pinecone/core-2020-05-10-deduplication huggingface dataset:
Second-order corrections to mean-field evolution of weakly interacting
  Bosons, II

We study the evolution of a N-body weakly interacting system of Bosons. Our
work forms an extension of our previous paper I, in which we derived a
second-order correction to a mean-field evolution law for coherent states in
the presence of small interaction potential. Here, we remove the assumption of
smallness of the interaction potential and prove global existence of solutions
to the equation for the second-order correction. This implies an improved
Fock-space estimate for our approximation of the N-body state
Modelling the Infrared continuum of Centaurus A

We present ISOPHOT_S, ISOSWS and 8 to 13 micron ground based observations of
Centaurus A that show prominent PAH and silicate features. These and other data
are used to construct a model for the infrared continuum. We find that in a
nuclear sized aperture (~4 arcsec, ~60 pc) the SED is characteristic of
emission from a starburst and AGN torus; in larger apertures an additional
component of cirrus emission is required. Based on our model, the torus
diameter is estimated to be 3.6 pc and the best fitting inclination angle of
the torus is 45 degrees. This result has implications for the detectability of
tori in low power AGN and in particular for the use of the IRAS 60/25 micron
flux ratio as an indicator of the torus inclination.Comment: 4 pages, 5 figures, published in the proceedings of ESA conference
  'The Universe as seen by ISO', eds. P. Cox & M. F. Kessler. (ESA Special
  Publications series SP-427). Latex style files included with submissio
Hydrodynamical simulations of the Sunyaev--Zel'dovich effect

We use a hydrodynamical N-body code to generate simulated maps, of size one
square degree, of the thermal SZ effect. We study three different cosmologies;
the currently-favoured low-density model with a cosmological constant, a
critical-density model and a low-density open model. We stack simulation boxes
corresponding to different redshifts in order to include contributions to the
Compton y-parameter out to the highest necessary redshifts. Our main results
are:
  1. The mean y-distortion is around $4 \times 10^{-6}$ for low-density
cosmologies, and $1 \times 10^{-6}$ for critical density. These are below
current limits, but not by a wide margin in the former case.
  2. In low-density cosmologies, the mean y-distortion comes from a broad range
of redshifts, the bulk coming from $z < 2$ and a tail out to $z \sim 5$. For
critical-density models, most of the contribution comes from $z < 1$.
  3. The number of SZ sources above a given $y$ depends strongly on instrument
resolution. For a one arcminute beam, there is around 0.1 sources per square
degree with $y > 10^{-5}$ in a critical-density Universe, and around 8 such
sources per square degree in low-density models. Low-density models with and
without a cosmological constant give very similar results.
  4. We estimate that the {\sc Planck} satellite will be able to see of order
25000 SZ sources if the Universe has a low density, or around 10000 if it has
critical density.Comment: 9 pages LaTeX file with eleven figures (including four in colour)
  incorporated (uses mn.sty and epsf). Further colour images and animations at
  http://star-www.cpes.susx.ac.uk/~andrewl/sz/sz.html Updated to match
  published versio
N=(1,1) Super Yang-Mills on a (2+1) Dimensional Transverse Lattice with
  one Exact Supersymmetry

We present a formulation of N=(1,1), Super Yang-Mills theory in 2+1
dimensions using a transverse lattice methods that exactly preserves one
supersymmetry. First, using a Lagrangian approach we obtain a standard
transverse lattice formulation of the Hamiltonian. We then show that the
Hamiltonian also can be written discretely as the square of a supercharge and
that this produces a different result. Problems associated with the discrete
realization of the full supercharge algebra are discussed. Numerically we solve
for the bound states of the theory in the large N_c approximation and we find
good convergence. We show that the number of fermion and boson massless bound
states are closely related. Also we find that this theory admits winding states
in the transverse direction and that their masses vary inversely with the
winding number.Comment: 16 pages, 6 figure
The q_T spectrum of the Higgs boson at the LHC in QCD perturbation
  theory

