pinecone/core-2020-05-10-deduplication huggingface dataset:
Effective potential and warp factor dynamics

We define an effective potential describing all massless and massive modes in
the supergravity limit of string/M theory compactification which is valid
off-shell, i.e. without imposing the equations of motion. If we neglect the
warp factor, it is unbounded below, as is the case for the action in Euclidean
quantum gravity. By study of the constraint which determines the warp factor,
we solve this problem, obtaining a physically satisfying and tractable
description of the dynamics of the warp factor.Comment: 32 pages, JHEP3.cls. v4: added reference to hep-th/050715
Nuclear matter to strange matter transition in holographic QCD

We construct a simple holographic QCD model to study nuclear matter to
strange matter transition. The interaction of dense medium and hadrons is taken
care of by imposing the force balancing condition for stable D4/D6/D6
configuration. By considering the intermediate and light flavor branes
interacting with baryon vertex homogeneously distributed along R^3 space and
requesting the energy minimization, we find that there is a well defined
transition density as a function of current quark mass. We also find that as
density goes up very high, intermediate (or heavy) and light quarks populate
equally as expected from the Pauli principle. In this sense, the effect of the
Pauli principle is realized as dynamics of D-branes.Comment: 13 pages, 14 figure
A Finely-Predicted Higgs Boson Mass from A Finely-Tuned Weak Scale

If supersymmetry is broken directly to the Standard Model at energies not
very far from the unified scale, the Higgs boson mass lies in the range 128-141
GeV. The end points of this range are tightly determined. Theories with the
Higgs boson dominantly in a single supermultiplet predict a mass at the upper
edge, (141 \pm 2) GeV, with the uncertainty dominated by the experimental
errors on the top quark mass and the QCD coupling. This edge prediction is
remarkably insensitive to the supersymmetry breaking scale and to
supersymmetric threshold corrections so that, in a wide class of theories, the
theoretical uncertainties are at the level of \pm 0.4 GeV. A reduction in the
uncertainties from the top quark mass and QCD coupling to the level of \pm 0.3
GeV may be possible at future colliders, increasing the accuracy of the
confrontation with theory from 1.4% to 0.4%. Verification of this prediction
would provide strong evidence for supersymmetry, broken at a very high scale of
~ 10^{14 \pm 2} GeV, and also for a Higgs boson that is elementary up to this
high scale, implying fine-tuning of the Higgs mass parameter by ~ 20-28 orders
of magnitude. Currently, the only known explanation for such fine-tuning is the
multiverse.Comment: 30 pages, 6 figures; typos correcte
Classical and Quantum SUSY Breaking Effects in IIB Local Models

We discuss the calculation of soft supersymmetry breaking terms in type IIB
string theoretic models in the Large Volume Scenario (LVS). The suppression of
FCNC gives a lower bound on the size of the compactification volume. This leads
to soft terms which are strongly suppressed relative to the gravitino mass so
that the dominant contribution to the gaugino masses comes from the Weyl
anomaly. The other soft terms are essentially generated by the renormalization
group running from the string scale to the TeV scale.Comment: Added comments and reference. Typos corrected. Version to be
  published in JHEP. 16 page
Flavor in Supersymmetry: Anarchy versus Structure

Future high-precision flavor experiments may discover a pattern of deviations
from the standard model predictions for flavor-changing neutral current
processes. One of the interesting questions that can be answered then will be
whether the flavor structure of the new physics is related to that of the
standard model or not. We analyze this aspect of flavor physics within a
specific framework: supersymmetric models where the soft breaking terms are
dominated by gauge-mediation but get non-negligible contributions from
gravity-mediation. We compare the possible patterns of non-minimally
flavor-violating effects that arise if the gravity-mediated contributions are
anarchical vs. the case that they are structured by a Froggatt-Nielsen
symmetry. We show that combining information on flavor and CP violation from
meson mixing and electric dipole moments is indicative for the flavor structure
of gravity-mediation.Comment: 27 pages, 2 figures. v2: Introduction extended, reference adde
Freeze-In Production of FIMP Dark Matter

