pinecone/core-2020-05-10-deduplication huggingface dataset:
Five dimensional $O(N)$-symmetric CFTs from conformal bootstrap

We investigate the conformal bootstrap approach to $O(N)$ symmetric CFTs in
five dimension with particular emphasis on the lower bound on the current
central charge. The bound has a local minimum for all $N>1$, and in the large
$N$ limit we propose that the minimum is saturated by the critical $O(N)$
vector model at the UV fixed point, the existence of which has been recently
argued by Fei, Giombi, and Klebanov. The location of the minimum is generically
different from the minimum of the lower bound of the energy-momentum tensor
central charge when it exists for smaller $N$.
  To better understand the situation, we examine the lower bounds of the
current central charge of $O(N)$ symmetric CFTs in three dimension to compare.
We find the similar agreement in the large $N$ limit but the discrepancy for
smaller $N$ with the other sectors of the conformal bootstrap.Comment: 5 pages, 6 figures. v2: minor change
Hanany-Witten effect and SL(2,Z) dualities in matrix models

We provide tests of dualities for three-dimensional N=4 quiver SCFTs with
brane realizations in IIB string theory, by matching their exact partition
functions on $S^3$. The dualities are generated by SL(2,Z) transformations and
Hanany-Witten 5-brane moves. These contain mirror symmetry as well as dualities
identifiying fixed points of Yang-Mills quivers and Chern-Simons theories. The
partition function is given by a matrix model, that can be nicely rearranged
into a sequence of factors mimicking the brane realization. Identities obeyed
by these elementary factors can be used to match the partition functions of
dual theories, providing tests for the full web of dualities. In particular we
are able to check mirror symmetry for linear and circular quivers with gauge
nodes of arbitrary ranks. Our analysis also leads to a proof of a conjectured
formula evaluating the matrix models of linear quiver theories.Comment: 65 pages, 23 figures, v2, minor clarifications added, version
  published on JHE
Cardy-Verlinde Formula and Asymptotically de Sitter Spaces

In this paper we discuss the question of whether the entropy of cosmological
horizon in some asymptotically de Sitter spaces can be described by the
Cardy-Verlinde formula, which is supposed to be an entropy formula of conformal
field theory in any dimension. For the Schwarzschild-de Sitter solution,
although the gravitational mass is always negative (in the sense of the
prescription in hep-th/0110108 to calculate the conserved charges of
asymptotically de Sitter spaces), we find that indeed the entropy of
cosmological horizon can be given by using naively the Cardy-Verlinde formula.
The entropy of pure de Sitter spaces can also be expressed by the
Cardy-Verlinde formula. For the topological de Sitter solutions, which have a
cosmological horizon and a naked singularity, the Cardy-Verlinde formula also
works well. Our result is in favour of the dS/CFT correspondence.Comment: Latex, 12 pages, v2: references correcte
Exact solution for the spin-s XXZ quantum chain with non-diagonal twists

We study integrable vertex models and quantum spin chains with toroidal boundary conditions. An interesting class of such boundaries is associated with non-diagonal twist matrices. For such models there are no trivial reference states upon which a Bethe ansatz calculation can be constructed, in contrast to the well-known case of periodic boundary conditions. In this paper we show how the transfer matrix eigenvalue expression for the spin-s XXZ chain twisted by the charge-conjugation matrix can in fact be obtained. The technique used is the generalization to spin-s of the functional relation method based on ``pair-propagation through a vertex''. The Bethe ansatz-type equations obtained reduce, in the case of lattice size N=1, to those recently found for the Hofstadter problem of Bloch electrons on a square lattice in a magnetic field
Tachyon kinks on non BPS D-branes

We consider solitonic solutions of the DBI tachyon effective action for a
non-BPS brane. When wrapped on a circle, these solutions are regular and have a
finite energy. We show that in the decompactified limit, these solitons give
Sen's infinitely thin finite energy kink -- interpreted as a BPS brane --
provided that some conditions on the potential hold. In particular, if for
large $T$ the potential is exponential, $V = e^{-T^a}$, then Sen's solution is
only found for $a<1$. For power-law potentials $V = 1/T^b$, one must have
$b>1$. If these conditions are not satisfied, we show that the lowest energy
configuration is the unstable tachyon vacuum with no kinks. We examine the
stability of the solitons and the spectrum of small perturbations.Comment: 16 pages, 2 figure
Maxwell-Chern-Simons Theory is Free for Marginally Noncommutative
  Spacetimes