We consider the transverse-momentum (q_T) distribution of Higgs bosons
produced at hadron colliders. We use a formalism that uniformly treats both the
small-q_T and large-q_T regions in QCD perturbation theory. At small q_T (q_T
<< M_H, M_H being the mass of the Higgs boson), we implement an all-order
resummation of logarithmically-enhanced contributions up to
next-to-next-to-leading logarithmic accuracy. At large q_T (q_T \gtap M_H), we
use fixed-order perturbation theory up to next-to-leading order. The resummed
and fixed-order approaches are consistently matched by avoiding double-counting
in the intermediate-q_T region. In this region, the introduction of unjustified
higher-order terms is avoided by imposing unitarity constraints, so that the
integral of the q_T spectrum exactly reproduces the perturbative result for the
total cross section up to next-to-next-to-leading order. Numerical results at
the LHC are presented. These show that the main features of the q_T
distribution are quite stable with respect to perturbative QCD uncertainties.Comment: 9 pages, 2 postscript figure
WASP-64b and WASP-72b: two new transiting highly irradiated giant
  planets

We report the discovery by the WASP transit survey of two new highly
irradiated giant planets transiting moderately bright stars. WASP-64b is
slightly more massive (1.271+-0.068 M_Jup) and larger (1.271+-0.039 R_Jup) than
Jupiter, and is in very-short (a=0.02648+-0.00024 AU, P=1.5732918+-0.0000015
days) circular orbit around a V=12.3 G7-type dwarf (1.004+-0.028 M_Sun,
1.058+-0.025 R_Sun, Teff=5500+-150 K). Its size is typical of hot Jupiters with
similar masses. WASP-72b has also a mass a bit higher than Jupiter's
(1.461-0.056+0.059 M_Jup) and orbits very close (0.03708+-0.00050 AU,
P=2.2167421+-0.0000081 days) to a bright (V=9.6) and moderately evolved F7-type
star (1.386+-0.055 M_Sun, 1.98+-0.24 R_Sun, Teff=6250+-100 K). Despite its
extreme irradiation (about 5.5 10^9 erg/s/cm^2), WASP-72b has a moderate size
(1.27+-0.20 R_Jup) that could suggest a significant enrichment in heavy
elements. Nevertheless, the errors on its physical parameters are still too
high to draw any strong inference on its internal structure or its possible
peculiarity.Comment: Accepted for publication in Astronomy and Astrophysics. 12 pages, 13
  figures. Version 2 presents new photometric data an updated parameters for
  the WASP-72 syste
Room Temperature In-plane <100> Magnetic Easy Axis for
  Fe3O4/SrTiO3(001):Nb Grown by Infrared PLD

We examine the magnetic easy-axis directions of stoichiometric magnetite
films grown on SrTiO3:Nb by infrared pulsed-laser deposition. Spin-polarized
low-energy electron microscopy reveals that the individual magnetic domains are
magnetized along the in-plane <100> film directions. Magneto-optical Kerr
effect measurements show that the maxima of the remanence and coercivity are
also along in-plane <100> film directions. This easy-axis orientation differs
from bulk magnetite and films prepared by other techniques, establishing that
the magnetic anisotropy can be tuned by film growth.Comment: 3 pages, 3 figure
Baryon Stability on the Higgs Dissolution Edge : Threshold corrections
  and suppression of Baryon violation in the NMSGUT

Superheavy threshold corrections to the matching condition between matter
Yukawa couplings of the effective Minimal Supersymmetric Standard Model (MSSM)
and the New Minimal Supersymmetric (SO(10)) GUT(NMSGUT) provide a novel and
generic mechanism for reducing the long standing and generically problematic
operator dimension 5 Baryon decay rates. In suitable regions of the parameter
space strong wave function renormalization of the effective MSSM Higgs doublets
due to the large number of heavy fields can take the wave function
renormalization of the MSSM Higgs field close to the dissolution value
($Z_{H,\overline{H}}=0$). Rescaling to canonical kinetic terms lowers the
SO(10) Yukawas required to match the MSSM fermion data. Since the same Yukawas
determine the dimension 5 B violation operator coefficients, the associated
rates can be suppressed to levels compatible with current limits. Including
these threshold effects also relaxes the constraint $ y_b-y_\tau\simeq
y_s-y_\mu$ operative between $\textbf{10} -\textbf{120} $ plet generated tree
level MSSM matter fermion Yukawas $y_f$. We exhibit accurate fits of the MSSM
fermion mass-mixing data in terms of NMSGUT superpotential couplings and 5
independent soft Susy breaking parameters specified at $10^{16.25}\,$ GeV with
the claimed suppression of Baryon decay rates. As before, our s-spectra are of
the mini split supersymmetry type with large $|A_0|,\mu,m_{H,\overline H} >
100\,\,$ TeV, light gauginos and normal s-hierarchy. Large $A_0,\mu$ and soft
masses allow significant deviation from the canonical GUT gaugino mass ratios
and ensure vacuum safety. Even without optimization, prominent candidates for
BSM discovery such as the muon magnetic anomaly, $b\rightarrow s\gamma$ and
Lepto-genesis CP violation emerge in the preferred ball park.Comment: PdfLatex. 50 pages. Version accepted for publication in Nuclear
  Phys.B(2014). Available online at
  http://dx.doi.org/10.1016/j.nuclphysb.2014.03.003. arXiv admin note:
  substantial text overlap with arXiv:1107.296
Optimal boundary conditions at the staircase-shaped coastlines