We propose an alternate, calculable mechanism of dark matter genesis,
"thermal freeze-in," involving a Feebly Interacting Massive Particle (FIMP)
interacting so feebly with the thermal bath that it never attains thermal
equilibrium. As with the conventional "thermal freeze-out" production
mechanism, the relic abundance reflects a combination of initial thermal
distributions together with particle masses and couplings that can be measured
in the laboratory or astrophysically. The freeze-in yield is IR dominated by
low temperatures near the FIMP mass and is independent of unknown UV physics,
such as the reheat temperature after inflation. Moduli and modulinos of string
theory compactifications that receive mass from weak-scale supersymmetry
breaking provide implementations of the freeze-in mechanism, as do models that
employ Dirac neutrino masses or GUT-scale-suppressed interactions. Experimental
signals of freeze-in and FIMPs can be spectacular, including the production of
new metastable coloured or charged particles at the LHC as well as the
alteration of big bang nucleosynthesis.Comment: 30 pages, 7 figures, PDFLaTex. References adde
New Physics Signals in Longitudinal Gauge Boson Scattering at the LHC

We introduce a novel technique designed to look for signatures of new physics
in vector boson fusion processes at the TeV scale. This functions by measuring
the polarization of the vector bosons to determine the relative longitudinal to
transverse production. In studying this ratio we can directly probe the high
energy E^2-growth of longitudinal vector boson scattering amplitudes
characteristic of models with non-Standard Model (SM) interactions. We will
focus on studying models parameterized by an effective Lagrangian that include
a light Higgs with non-SM couplings arising from TeV scale new physics
associated with the electroweak symmetry breaking, although our technique can
be used in more general scenarios. We will show that this technique is stable
against the large uncertainties that can result from variations in the
factorization scale, improving upon previous studies that measure cross section
alone
Vacuum Alignment in SUSY A4 Models

In this note we discuss the vacuum alignment in supersymmetric models with
spontaneously broken flavour symmetries in the presence of soft supersymmetry
(SUSY) breaking terms. We show that the inclusion of soft SUSY breaking terms
can give rise to non-vanishing vacuum expectation values (VEVs) for the
auxiliary components of the flavon fields. These non-zero VEVs can have an
important impact on the phenomenology of this class of models, since they can
induce an additional flavour violating contribution to the sfermion soft mass
matrix of right-left (RL) type. We carry out an explicit computation in a class
of SUSY A4 models predicting tri-bimaximal mixing in the lepton sector. The
flavour symmetry breaking sector is described in terms of flavon and driving
supermultiplets. We find non-vanishing VEVs for the auxiliary components of the
flavon fields and for the scalar components of the driving fields which are of
order m_{SUSY} x <phi> and m_{SUSY}, respectively. Thereby, m_{SUSY} is the
generic soft SUSY breaking scale which is expected to be around 1 TeV and <phi>
is the VEV of scalar components of the flavon fields. Another effect of these
VEVs can be the generation of a mu term.Comment: 23 pages; added a new section on the relation to Supergravity;
  version accepted for publication in JHE
AdS_7/CFT_6, Gauss-Bonnet Gravity, and Viscosity Bound

We study the relation between the causality and the positivity of energy
bounds in Gauss-Bonnet gravity in AdS_7 background and find a precise
agreement. Requiring the group velocity of metastable states to be bounded by
the speed of light places a bound on the value of Gauss-Bonnet coupling. To
find the positivity of energy constraints we compute the parameters which
determine the angular distribution of the energy flux in terms of three
independent coefficients specifying the three-point function of the
stress-energy tensor. We then relate the latter to the Weyl anomaly of the
six-dimensional CFT and compute the anomaly holographically. The resulting
upper bound on the Gauss-Bonnet coupling coincides with that from causality and
results in a new bound on viscosity/entropy ratio.Comment: 21 page, harvmac; v2: reference adde
Neutron Electric Dipole Moment Constraint on Scale of Minimal Left-Right
  Symmetric Model

Using an effective theory approach, we calculate the neutron electric dipole
moment (nEDM) in the minimal left-right symmetric model with both explicit and
spontaneous CP violations. We integrate out heavy particles to obtain
flavor-neutral CP-violating effective Lagrangian. We run the Wilson
coefficients from the electroweak scale to the hadronic scale using one-loop
renormalization group equations. Using the state-of-the-art hadronic matrix
elements, we obtain the nEDM as a function of right-handed W-boson mass and
CP-violating parameters. We use the current limit on nEDM combined with the
kaon-decay parameter $\epsilon$ to provide the most stringent constraint yet on
the left-right symmetric scale $ M_{W_R} > (10 \pm 3) $ TeV.Comment: 20 pages and 8 figure
Enhanced Supersymmetry of Nonrelativistic ABJM Theory