We have conclusively established the duality between noncommutative
  Maxwell-Chern-Simons theory and Self-Dual model, the latter in ordinary
spacetime, to the first non-trivial order in the noncommutativity parameter
$\theta^{\mu\nu}$, with $\theta^{0i}=0$. This shows that the former theory is
free for marginally noncommutative spacetimes. A $\theta$-generalized covariant
mapping between the variables of the two models in question has been derived
explicitly, that converts one model to the other, including the symplectic
structure and action.Comment: Title modified, Slightly enlarged version, No change in math.
  content, Version to appear in Phys.Lett.
Scattering of Solitons in Derivative Nonlinear Schr\"{o}dinger Model

We show that the chiral soliton model recently introduced by Aglietti et al.
can be made integrable by adding an attractive potential with a fixed
coefficient. The modified model is equivalent to the derivative nonlinear
Schr\"{o}dinger model which does not possess parity and Galilean invariance. We
obtain explicit one and two classical soliton solutions and show that in the
weak coupling limit, they correctly reproduce the bound state energy as well as
the time delay of two-body quantum mechanics of the model.Comment: 8 pages, Late
Is smaller always stiffer? On size effects in supposedly generalized continua

Heterogeneous materials having constitutive behaviour described by more generalized continuum theories incorporating additional degrees of freedom such as couple stress, micropolar or micromorphic elasticity are expected to exhibit size effects in which there is an apparent increase in stiffness as the size scale reduces. Here we briefly demonstrate that for a simple heterogeneous material the size effect predicted when loaded in bending depends on the nature of the sample surface. Diverse size effects may thus be exhibited by the same material. We then show by detailed finite element analysis of a more representative material with regular heterogeneity that this diversity of size effects might actually be observed in practice thereby providing an explanation for the contradictory size effects that have sometimes been reported for real materials
Toward a solution to the $R_{AA}$ and $v_2$ puzzle for heavy quarks

The heavy quarks constitutes a unique probe of the quark-gluon plasma
properties. Both at RHIC and LHC energies a puzzling relation between the
nuclear modification factor $R_{AA}(p_T)$ and the elliptic flow $v_2(p_T)$ has
been observed which challenged all the existing models, especially for D
mesons. We discuss how the temperature dependence of the heavy quark drag
coefficient is responsible for a large part of such a puzzle. In particular, we
have considered four different models to evaluate the temperature dependence of
drag and diffusion coefficients propagating through a quark gluon plasma (QGP).
All the four different models are set to reproduce the same $R_{AA}(p_T)$
observed in experiments at RHIC and LHC energy. We point out that for the same
$R_{AA}(p_T)$ one can generate 2-3 times more $v_2$ depending on the
temperature dependence of the heavy quark drag coefficient. A non-decreasing
drag coefficient as $ T \rightarrow\ T_c \,$ is a major ingredient for a
simultaneous description of $R_{AA}(p_T)$ and $v_2(p_T)$.Comment: 7 pages, 6 figures, Accepted for publication in Physics Letters
Angular coefficients of Z bosons produced in pp collisions at sqrt(s) =
  8 TeV and decaying to mu+mu- as a function of transverse momentum and
  rapidity

Measurements of the five most significant angular coefficients, A[0] through
A[4], for Z bosons produced in pp collisions at sqrt(s) = 8 TeV and decaying to
mu+mu- are presented as a function of the transverse momentum and rapidity of Z
boson. The integrated luminosity of the dataset collected with the CMS detector
at the LHC corresponds to 19.7 inverse femtobarns. These measurements provide
comprehensive information about Z boson production mechanisms, and are compared
to QCD predictions at leading order, next-to-leading order, and
next-to-next-to-leading order in perturbation theory.Comment: Replaced with published version. Added journal reference and DO
A laboratory study of low-mode internal tide scattering by
  finite-amplitude topography