A 4D-Var data assimilation technique is applied to the rectangular-box
configuration of the NEMO in order to identify the optimal parametrization of
boundary conditions at lateral boundaries. The case of the staircase-shaped
coastlines is studied by rotating the model grid around the center of the box.
It is shown that, in some cases, the formulation of the boundary conditions at
the exact boundary leads to appearance of exponentially growing modes while
optimal boundary conditions allow to correct the errors induced by the
staircase-like appriximation of the coastline.Comment: Submitted to Ocean Dynamics. (27/02/2014
The inside outs of AdS(3)/CFT(2): Exact AdS wormholes with entangled CFT
  duals

We present the complete family of solutions of 3D gravity (Lambda<0) with two
asymptotically AdS exterior regions. The solutions are constructed from data at
the two boundaries, which correspond to two independent and arbitrary stress
tensors T_R, \bar T_R, and T_L, \bar T_L. The two exteriors are smoothly joined
on to an interior region through a regular horizon. We find CFT duals of these
geometries which are entangled states of two CFT's. We compute correlators
between general operators at the two boundaries and find perfect agreement
between CFT and bulk calculations. We calculate and match the CFT entanglement
entropy (EE) with the holographic EE which involves geodesics passing through
the wormhole. We also compute a holographic, non-equilibrium entropy for the
CFT using properties of the regular horizon. The construction of the bulk
solutions here uses an exact version of Brown-Henneaux type diffeomorphisms
which are asymptotically nontrivial and transform the CFT states by two
independent unitary operators on the two sides. Our solutions provide an
infinite family of explicit examples of the ER=EPR relation of Maldacena and
Susskind [arXiv:1306.0533].Comment: 27 pages + 10 pages of Appendix and references; (v2) title changed
  for clarity, typos fixed, references adde
Holography and Entropy Bounds in Gauss-Bonnet Gravity

We discuss the holography and entropy bounds in Gauss-Bonnet gravity theory.
By applying a Geroch process to an arbitrary spherically symmetric black hole,
we show that the Bekenstein entropy bound always keeps its form as $S_{\rm
B}=2\pi E R$, independent of gravity theories. As a result, the
Bekenstein-Verlinde bound also remains unchanged. Along the Verlinde's
approach, we obtain the Bekenstein-Hawking bound and Hubble bound, which are
different from those in Einstein gravity. Furthermore, we note that when
$HR=1$, the three cosmological entropy bounds become identical as in the case
of Einstein gravity. But, the Friedmann equation in Gauss-Bonnet gravity can no
longer be cast to the form of cosmological Cardy formula.Comment: 8 pages, Late
The Effective Prepotential of N=2 Supersymmetric $SU(N_c)$ Gauge Theories

We determine the effective prepotential for N=2 supersymmetric SU(N_c) gauge theories with an arbitrary number of flavors N_f < 2N_c, from the exact solution constructed out of spectral curves. The prepotential is the same for the several models of spectral curves proposed in the literature. It has to all orders the logarithmic singularities of the one-loop perturbative corrections, thus confirming the non-renormalization theorems from supersymmetry. In particular, the renormalized order parameters and their duals have all the correct monodromy transformations prescribed at weak coupling. We evaluate explicitly the contributions of one- and two-instanton processes
On the number of instabilities of cosmological solutions in an
  Einstein-Yang-Mills system

