pinecone/core-2020-05-10-deduplication huggingface dataset:
Entanglement entropy and higher spin holography in AdS 3

A holographic correspondence has been recently developed between higher spin theories in three-dimensional anti-de Sitter space (AdS 3 ) and two-dimensional Conformal Field Theories (CFTs) with extended symmetries. A class of such dualities involves SL( N, R ) × SL( N, R ) Chern-Simons gauge theories in the (2 + 1)-dimensional bulk space-time, and CFTs with $ {{\mathcal{W}}_N} $ symmetry algebras on the (1 + 1)-dimensional boundary. The topological character of the bulk theory forces one to reconsider standard geometric notions such as black hole horizons and entropy, as well as the usual holographic dictionary. Motivated by this challenge, in this note we present a proposal to compute entanglement entropy in the $ {{\mathcal{W}}_N} $ CFTs via holographic methods. In particular, we introduce a functional constructed from Wilson lines in the bulk Chern-Simons theory that captures the entanglement entropy in the CFTs dual to standard AdS 3 gravity, corresponding to SL(2 , R ) × SL(2 , R ) gauge group, and admits an immediate generalization to the higher spin case. We explicitly evaluate this functional for several known solutions of the bulk theory, including charged black holes dual to thermal CFT states carrying higher spin charge, and show that it reproduces expected features of entanglement entropy, study whether it obeys strong subadditivity, and moreover show that it reduces to the thermal entropy in the appropriate limit
Defects in Chern-Simons theory, gauged WZW models on the brane, and level-rank duality

We consider Hanany-Witten setups of 3- and 5-branes in type IIB string theory that realize N = 1 0 $$ \mathcal{N}=\left(1,0\right) $$ , (2, 0) and (1, 1) gauged WZW models in 1 + 1 dimensions. The gauged WZW models arise as theories residing on the boundary of D3 branes ending on D5 branes. From the point of view of low energy dynamics the D5 branes play the role of half-BPS co-dimension-1 defects (domain walls) in 3d N = 1 $$ \mathcal{N}=1 $$ or N = 2 $$ \mathcal{N}=2 $$ Chern-Simons theories. Extending the analysis of previous works on the subject of boundary conditions in (supersymmetric) Chern-Simons theory, we discuss in detail the field theory construction of a large class of Chern-Simons domain wall theories and its embedding in open string dynamics. Finally, we exhibit how standard brane moves that result to 3d Seiberg duality, translate in our setup to a generalized level-rank duality in gauged-WZW models
Spectral flow and conformal blocks in AdS 3

In this article we investigate the structure of the four-point functions of the AdS 3 -WZNW model. We consider the integral expression for the unflowed four-point correlator involving at least one state in the discrete part of the spectrum derived by analytic continuation from the H 3 + -WZNW model and we show that the conformal blocks can be obtained from those with an extremal-weight state by means of an intertwining operator. We adapt the procedure for dealing with correlators with a single unit of spectral flow charge and we get a factorized integral expression for the corresponding four-point function. We finally transform the formulas back to the space-time picture
Measurement of W-boson helicity fractions in top-quark decays using cos theta

Fully reconstructed a t (t) over bar -> W(+)bW(-)(b) over bar -> l nu q (q) over bar 'b (b) over bar events are used to determine the fractions of right-handed (f(+)) and longitudinally polarized (f(0)) W bosons produced in top-quark decays. The helicity fractions are sensitive to the couplings and the Dirac structure of the Wtb vertex. This Letter reports measurements of the W-boson helicity fractions from two different methods using data corresponding to an integrated luminosity of 1.9 fb(-1) of pp collisions at a center-of-mass energy of 1.96 TeV collected by the CDF II detector operating at the Fermilab Tevatron. Combining the results from the two methods, we find f(0) = 0.62 +/- 0.10(stat) +/- 0.05(syst) under the assumption that f(+) = 0, and f(+) = -0.04 +/- 0.04(stat) +/- 0.03(syst) with f(0) fixed to the theoretically expected value of 0.70. Model-independent fits are also performed and simultaneously determine f(0) =0.66 +/- 0.16(stat) +/- 0.05(syst) and f(+) = -0.03 +/- 0.06(stat) +/- 0.03(syst). All these results are consistent with standard model expectations.We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean Science and Engineering Foundation and the Korean Research Foundation; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland.Peer reviewe
Influence of constituent materials on the impact toughness and fracture mechanisms of hot roll-bonded aluminum multilayer laminates

Two aluminum multilayer laminates have been processed by hot roll bonding\ud
following similar processing paths. The first one is constituted by alternated Al 2024\ud
and Al 1050 layers (ALH19) and the second one by alternated Al 7075 and Al 1050\ud
layers (ADH19). The influence of the constituent materials in the multilayer laminates\ud
both during the processing at high temperature, and during the subsequent mechanical\ud
characterization has been analyzed. The mechanical behavior of the as-received\ud
materials at the processing conditions has been characterized by hot torsion. Multilayer\ud
laminates have been tested at room temperature under impact Charpy tests, three-point\ud
bend tests and shear tests on the interfaces. The relative toughness increase compared to\ud
the constituent materials was much higher for the ADH19 laminate based on high\ud
strength Al 7075 alloy than for the ALH19 laminate. This is attributed to the different\ud
fracture mechanism.Financial support from CICYT (Project MAT2003-01172 and MAT2006-11202)\ud
is gratefully acknowledged. C.M. Cepeda-Jiménez thanks the Spanish National\ud
Research Council (CSIC) for a I3P contract. We also thank L. del Real-Alarcón for the\ud
welding work, F.F. González-Rodríguez for assistance during hot rolling and J. Chao-\ud
Hermida for assistance with the Charpy impact test. Finally, an especial mention in\ud
memory of P.J. González-Aparicio for his help and assistance with electron microscopy\ud
during all these years is made.Peer reviewe
How affordances associated with a distractor object affect compatibility effects: A study with the computational model TRoPICALS

