pinecone/core-2020-05-10-deduplication huggingface dataset:
Higgs-regularized three-loop four-gluon amplitude in N=4 SYM:
  exponentiation and Regge limits

We compute the three-loop contribution to the N=4 supersymmetric Yang-Mills
planar four-gluon amplitude using the recently-proposed Higgs IR regulator of
Alday, Henn, Plefka, and Schuster. In particular, we test the proposed
exponential ansatz for the four-gluon amplitude that is the analog of the BDS
ansatz in dimensional regularization. By evaluating our results at a number of
kinematic points, and also in several kinematic limits, we establish the
validity of this ansatz at the three-loop level.
  We also examine the Regge limit of the planar four-gluon amplitude using
several different IR regulators: dimensional regularization, Higgs
regularization, and a cutoff regularization. In the latter two schemes, it is
shown that the leading logarithmic (LL) behavior of the amplitudes, and
therefore the lowest-order approximation to the gluon Regge trajectory, can be
correctly obtained from the ladder approximation of the sum of diagrams. In
dimensional regularization, on the other hand, there is no single dominant set
of diagrams in the LL approximation. We also compute the NLL and NNLL behavior
of the L-loop ladder diagram using Higgs regularization.Comment: 45 pages, 9 figures; v3: major revision (more stringent tests,
  discussion of order of limits in the Regge regime
A Warped Model of Dark Matter

We present a model of dark matter in a warped extra dimension in which the
dark sector mass scales are naturally generated without supersymmetry. The dark
force, responsible for dark matter annihilating predominantly into leptons, is
mediated by dark photons that naturally obtain a mass in the GeV range via a
dilaton coupling. As well as solving the gauge hierarchy problem, our model
predicts dark matter in the TeV range, including naturally tiny mass splittings
between pseudo-Dirac states. By the AdS/CFT correspondence both the dark photon
and dark matter are interpreted as composite states of the strongly-coupled
dual 4d theory. Thus, in our model the dark sector emerges at the TeV scale
from the dynamics of a new strong force.Comment: 26 pages, 2 figures; v2: references adde
Nekrasov Functions and Exact Bohr-Sommerfeld Integrals

In the case of SU(2), associated by the AGT relation to the 2d Liouville
theory, the Seiberg-Witten prepotential is constructed from the Bohr-Sommerfeld
periods of 1d sine-Gordon model. If the same construction is literally applied
to monodromies of exact wave functions, the prepotential turns into the
one-parametric Nekrasov prepotential F(a,\epsilon_1) with the other epsilon
parameter vanishing, \epsilon_2=0, and \epsilon_1 playing the role of the
Planck constant in the sine-Gordon Shroedinger equation, \hbar=\epsilon_1. This
seems to be in accordance with the recent claim in arXiv:0908.4052 and poses a
problem of describing the full Nekrasov function as a seemingly straightforward
double-parametric quantization of sine-Gordon model. This also provides a new
link between the Liouville and sine-Gordon theories.Comment: 10 page
Non-standard interactions versus non-unitary lepton flavor mixing at a
  neutrino factory

The impact of heavy mediators on neutrino oscillations is typically described
by non-standard four-fermion interactions (NSIs) or non-unitarity (NU). We
focus on leptonic dimension-six effective operators which do not produce
charged lepton flavor violation. These operators lead to particular
correlations among neutrino production, propagation, and detection non-standard
effects. We point out that these NSIs and NU phenomenologically lead, in fact,
to very similar effects for a neutrino factory, for completely different
fundamental reasons. We discuss how the parameters and probabilities are
related in this case, and compare the sensitivities. We demonstrate that the
NSIs and NU can, in principle, be distinguished for large enough effects at the
example of non-standard effects in the $\mu$-$\tau$-sector, which basically
corresponds to differentiating between scalars and fermions as heavy mediators
as leading order effect. However, we find that a near detector at superbeams
could provide very synergistic information, since the correlation between
source and matter NSIs is broken for hadronic neutrino production, while NU is
a fundamental effect present at any experiment.Comment: 32 pages, 5 figures. Final version published in JHEP. v3: Typo in Eq.
  (27) correcte
Partonic description of a supersymmetric p-brane