We present the first laboratory experimental results concerning the
scattering of a low-mode internal tide by a gaussian topography. Experiments
performed at the Coriolis Platform in Grenoble used a recently-conceived
internal wave generator as a means of producing a high-quality mode-1 wave
field. The evolution of the wave field in the absence and presence of a
supercritical Gaussian was studied by performing spatiotemporal modal
decompositions of velocity field data obtained using Particle Image Velocimetry
(PIV). The results support predictions that large-amplitude supercritical
topography produces significant reflection of the internal tide and transfer of
energy from low to high modes
$\eta$ meson production of high-energy nuclear collisions at NLO

The transverse momentum spectrum of $\eta$ meson in relativistic heavy-ion
collisions is studied at the next-to-leading-order (NLO) within the
perturbative QCD, where the jet quenching effect in the QGP is incorporated
with the effectively medium-modified $\eta$ fragmentation functions using the
higher-twist approach. We show that the theoretical simulations could give nice
descriptions of PHENIX data on $\eta$ meson in both $\rm p+p$ and central $\rm
Au+Au$ collisions at the RHIC, and also provide numerical predictions of $\eta$
spectra in central $\rm Pb+Pb$ collisions with $\sqrt{s_{NN}}=2.76$~TeV at the
LHC. The ratios of $\eta/\pi^0$ in $\rm p+p$ and in central $\rm Au+Au$
collisions at $200$~GeV are found to overlap in a wide $p_T$ region, which
matches well the measured ratio $\eta / \pi^0$ by PHENIX. We demonstrate that,
at the asymptotic region when $p_{T} \rightarrow \infty$ the ratios of
$\eta/\pi^{0}$ in both $\rm Au+Au$ and $\rm p+p$ are almost determined only by
quark jets fragmentation and thus approach to the one in $e^{+} e^{-}$
scattering; in addition, the almost identical gluon (quark) contribution
fractions to $\eta$ and to $\pi$ result in a rather moderate variation of
$\eta/\pi^{0}$ distribution at intermediate and high $p_T$ region in $\rm A+A$
relative to that in $\rm p+p$; while a slightly higher $\eta/\pi^{0}$ at small
$p_T$ in $\rm Au+Au$ can be observed due to larger suppression of gluon
contribution fraction to $\pi^{0}$ as compared to the one to $\eta$. The
theoretical prediction for $\eta / \pi^0$ at the LHC has also been presented.Comment: 7 pages, 8 figures, 2 typos corrected, revision for publicatio
Development and Validation of a Symptom-Based Activity Index for Adults with Eosinophilic Esophagitis

BACKGROUND\ud
\ud
& Aims: Standardized instruments are needed to assess the activity of eosinophilic esophagitis (EoE), to provide endpoints for clinical trials and observational studies. We aimed to develop and validate a patient-reported outcome (PRO) instrument and score, based on items that could account for variations in patients' assessments of disease severity. We also evaluated relationships between patients' assessment of disease severity and EoE-associated endoscopic, histologic, and laboratory findings.\ud
\ud
METHODS\ud
\ud
We collected information from 186 patients with EoE in Switzerland and the US (69.4% male; median age, 43 years) via surveys (n = 135), focus groups (n = 27), and semi-structured interviews (n = 24). Items were generated for the instruments to assess biologic activity based on physician input. Linear regression was used to quantify the extent to which variations in patient-reported disease characteristics could account for variations in patients' assessment of EoE severity. The PRO instrument was prospectively used in 153 adult patients with EoE (72.5% male; median age, 38 years), and validated in an independent group of 120 patients with EoE (60.8% male; median age, 40.5 years).\ud
\ud
RESULTS\ud
\ud
Seven PRO factors that are used to assess characteristics of dysphagia, behavioral adaptations to living with dysphagia, and pain while swallowing accounted for 67% of the variation in patients' assessment of disease severity. Based on statistical consideration and patient input, a 7-day recall period was selected. Highly active EoE, based on endoscopic and histologic findings, was associated with an increase in patient-assessed disease severity. In the validation study, the mean difference between patient assessment of EoE severity and PRO score was 0.13 (on a scale from 0 to 10).\ud
\ud
CONCLUSIONS\ud
\ud
We developed and validated an EoE scoring system based on 7 PRO items that assesses symptoms over a 7-day recall period. Clinicaltrials.gov number: NCT00939263
Antarctic ice rises and rumples: their properties and significance for ice-sheet dynamics and evolution