A detailed numerical stability analysis of the static, spherically symmetric
globally regular solutions of the Einstein-Yang-Mills equations with a positive
cosmological constant, Lambda, is carried out. It is found that the number of
unstable modes in the even parity sector is n for solutions with n=1,2 nodes as
Lambda varies. The solution with n=3 nodes exhibits a rather surprising
behaviour in that the number of its unstable modes jumps from 3 to 1 as Lambda
crosses (from below) a critical value. In particular the topologically 3-sphere
type solution with n=3 nodes has only a single unstable mode.Comment: minor corrections,to appear in Physics Letters
Noncommutative Self-Dual Supersymmetric Yang-Mills Theory

We formulate noncommutative self-dual N=4 supersymmetric Yang-Mills theory in
D=2+2 dimensions. As in the corresponding commutative case, this theory can
serve as the possible master theory of all the noncommutative supersymmetric
integrable models in lower dimensions. As a by-product, noncommutative
self-dual N=2 supersymmetric Yang-Mills theory is obtained in D=2+2. We also
perform a dimensional reduction of the N=2 theory further into N=(2,2) in
D=1+1, as a basis for more general future applications. As a typical example,
we show how noncommutative integrable matrix N=(1,0) supersymmetric KdV
equations in D=1+1 arise from this theory, via the Yang-Mills gauge groups
GL(n, R) or SL(2n, R).Comment: 14 pages, no figures, minor changes with two couples of references
  added and delete
On the Energy-Momentum Tensor of the Scalar Field in Scalar-Tensor Theories of Gravity

We study the dynamical description of gravity, the appropriate definition of the scalar field energy-momentum tensor, and the interrelation between them in scalar-tensor theories of gravity. We show that the quantity which one would naively identify as the energy-momentum tensor of the scalar field is not appropriate because it is spoiled by a part of the dynamical description of gravity. A new connection can be defined in terms of which the full dynamical description of gravity is explicit, and the correct scalar field energy-momentum tensor can be immediately identified. Certain inequalities must be imposed on the two free functions (the coupling function and the potential) that define a particular scalar-tensor theory, to ensure that the scalar field energy density never becomes negative. The correct dynamical description leads naturally to the Einstein frame formulation of scalar-tensor gravity which is also studied in detail
Search for Higgs Bosons and Other Massive States decaying into two Photons in $e^{+}e^{-}$ Collisions at 189 GeV

A search is described for the generic process e+e- to X Y, where X is a neutral heavy scalar boson decaying into a pair of photons, and Y is a neutral heavy boson (scalar or vector) decaying into a fermion pair. The search is motivated mainly by the cases where either X, or both X and Y, are Higgs bosons. In particular, we investigate the case where X is the Standard Model Higgs boson and Y the Z0 boson. Other models with enhanced Higgs boson decay couplings to photon pairs are also considered. The present search combines the data set collected by the OPAL collaboration at 189 GeV collider energy, having an integrated luminosity of 182.6pb-1, with data samples collected at lower energies. The search results have been used to put 95% confidence level bounds, as functions of the mass of X, on the product of the cross-section and the relevant branching ratios, both in a model independent manner and for the particular models considered
Gravitational domain walls and p-brane distributions

We review the main algebraic aspects that characterize and determine the domain wall solutions of maximal gauged supergravity in various spacetime dimensions by considering consistent truncations that retain a number of components in the diagonal of the coset space scalar manifold of the theory. Starting from the algebraic classification of domain walls in D=4 gauged supergravity, we also derive the corresponding solutions in D=5 and D=7 dimensions. From a higher dimensional point of view, these solutions describe the gravitatonal field, in the field theory limit, of a large number of M2-, D3- and M5-branes that are distributed on hypersurfaces in the transverse space to the branes. As a new result we employ a smearing procedure as well as various dualities to list the irreducible curves and the symmetry groups of p-brane distributions for all values of p that are of interest in current applications of string theory. Some emphasis is placed on the presentation of new results in the case of NS5-branes
Numerical estimation of entropy loss on dimerization: improved prediction of the quaternary structure of the GCN4 leucine zipper