We consider supersymmetric extensions of a recently proposed partonic
description of a bosonic p-brane which reformulates the Nambu-Goto action as an
interacting multi-particle action with Filippov-Lie algebra gauge symmetry. We
construct a worldline supersymmetric action by postulating, among others, a
p-form fermion. Demanding a local worldline supersymmetry rather than the full
worldvolume supersymmetry, we circumvent a known no-go theorem against the
construction of a Ramond-Neveu-Schwarz supersymmetric action for a p-brane of
p>1. We also derive a spacetime supersymmetric Green-Schwarz extension from the
preexisting kappa-symmetric action.Comment: 1+16 pages, no figure; References added and Concluding section
  expanded. Final version to appear in JHE
Generating MHV super-vertices in light-cone gauge

We constructe the $\mathcal{N}=1$ SYM lagrangian in light-cone gauge using
chiral superfields instead of the standard vector superfield approach and
derive the MHV lagrangian. The canonical transformations of the gauge field and
gaugino fields are summarised by the transformation condition of chiral
superfields. We show that $\mathcal{N}=1$ MHV super-vertices can be described
by a formula similar to that of the $\mathcal{N}=4$ MHV super-amplitude. In the
discussions we briefly remark on how to derive Nair's formula for
$\mathcal{N}=4$ SYM theory directly from light-cone lagrangian.Comment: 25 pages, 7 figures, JHEP3 style; v2: references added, some typos
  corrected; Clarification on the condition used to remove one Grassmann
  variabl
Stability of Asymptotically Schroedinger RN Black Hole and
  Superconductivity

We perform a perturbative (near-critical) analysis of the stability of an
asymptotically Schroedinger Reissner-Nordstrom black hole with respect to
generation of charged scalar hair. We find that apart from the expected
instability at low temperatures typical of holographic models of
superconductivity, in the presence of certain operators a similar instability
appears as well at high temperatures. We propose that the reason for such a
phase diagram could be due to peculiar features of the dual gauge theory or the
failure of the model to provide a consistent holographic dual of a
non-relativistic superconductor.Comment: 18 pages, 6 figure
A proposal for B-physics on current lattices

A method to extract B-physics parameters (b-quark mass and fB, fBs decay constants) from currently available lattice data is presented and tested. The approach is based on the idea of constructing appropriate ratios of heavy-light meson masses and decay constants, respectively, possessing a precisely known static limit, and evaluating them at various pairs of heavy quark masses around the charm. Via a smooth interpolation in the heavy quark mass from the easily accessible charm region to the asymptotic point, B-physics parameters are computed with a few percent (statistical + systematic) error using recently produced Nf=2 maximally twisted Wilson fermions data
Virtual Compton Scattering off a Spinless Target in AdS/QCD

We study the doubly virtual Compton scattering off a spinless target
$\gamma^*P\to\gamma^*P'$ within the Anti-de Sitter(AdS)/QCD formalism. We find
that the general structure allowed by the Lorentz invariance and gauge
invariance of the Compton amplitude is not easily reproduced with the standard
recipes of the AdS/QCD correspondence. In the soft-photon regime, where the
semi-classical approximation is supposed to apply best, we show that the
measurements of the electric and magnetic polarizabilities of a target like the
charged pion in real Compton scattering, can already serve as stringent tests.Comment: 21 pages, version to be published in JHEP
A Profile Likelihood Analysis of the Constrained MSSM with Genetic
  Algorithms

The Constrained Minimal Supersymmetric Standard Model (CMSSM) is one of the
simplest and most widely-studied supersymmetric extensions to the standard
model of particle physics. Nevertheless, current data do not sufficiently
constrain the model parameters in a way completely independent of priors,
statistical measures and scanning techniques. We present a new technique for
scanning supersymmetric parameter spaces, optimised for frequentist profile
likelihood analyses and based on Genetic Algorithms. We apply this technique to
the CMSSM, taking into account existing collider and cosmological data in our
global fit. We compare our method to the MultiNest algorithm, an efficient
Bayesian technique, paying particular attention to the best-fit points and
implications for particle masses at the LHC and dark matter searches. Our
global best-fit point lies in the focus point region. We find many
high-likelihood points in both the stau co-annihilation and focus point
regions, including a previously neglected section of the co-annihilation region
at large m_0. We show that there are many high-likelihood points in the CMSSM
parameter space commonly missed by existing scanning techniques, especially at
high masses. This has a significant influence on the derived confidence regions
for parameters and observables, and can dramatically change the entire
statistical inference of such scans.Comment: 47 pages, 8 figures; Fig. 8, Table 7 and more discussions added to
  Sec. 3.4.2 in response to referee's comments; accepted for publication in
  JHE
The INTEGRAL/SPI 511 keV Signal from Hidden Valleys in Type Ia and Core
  Collapse Supernova Explosions