Locally grounded features in ice shelves, called ice rises and rumples, play a key role buttressing discharge from the Antarctic Ice Sheet and regulating its contribution to sea level. Ice rises typically rise several hundreds of meters above the surrounding ice shelf; shelf flow is diverted around them. On the other hand, shelf ice flows across ice rumples, which typically rise only a few tens of meters above the ice shelf. Ice rises contain rich histories of deglaciation and climate that extend back over timescales ranging from a few millennia to beyond the last glacial maximum. Numerical model results have shown that the buttressing effects of ice rises and rumples are significant, but details of processes and how they evolve remain poorly understood. Fundamental information about the conditions and processes that cause transitions between floating ice shelves, ice rises and ice rumples is needed in order to assess their impact on ice-sheet behavior. Targeted high-resolution observational data are needed to evaluate and improve prognostic numerical models and parameterizations of the effects of small-scale pinning points on grounding-zone dynamics
Production of inclusive gamma(1S) and gamma(2S) in p-Pb collisions at, root S-NN=5.02 TeV

We report on the production of inclusive Υ (1S) and Υ (2S) in p–Pb collisions at √sNN = 5.02 TeV at the LHC. The measurement is performed with the ALICE detector at backward (−4.46 &lt; ycms &lt; −2.96) and forward (2.03 &lt; ycms &lt; 3.53) rapidity down to zero transverse momentum. The pro- duction cross sections of the Υ (1S) and Υ (2S) are presented, as well as the nuclear modification factor and the ratio of the forward to backward yields of Υ (1S). A suppression of the inclusive Υ (1S) yield in p–Pb collisions with respect to the yield from pp collisions scaled by the number of binary nucleon-nucleon collisions is observed at forward rapidity but not at backward rapidity. The results are compared to theoretical model calculations including nuclear shadowing or partonic energy loss effects
Angular coefficients of Z bosons produced in pp collisions at s=8 TeV and decaying to μ+μ- as a function of transverse momentum and rapidity

Measurements of the five most significant angular coefficients, A0A0 through A4A4, for Z bosons produced in pp collisions at View the MathML sources=8 TeV and decaying to μ+μ−μ+μ− are presented as a function of the transverse momentum and rapidity of the Z boson. The integrated luminosity of the dataset collected with the CMS detector at the LHC corresponds to View the MathML source19.7fb−1. These measurements provide comprehensive information about the Z boson production mechanisms, and are compared to the QCD predictions at leading order, next-to-leading order, and next-to-next-to-leading order in perturbation theory
The Extended Cartan Homotopy Formula and a subspace separation method for Chern-Simons theory

12 pages, 1 figure.-- MSC codes: 57R20, 70S15, 81T60.-- ISI Article Identifier: 000246408200003.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-th/0603061Printed version published in May 2007.In the context of Chern-Simons (CS) Theory, a subspace separation method for the Lagrangian is proposed. The method is based on the iterative use of the Extended Cartan Homotopy Formula, and allows one to (1) separate the action in bulk and boundary contributions, and (2) systematically split the Lagrangian in appropriate reflection of the subspace structure of the gauge algebra. In order to apply the method, one must regard CS forms as a particular case of more general objects known as transgression forms. Five-dimensional CS Supergravity is used as an example to illustrate the method.P. S. was partially supported by FONDECYT Grant 1040624 and by Universidad de Concepción through Semilla Grants 205.011.036-1S, 205.011.037-1S. F. I. and E. R. were supported by Ministerio\ud
de Educación (Chile) through MECESUP Grant UCO 0209 and by grants from the German Academic Exchange Service (DAAD).Peer reviewe
Breed effect on quality veal production in mountain areas: emphasis on meat fatty acid composition

