions
  between open strings

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
Classification of BPS Objects in N = 6 Chern-Simons Matter Theory

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
A Matrix Model for Baryons and Nuclear Forces

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
Direct Integration and Non-Perturbative Effects in Matrix Models

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
Holographic chiral magnetic spiral

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
The Many Phases of Holographic Superfluids

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
Amplitudes of 3D and 6D Maximal Superconformal Theories in Supertwistor
  Space

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
Exact vortex solutions in a CP^N Skyrme-Faddeev type model

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
Higgs-mediated FCNCs: Natural Flavour Conservation vs. Minimal Flavour
  Violation

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
Ultraviolet asymptotics of scalar and pseudoscalar correlators in hot
  Yang-Mills theory

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
One-Dimensional Approximation of Viscous Flows

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
The Relativistic Avatars of Giant Magnons and their S-Matrix

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
Nonperturbative Tests of Three-Dimensional Dualities

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
Fluctuations, Saturation, and Diffractive Excitation in High Energy
  Collisions

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
Charged, conformal non-relativistic hydrodynamics

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
Massive Three-Dimensional Supergravity From R+R^2 Action in Six
  Dimensions

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