We examine under what circumstances the INTEGRAL/SPI 511 keV signal can
originate from decays of MeV-scale composite states produced by: (A)
thermonuclear (type Ia) or (B) core collapse supernovae (SNe). The requisite
dynamical properties that would account for the observed data are quite
distinct, for cases (A) and (B). We determine these requirements in simple
hidden valley models, where the escape fraction problem is naturally addressed,
due to the long lifetime of the new composite states. A novel feature of
scenario (A) is that the dynamics of type Ia SNe, standard candles for
cosmological measurements, might be affected by our mechanism. In case (A), the
mass of the state mediating between the hidden sector and the SM $\ee$ could be
a few hundred GeV and within the reach of a 500 GeV $\ee$ linear collider. We
also note that kinetic mixing of the photon with a light vector state may
provide an interesting alternate mediation mechanism in this case. Scenarios
based on case (B) are challenged by the need for a mechanism to transport some
of the produced positrons toward the Galactic bulge, due to the inferred
distribution of core collapse sources. The mass of the mediator in case (B) is
typically hundreds of TeV, leading to long-lived particles that could, under
certain circumstances, include a viable dark matter candidate. The appearance
of long-lived particles in typical models leads to cosmological constraints and
we address how a consistent cosmic history may be achieved.Comment: 19 pages. Version accepted for publication in JHEP
One-Loop Corrections to Type IIA String Theory in AdS4 x CP3

We study various methods for computing the one-loop correction to the energy
of classical solutions to type IIA string theory in AdS4 x CP3. This involves
computing the spectrum of fluctuations and then adding up the fluctuation
frequencies. We focus on two classical solutions with support in CP3: a
rotating point-particle and a circular spinning string with two angular momenta
equal to J. For each of these solutions, we compute the spectrum of
fluctuations using two techniques, known as the algebraic curve approach and
the world-sheet approach. If we use the same prescription for adding
fluctuation frequencies that was used for type IIB string theory in AdS5 x S5,
then we find that the world-sheet spectrum gives convergent one-loop
corrections but the algebraic curve spectrum gives divergent ones. On the other
hand, we find a new summation prescription which gives finite results when
applied to both the algebraic curve and world-sheet spectra. Naively, this
gives three predictions for the one-loop correction to the spinning string
energy (one from the algebraic curve and two from the world-sheet), however we
find that in the large-j limit (where j=J/sqrt(2pi^2 lambda)), the j^(-2n)
terms in all three cases agree. We therefore obtain a unique prediction for the
one-loop correction to the spinning string energy.Comment: 58 pages, 3 figures; v3: minor changes and references added,
  published in JHE
Minimal surfaces in AdS space and Integrable systems

We consider the Pohlmeyer reduction for spacelike minimal area worldsheets in
AdS$_5$. The Lax pair for the reduced theory is found, and written entirely in
terms of the $A_3=D_3$ root system, generalizing the $B_2$ affine Toda system
which appears for the AdS$_4$ string. For the $B_2$ affine Toda system, we show
that the area of the worlsheet is obtainable from the moduli space K\"ahler
potential of a related Hitchin system. We also explore the Saveliev-Leznov
construction for solutions of the $B_2$ affine Toda system, and recover the
rotationally symmetric solution associated to Painleve transcendent.Comment: 30 pages, JHEP style; v2, minor changes; v3, minor changes, version
  published in JHEP
On the characterisation of the underlying event