We study the supersymmetry enhancement of nonrelativistic limits of the ABJM
theory for Chern-Simons level $k=1,2$. The special attention is paid to the
nonrelativistic limit (known as `PAAP' case) containing both particles and
antiparticles. Using supersymmetry transformations generated by the monopole
operators, we find additional 2 kinematical, 2 dynamical, and 2 conformal
supercharges for this case. Combining with the original 8 kinematical
supercharges, the total number of supercharges becomes maximal: 14
supercharges, like in the well-known PPPP limit. We obtain the corresponding
super Schr\"odinger algebra which appears to be isomorphic to the one of the
PPPP case. We also discuss the role of monopole operators in supersymmetry
enhancement and partial breaking of supersymmetry in nonrelativistic limit of
the ABJM theory.Comment: 22 pages, references added, version to appear in JHE
Emergent Quantum Near-Criticality from Baryonic Black Branes

We find new black 3-brane solutions describing the "conifold gauge theory" at
nonzero temperature and baryonic chemical potential. Of particular interest is
the low-temperature limit where we find a new kind of weakly curved
near-horizon geometry; it is a warped product AdS_2 x R^3 x T^{1,1} with warp
factors that are powers of the logarithm of the AdS radius. Thus, our solution
encodes a new type of emergent quantum near-criticality. We carry out some
stability checks for our solutions. We also set up a consistent ansatz for
baryonic black 2-branes of M-theory that are asymptotic to AdS_4 x Q^{1,1,1}.Comment: 29 pages, 4 figures; v2 discussion of entropy revised, minor changes;
  v3 note added, minor improvements, version published in JHE
On Uplifted SUSY-Breaking Vacua and Direct Mediation in Generalized SQCD

We search for viable models of direct gauge mediation, where the
SUSY-breaking sector is (generalized) SQCD, which has cosmologically favorable
uplifted vacua even when the reheating temperature is well above the messenger
scale. This requires a relatively large tadpole term in the scalar potential
for the spurion field X and, consequently, we argue that pure (deformed) SQCD
is not a viable model. On the other hand, in SQCD with an adjoint, which is
natural e.g. in string theory, assuming an appropriate sign in the Kahler
potential for X, such metastable vacua are possible.Comment: 26 pages, harvmac; V2: refs. added; V3: refs. added
Charged Magnetic Brane Solutions in AdS_5 and the fate of the third law
  of thermodynamics

We construct asymptotically AdS_5 solutions to 5-dimensional Einstein-Maxwell
theory with Chern-Simons term which are dual to 4-dimensional gauge theories,
including N=4 SYM theory, in the presence of a constant background magnetic
field B and a uniform electric charge density \rho. For the solutions
corresponding to supersymmetric gauge theories, we find numerically that a
small magnetic field causes a drastic decrease in the entropy at low
temperatures. The near-horizon AdS_2 \times R^3 geometry of the purely
electrically charged brane thus appears to be unstable under the addition of a
small magnetic field. Based on this observation, we propose a formulation of
the third law of thermodynamics (or Nernst theorem) that can be applied to
black holes in the AdS/CFT context.
  We also find interesting behavior for smaller, non-supersymmetric, values of
the Chern-Simons coupling k. For k=1 we exhibit exact solutions corresponding
to warped AdS_3 black holes, and show that these can be connected to
asymptotically AdS_5 spacetime. For k\leq 1 the entropy appears to go to a
finite value at extremality, but the solutions still exhibit a mild singularity
at strictly zero temperature. In addition to our numerics, we carry out a
complete perturbative analysis valid to order B^2, and find that this
corroborates our numerical results insofar as they overlap.Comment: 45 pages v2: added note about subsequent results found in
  arXiv:1003.130
Holography at an Extremal De Sitter Horizon