A lattice based model of a protein is used to study the dimerization equilibrium of the GCN4 leucine zipper. Replica exchange Monte Carlo is used to determine the free energy of both the monomeric and dimeric forms as a function of temperature. The method of coincidences is then introduced to explicitly calculate the entropy loss associated with dimerization, and from it the free energy difference between monomer and dimer, as well as the corresponding equilibrium reaction constant. We find that the entropy loss of dimerization is a strong function of energy (or temperature), and that it is much larger than previously estimated, especially for high energy states. The results confirm that it is possible to study the dimerization equilibrium of GCN4 at physiological concentrations within the reduced representation of the protein employed
Chiral Symmetry restoration in the massive Thirring model at finite T
  and $\mu$: Dimensional reduction and the Coulomb gas

We show that in certain limits the (1+1)-dimensional massive Thirring model
at finite temperature $T$ is equivalent to a one-dimensional Coulomb gas of
charged particles at the same $T$. This equivalence is then used to explore the
phase structure of the massive Thirring model. For strong coupling and $T>>m$
(the fermion mass) the system is shown to behave as a free gas of "molecules"
(charge pairs in the Coulomb gas terminology) made of pairs of chiral
condensates. This binding of chiral condensates is responsible for the
restoration of chiral symmetry as $T\to\infty$. In addition, when a fermion
chemical potential $\mu\neq 0$ is included, the analogy with a Coulomb gas
still holds with $\mu$ playing the role of a purely imaginary external electric
field. For small $T$ and $\mu$ we find a typical massive Fermi gas behaviour
for the fermion density, whereas for large $\mu$ it shows chiral restoration by
means of a vanishing effective fermion mass. Some similarities with the chiral
properties of low-energy QCD at finite $T$ and baryon chemical potential are
discussed.Comment: 28 pages, 6 figures, better resolution figures are available upon
  reques
Quasielastic Versus Inelastic and Deep Inelastic Lepton Scattering in
  Nuclei at x > 1

We have made a thorough investigation of the nuclear structure function W_2A
in the region of 0.8 < x < 1.5 and Q^2 < 20 GeV^2, separating the quasielastic
and inelastic plus deep inelastic contributions. The agreement with present
experimental data is good giving support to the results for both channels.
Predictions are made in yet unexplored regions of x and Q^2 to assert the
weight of the quasielastic or inelastic channels. We find that at Q^2 < 4 GeV^2
the structure function is dominated by the quasielastic contributions for x <
1.5, while for values of Q^2 > 15 GeV^2 and the range of x studied the
inelastic channels are over one order of magnitude bigger than the quasielastic
one. The potential of the structure function at x > 1 as a source of
information on nuclear correlations is stressed once more.Comment: 17 pages, LaTeX, 13 PostScript figures, final version to be published
  in Nuclear Physics
High p_T hadron spectra in high-energy heavy-ion collisions

We calculate the hadron spectra in high-energy pp, pA and AA collisions
within a pQCD parton model. Analyses of experimental data show that the
modification of the spectra in pA and AA as compared to that in $pp$ collisions
is consistent with multiple parton scattering scenario and is dictated by the
transition from absorptive soft interaction at low p_T to incoherent hard
parton scattering at high p_T. This analysis not only sheds new light on the
limits to the physics analysis based on thermal fire-ball models but also
provides a more quantitative baseline results on which one can study the
effects of parton energy loss in the hadron spectra at high p_T.Comment: 4 pages in Elsevier LaTex with 2 postscript figures. Talk at Quark
  Matter '99 to be published in the proceeding
Accurate simulation estimates of phase behavior in ternary mixtures with prescribed composition

This paper describes an isobaric semi-grand canonical ensemble Monte Carlo scheme for the accurate study of phase behavior in ternary fluid mixtures under the experimentally relevant conditions of prescribed pressure, temperature and overall composition. It is shown how to tune the relative chemical potentials of the individual components to target some requisite overall composition and how, in regions of phase coexistence, to extract accurate estimates for the compositions and phase fractions of individual coexisting phases. These estimates have finite-size errors that are exponentially small in the system size even when the phase fraction of one phase is vanishingly small, as occurs at the coexistence boundary. The method is illustrated by tracking a path through the composition space of a model ternary Lennard-Jones mixture