The measurement of the underlying event (UE) and its separation from hard
interactions in hadron-collider events is a conceptually and practically
challenging task. We develop a simple, mostly analytical toy model for the UE
in order to understand how different UE measurement approaches fare on the
practical aspects of this problem, comparing the traditional approach used so
far at Tevatron with a recently proposed "jet-area/median" approach. Both are
found to perform comparably well in measuring average properties of the UE,
such as the mean transverse momentum flow, but the jet-area/median approach has
distinct advantages in determining its fluctuations. We then use the
jet-area/median method to investigate a range of UE properties in existing
Monte Carlo event-generator tunes, validating the main results of the toy-model
and highlighting so-far unmeasured characteristics of the UE such as its
rapidity dependence, as well as its intra- and inter-event fluctuations and
correlations.Comment: v1: 40 pages, 17 figures; v2: small textual changes, version accepted
  by JHE
Ten-Dimensional Super-Twistors and Super-Yang-Mills

Four-dimensional super-twistors provide a compact covariant description of
on-shell N=4 d=4 super-Yang-Mills. In this paper, ten-dimensional
super-twistors are introduced which similarly provide a compact covariant
description of on-shell d=10 super-Yang-Mills. The super-twistor variables are
Z=(lambda^alpha, mu_alpha, Gamma^m) where lambda^alpha and mu_alpha are
constrained bosonic d=10 spinors and Gamma^m is a constrained fermionic d=10
vector. The Penrose map relates the twistor superfield Phi(Z) with the d=10
super-Yang-Mills vertex operator lambda^alpha A_alpha(x,theta) which appears in
the pure spinor formalism of the superstring, and the cubic super-Yang-Mills
amplitude is proportional to the super-twistor integral \int dZ Phi_1 Phi_2
Phi_3.Comment: 14 pages harvmac, added short clarificatio
Magnetic conductivity and Chern-Simons Term in Holographic Hydrodynamics
  of Charged AdS Black Hole

We study the effects of the Chern-Simons term in the hydrodynamics of the
five-dimensional Reissner-Nordstrom-AdS background. We work out the decoupling
problem of the equations of motion and calculate the retarded Green functions
explicitly. We then find that the Chern-Simons term induces the magnetic
conductivity caused by the anomaly effect. It is increasing function of
temperature running from a non-zero value at zero temperature to the twice the
value at infinite temperature.Comment: 19 pages, 2 figures; v2 discussion on classification of perturbation
  fields based on helicity base, third order in dispersion relation and more
  discussion on magnetic conductivity are added, some typos are corrected and
  references are added; v3 published versio
The Two Roads to "Intrinsic Charm" in B Decays

We describe two complementary ways to show the presence of higher order
effects in the 1/m_Q expansion for inclusive B decays that have been dubbed
"Intrinsic Charm". Apart from the lessons they can teach us about QCD's
nonperturbative dynamics their consideration is relevant for precise
extractions of |V_{cb}|: for they complement the estimate of the potential
impact of 1/m_Q^4 contributions. We draw semiquantitative conclusions for the
expected scale of Weak Annihilation in semileptonic B decays, both for its
valence and non-valence components.Comment: 17 pages, 3 figure
On the Numerical Evaluation of Loop Integrals With Mellin-Barnes
  Representations

An improved method is presented for the numerical evaluation of multi-loop
integrals in dimensional regularization. The technique is based on
Mellin-Barnes representations, which have been used earlier to develop
algorithms for the extraction of ultraviolet and infrared divergencies. The
coefficients of these singularities and the non-singular part can be integrated
numerically. However, the numerical integration often does not converge for
diagrams with massive propagators and physical branch cuts. In this work,
several steps are proposed which substantially improve the behavior of the
numerical integrals. The efficacy of the method is demonstrated by calculating
several two-loop examples, some of which have not been known before.Comment: 13 pp. LaTe
Shear Modes, Criticality and Extremal Black Holes

We consider a (2+1)-dimensional field theory, assumed to be holographically
dual to the extremal Reissner-Nordstrom AdS(4) black hole background, and
calculate the retarded correlators of charge (vector) current and
energy-momentum (tensor) operators at finite momentum and frequency. We show
that, similar to what was observed previously for the correlators of scalar and
spinor operators, these correlators exhibit emergent scaling behavior at low
frequency. We numerically compute the electromagnetic and gravitational
quasinormal frequencies (in the shear channel) of the extremal
Reissner-Nordstrom AdS(4) black hole corresponding to the spectrum of poles in
the retarded correlators. The picture that emerges is quite simple: there is a
branch cut along the negative imaginary frequency axis, and a series of
isolated poles corresponding to damped excitations. All of these poles are
always in the lower half complex frequency plane, indicating stability. We show
that this analytic structure can be understood as the proper limit of finite
temperature results as T is taken to zero holding the chemical potential fixed.Comment: 28 pages, 7 figures, added reference
Full Lagrangian and Hamiltonian for quantum strings on AdS_4 x CP^3 in a
  near plane wave limit