Rotating maximal black holes in four-dimensional de Sitter space, for which
the outer event horizon coincides with the cosmological horizon, have an
infinite near-horizon region described by the rotating Nariai metric. We show
that the asymptotic symmetry group at the spacelike future boundary of the
near-horizon region contains a Virasoro algebra with a real, positive central
charge. This is evidence that quantum gravity in a rotating Nariai background
is dual to a two-dimensional Euclidean conformal field theory. These results
are related to the Kerr/CFT correspondence for extremal black holes, but have
two key differences: one of the black hole event horizons has been traded for
the cosmological horizon, and the near-horizon geometry is a fiber over dS_2
rather than AdS_2.Comment: 15 page
On the transverse momentum in Z-boson production in a virtuality ordered
  parton shower

Cross sections for physical processes that involve very different momentum
scales in the same process will involve large logarithms of the ratio of the
momentum scales when calculated in perturbation theory. One goal of
calculations using parton showers is to sum these large logarithms. We ask
whether this goal is achieved for the transverse momentum distribution of a
Z-boson produced in hadron-hadron collisions when the shower is organized with
higher virtuality parton splittings coming first, followed successively by
lower virtuality parton splittings. We find that the virtuality ordered shower
works well in reproducing the known QCD result.Comment: 60 pages with three figure
An Analytic Result for the Two-Loop Hexagon Wilson Loop in N = 4 SYM

In the planar N=4 supersymmetric Yang-Mills theory, the conformal symmetry
constrains multi-loop n-edged Wilson loops to be basically given in terms of
the one-loop n-edged Wilson loop, augmented, for n greater than 6, by a
function of conformally invariant cross ratios. We identify a class of
kinematics for which the Wilson loop exhibits exact Regge factorisation and
which leave invariant the analytic form of the multi-loop n-edged Wilson loop.
In those kinematics, the analytic result for the Wilson loop is the same as in
general kinematics, although the computation is remarkably simplified with
respect to general kinematics. Using the simplest of those kinematics, we have
performed the first analytic computation of the two-loop six-edged Wilson loop
in general kinematics.Comment: 17 pages. Extended discussion on how the QMRK limit is taken. Version
  accepted by JHEP. A text file containing the Mathematica code with the
  analytic expression for the 6-point remainder function is include
Phase transitions between Reissner-Nordstrom and dilatonic black holes
  in 4D AdS spacetime

We study Einstein-Maxwell-dilaton gravity models in four-dimensional anti-de
Sitter (AdS) spacetime which admit the Reissner-Nordstrom (RN) black hole
solution. We show that below a critical temperature the AdS-RN solution becomes
unstable against scalar perturbations and the gravitational system undergoes a
phase transition. We show using numerical calculations that the new phase is a
charged dilatonic black hole. Using the AdS/CFT correspondence we discuss the
phase transition in the dual field theory both for non-vanishing temperatures
and in the extremal limit. The extremal solution has a Lifshitz scaling
symmetry. We discuss the optical conductivity in the new dual phase and find
interesting behavior at low frequencies where it shows a "Drude peak". The
resistivity varies with temperature in a non-monotonic way and displays a
minimum at low temperatures which is reminiscent of the celebrated Kondo
effect.Comment: 19 pages - v2: minor corrections and additional references -v3:
  Figs.5 changed and additional comments. Version accepted in JHE
Holographic electrical and thermal conductivity in strongly coupled
  gauge theory with multiple chemical potentials

We study transport coefficients of strongly coupled gauge theory in the
presence of multiple chemical potential which are dual to rotating D3, M2 and
M5 brane. Using the general form of the perturbation equations, we compute
DC-electrical conductivity at finite temperature as well as at zero
temperature. We also study thermal conductivity for the same class of black
holes and show that thermal conductivity and viscosity obeys Wiedemann-Franz
like law even in the presence of multiple chemical potential.Comment: 30 pages,No figures, typos corrected, section 8 rewritten, close to
  published versio
Ioffe times in DIS from a dipole model fit

We present a study of Ioffe times in deep inelastic electron-proton scattering. We deduce ‘experimental’ Ioffe-time distributions from the small- x HERA data as described by a particular colour-dipole-model fit. We show distributions for three representative γ* p c.m. energies W and various values of the photon virtuality Q 2. These distributions are rather broad for transversely and very narrow for longitudinally polarised virtual photons. The Ioffe times for W = 150 GeV, for example, range from around 103 fm for Q 2 = 1 GeV2 to around 10 fm for Q 2 = 100 GeV2. Based on our results we discuss consequences for the limitations of applicability of the dipole picture
Five-loop anomalous dimension at critical wrapping order in N=4 SYM