10 páginas, 3 figuras, 6 tablas.This study was designed to compare the quality of veal produced from 'Tudanca × Charolais' cross (n = 6) and Limousin (n = 6) breeds when allowed to feed freely on mountain pastures and suckle naturally from birth to 7. months of age. After 80. days of age calves also had access to concentrate (maximum of 3. kg/day), while mothers did not. At slaughter, Limousin calves were heavier (P< 0.01) and provided better carcass yield (P< 0.05) and conformation (P< 0.001) than Tudanca calves. Tudanca beef provided higher fat content (P< 0.05) was less tough (P< 0.05), and was scored as more tender and juicy (P< 0.1) with higher acceptability than Limousin beef (P< 0.1). In general, Tudanca had a better fatty acid profile than Limousin beef, especially in terms of the content of polyunsaturated (P< 0.05), long-chain polyunsaturated fatty acids (P< 0.05) and their n-6/n-3 ratios (P< 0.1), as well as vaccenic acid (P< 0.1) and the overall trans-18:1 isomer profile.This work was undertaken within the agreement between Fundación Botín and CSIC (2010) to study and develop a beef production and commercialization system in Nansa–Peñarrubia valley. The help provided by farmers, IGM staff and Rubén Plano from Semark AC Group S.A. is very much appreciated. N. Aldai thanks the European Commission for the contract through the ‘Marie Curie (SPACANBEEF, PIOF-GA-2008-220730)’ international program and the Spanish Ministry of Science and Innovation for the recent contract through the ‘Ramón y Cajal (RYC-2011-08593)’ program.Peer reviewe
Continuous SO2 flux measurements for Vulcano Island, Italy

The La Fossa cone of Vulcano Island (Aeolian Archipelago, Italy) is a
closed conduit volcano. Today, Vulcano Island is characterized by
sulfataric activity, with a large fumarolic field that is mainly located in the
summit area. A scanning differential optical absorption spectroscopy
instrument designed by the Optical Sensing Group of Chalmers University
of Technology in Göteborg, Sweden, was installed in the framework of the
European project "Network for Observation of Volcanic and Atmospheric
Change", in March 2008. This study presents the first dataset of SO2
plume fluxes recorded for a closed volcanic system. Between 2008 and
2010, the SO2 fluxes recorded showed average values of 12 t.d—1 during the
normal sulfataric activity of Vulcano Island, with one exceptional event
of strong degassing that occurred between September and December, 2009,
when the SO2 emissions reached up to 100 t.d—1
Saturn's northern auroras as observed using the Hubble Space Telescope

We discuss the features of Saturn’s northern FUV auroras as observed during a program of Hubble Space Telescope observations which executed over 2011–2013 and culminated, along with Cassini observations, in a comprehensive multi-spectral observing campaign. Our 2011–2013 observations of the northern aurora are also compared with those from our 2007–2008 observation of the southern aurora. We show that the variety of morphologies of the northern auroras is broadly consistent with the southern, and determine the statistical equatorward and poleward boundary locations. We find that our boundaries are overall consistent with previous observations, although a modest poleward displacement of the poleward boundaries is due to the increased prevalence of poleward auroral patches in the noon and afternoon sectors during this program, likely due to the solar wind interaction. We also show that the northern auroral oval oscillates with the northern planetary period oscillation (PPO) phase in an elongated ellipse with semi-major axis ∼1.6° oriented along the post-dawn/post-dusk direction. We further show that the northern auroras exhibit dawn-side brightenings at zero northern magnetic PPO phase, although there is mixed evidence of auroral emissions fixed in the rotating frame of the northern PPO current system, such that overall the dependence of the auroras on northern magnetic phase is somewhat weak.Peer-reviewedPublisher Versio
X-ray and UV observations of V751 Cygni in an optical high state

Aims. The VY Scl system (anti-dwarf nova) V751 Cyg is examined following a claim of a super-soft spectrum in the optical low state.\ud
\ud
Methods. A serendipitous XMM-Newton X-ray observation and, 21 months later, Swift X-ray and UV observations, have provided the best such data on this source so far. These optical high-state datasets are used to study the flux and spectral variability of V751 Cyg.\ud
\ud
Results. Both the XMM-Newton and Swift data show evidence for modulation of the X-rays for the first time at the known 3.467 h orbital period of V751 Cyg. In two Swift observations, taken ten days apart, the mean X-ray flux remained unchanged, while the UV source brightened by half a magnitude. The X-ray spectrum was not super-soft during the optical high state, but rather due to multi-temperature optically thin emission, with significant (10 cm) absorption, which was higher in the observation by Swift than that of XMM-Newton. The X-ray flux is harder at orbital minimum, suggesting that the modulation is related to absorption, perhaps linked to the azimuthally asymmetric wind absorption seen previously in H.Peer-reviewedPublisher Versio