We find the full interacting Lagrangian and Hamiltonian for quantum strings
in a near plane wave limit of AdS_4 x CP^3. The leading curvature corrections
give rise to cubic and quartic terms in the Lagrangian and Hamiltonian that we
compute in full. The Lagrangian is found as the type IIA Green-Schwarz
superstring in the light-cone gauge employing a superspace construction with 32
grassmann-odd coordinates. The light-cone gauge for the fermions is non-trivial
since it should commute with the supersymmetry condition. We provide a
prescription to properly fix the kappa-symmetry gauge condition to make it
consistent with light-cone gauge. We use fermionic field redefinitions to find
a simpler Lagrangian. To construct the Hamiltonian a Dirac procedure is needed
in order to properly keep into account the fermionic second class constraints.
We combine the field redefinition with a shift of the fermionic phase space
variables that reduces Dirac brackets to Poisson brackets. This results in a
completely well-defined and explicit expression for the full interacting
Hamiltonian up to and including terms quartic in the number of fields.Comment: 40 pages. v2: Typos fixed, Refs. adde
New families of interpolating type IIB backgrounds

We construct new families of interpolating two-parameter solutions of type
IIB supergravity. These correspond to D3-D5 systems on non-compact
six-dimensional manifolds which are T^2 fibrations over Eguchi-Hanson and
multi-center Taub-NUT spaces, respectively. One end of the interpolation
corresponds to a solution with only D5 branes and vanishing NS three-form flux.
A topology changing transition occurs at the other end, where the internal
space becomes a direct product of the four-dimensional surface and the
two-torus and the complexified NS-RR three-form flux becomes imaginary
self-dual. Depending on the choice of the connections on the torus fibre, the
interpolating family has either N=2 or N=1 supersymmetry. In the N=2 case it
can be shown that the solutions are regular.Comment: 20 page
Collider Phenomenology with Split-UED

We investigate the collider implications of Split Universal Extra Dimensions.
The non-vanishing fermion mass in the bulk, which is consistent with the
KK-parity, largely modifies the phenomenology of Minimal Universal Exta
Dimensions. We scrutinize the behavior of couplings and study the discovery
reach of the Tevatron and the LHC for level-2 Kaluza-Klein modes in the
dilepton channel, which would indicates the presence of the extra dimensions.
Observation of large event rates for dilepton resonances can result from a
nontrivial fermion mass profile along the extra dimensions, which, in turn, may
corroborate extra dimensional explanation for the observation of the positron
excess in cosmic rays.Comment: 23 pages, 15 figure
Black Holes in Gravity with Conformal Anomaly and Logarithmic Term in
  Black Hole Entropy

We present a class of exact analytic and static, spherically symmetric black
hole solutions in the semi-classical Einstein equations with Weyl anomaly. The
solutions have two branches, one is asymptotically flat and the other
asymptotically de Sitter. We study thermodynamic properties of the black hole
solutions and find that there exists a logarithmic correction to the well-known
Bekenstein-Hawking area entropy. The logarithmic term might come from non-local
terms in the effective action of gravity theories. The appearance of the
logarithmic term in the gravity side is quite important in the sense that with
this term one is able to compare black hole entropy up to the subleading order,
in the gravity side and in the microscopic statistical interpretation side.Comment: Revtex, 10 pages. v2: minor changes and to appear in JHE
Semileptonic decays of the standard Higgs boson

The Higgs boson decay into a pair of real or virtual W bosons, with one of
them decaying leptonically, is predicted within the Standard Model to have the
largest branching fraction of all Higgs decays that involve an isolated
electron or muon, for M_h > 120 GeV. We compute analytically the
fully-differential width for this h -> l \nu jj decay at tree level, and then
explore some multi-dimensional cuts that preserve the region of large signal.
Future searches for semileptonic decays at the Tevatron and LHC, employing
fully-differential information as outlined here, may be essential for ruling
out or in the Higgs boson and for characterizing a Higgs signal.Comment: 17 pages, 5 .eps figure