We compute the anomalous dimension of a length-five operator at five-loop
order in the SU(2) sector of N=4 SYM theory in the planar limit. This is
critical wrapping order at five loops. The result is obtained perturbatively by
means of N=1 superspace techniques. Our result from perturbation theory
confirms explicitly the formula conjectured in arXiv:0901.4864 for the
five-loop anomalous dimension of twist-three operators. We also explicitly
obtain the same result by employing the recently proposed Y-system.Comment: LaTeX, feynmp, 34 pages, 21 figures, 8 table
A No-Go Theorem for M5-brane Theory

The BLG model for multiple M2-branes motivates an M5-brane theory with a
novel gauge symmetry defined by the Nambu-Poisson structure. This Nambu-Poisson
gauge symmetry for an M5-brane in large C-field background can be matched, on
double dimension reduction, with the Poisson limit of the noncommutative gauge
symmetry for a D4-brane in B-field background. Naively, one expects that there
should exist a certain deformation of the Nambu-Poisson structure to match with
the full noncommutative gauge symmetry including higher order terms. However,
We prove the no-go theorem that there is no way to deform the Nambu-Poisson
gauge symmetry, even without assuming the existence of a deformation of
Nambu-Poisson bracket, to match with the noncommutative gauge symmetry in 4+1
dimensions to all order, regardless of how the double dimension reduction is
implemented.Comment: v4: minor modifications
On the Relation between Hybrid and Pure Spinor String Theory

In this paper we revisit Berkovits' pure spinor formalism in lower
dimensions. We are particularly interested in relating a six-dimensional pure
spinor action previously constructed in the literature to other superstring
formalisms. In order to gain some insight into six-dimensional pure spinors, we
first derive their action by gauge-fixing the classical six-dimensional
Green-Schwarz action. We then consider a hybrid pure spinor construction in
which the spacetime symmetries of six of the ten dimensions are described in
pure spinor variables, while the remaining four dimensions are parameterized in
terms of RNS variables. We relate this pure spinor formalism to the
Berkovits-Vafa-Witten hybrid formalism of string theory on R^6 x T^4.Comment: 15 pages, 1 figur
More On The Connection Between Planar Field Theory And String Theory

We continue work on the connection between world sheet representation of the
planar phi^3 theory and string formation. The present article, like the earlier
work, is based on the existence of a solitonic solution on the world sheet, and
on the zero mode fluctuations around this solution. The main advance made in
this paper is the removal of the cutoff and the transition to the continuum
limit on the world sheet. The result is an action for the modes whose energies
remain finite in this limit (light modes). The expansion of this action about a
dense background of graphs on the world sheet leads to the formation of a
string.Comment: 27 pages, 3 figure
Neutrino-Flavoured Sneutrino Dark Matter

A simple theory of supersymmetric dark matter (DM) naturally linked to
neutrino flavour physics is studied. The DM sector comprises a spectrum of
mixed lhd-rhd sneutrino states where both the sneutrino flavour structure and
mass splittings are determined by the associated neutrino masses and mixings.
Prospects for indirect detection from solar capture are good due to a large
sneutrino-nucleon cross-section afforded by the inelastic splitting (solar
capture limits exclude an explanation of DAMA/LIBRA). We find parameter regions
where all heavier states will have decayed, leaving only one flavour mixture of
sneutrino as the candidate DM. Such regions have a unique `smoking gun'
signature--sneutrino annihilation in the Sun produces a pair of neutrino mass
eigenstates free from vacuum oscillations, with the potential for detection at
neutrino telescopes through the observation of a hard spectrum of nu_mu and
nu_tau (for a normal neutrino hierarchy). Next generation direct detection
experiments can explore much of the parameter space through both elastic and
inelastic scattering. We show in detail that the observed neutrino masses and
mixings can arise as a consequence of supersymmetry breaking effects in the
sneutrino DM sector, consistent with all experimental constraints.Comment: 25 pages, 11 figure