Seeing an object activates both visual and action codes in the brain. Crucial evidence supporting this view is the observation of object to response compatibility e V ects: perception of an object can facilitate or interfere with the execution of an action (e.g., grasping) even when the viewer has no intention of interacting with the object. TRoPICALS is a computational model that proposes some general principles about the brain mechanisms underlying compatibility e V ects, in particular the idea that top-down bias from prefrontal cortex, and whether it con X icts or not with the actions a V orded by an object, plays a key role in such phenomena. Experiments on compatibility e V ects using a target and a distractor object show the usual posi- tive compatibility e V ect of the target, but also an interesting negative compatibility e V ect of the distractor: responding with a grip compatible with the distractor size produces slower reaction times than the incompatible case. Here, we present an enhanced version of TRoPICALS that repro- duces and explains these new results. This explanation is based on the idea that the prefrontal cortex plays a double role in its top-down guidance of action selection producing: (a) a positive bias in favour of the action requested by the experimental task; (b) a negative bias directed to inhibiting the action evoked by the distractor. The model also pro- vides testable predictions on the possible consequences of damage to volitional circuits such as in Parkinsonian patients
Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at root 8=8 TeV with the ATLAS detector

A search for pair production of vector-like quarks, both up-type (T) and down-type (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 20.3 fb(-1). Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon with high transverse momentum, large missing transverse momentum and multiple jets. Dedicated analyses are performed targeting three cases: a T quark with significant branching ratio to a W boson and a b-quark , and both a T quark and a B quark with significant branching ratio to a Higgs boson and a third-generation quark ( respectively). No significant excess of events above the Standard Model expectation is observed, and 95% CL lower limits are derived on the masses of the vector-like T and B quarks under several branching ratio hypotheses assuming contributions from T -&gt; Wb, Zt, Ht and B -&gt; Wt, Zb, Hb decays. The 95% CL observed lower limits on the T quark mass range between 715 GeV and 950 GeV for all possible values of the branching ratios into the three decay modes, and are the most stringent constraints to date. Additionally, the most restrictive upper bounds on four-top-quark production are set in a number of new physics scenarios.<p>ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1007/JHEP08(2015)105</p
Slip rate of the Düzce segment of the North Anatolian Fault Zone from offset geomorphic markers

We provide new estimates on the Quaternary slip rate of the active transform margin of North Anatolia.
We investigated the area struck by 12 November 1999, Mw 7.1 earthquake, that ruptured the Düzce fault segment. In order to analyze the spectacular tectonically driven cumulative landforms and the drainage pattern settings, we carried out a 1:25 000-scale geological and geomorphological map along the fault trace. We reconstruct and describe, as offset geomorphic markers, right-hand stream deflections and remnant of an old alluvial fan modeled by fluvial terraces. The streams are deflected for a total of about 100 m and the onset of the offset was radiocarbon dated about 7000 yr BP. The two documented and correlated Late Pleistocene, terrace risers are offset of about 300 and 890 m, respectively. These terrace risers were dated by means of Optically Stimulated Luminescence (OSL) method about 21 000 yr BP and 60 000 yr BP. These ages and offsets translate to a constant rate of deformation of the Düzce Fault, at different time scales, of 14.0 ± 1.8 mm/yr and disproves a time-variable model at least for the last 60 000 yr.
Considering the GPS-measured strain accumulation due to the plate motion along this part of the North Anatolian Fault Zone, the Düzce Fault importantly participates to the North Anatolian margin deformation, suggesting a present-day partitioning of displacement rates with the Mudurnu fault to the south and assuming a relevant role in the seismic hazard of the area
Benchmarking selection of parameter values for the Barcelona basic model

Seven teams took part in a benchmarldng exercise on selection of parameter values for the Barcelona Basic Model (BBM) from experimental data on an unsaturated soil. All teams were provided with experimental results from 9 tests performed on a compacted soil in order to determine values for the ten BBM soil constants and an initial value for the hardening parameter. The coordinating team then performed simulations (at stress point level) with the 7 different sets of parameter values, in order to explore the implications of the differences in parameter values and hence to investigate the robustness of existing BBM parameter value selection procedures. The major challenge was found to be selection of values for the constants lambda(0), r, beta, N(0) and p(c) and an initial value for the hardening parameter (p) over bar (0)(0), with the various teams proposing significantly different values for some of these key parameters. A key lesson emerging from the exercise is the importance of choosing a method for selecting values for the parameters beta and p(c) which places the main emphasis on attempting to optimise the match to the experimental spacing of normal compression lines at different values of suction. (C) 2015 Elsevier B.V. All rights reserved.Peer ReviewedPostprint (author's final draft
Surfactant dependent foam stability in the presence and absence of hydrocarbons : from bubble- to bulk-scale

One of the pioneering applications of foam is in enhanced oil recovery (EOR). A major stumbling-block to the success of foam application in EOR is the adverse influence of oil on foam stability. The objectives of the present work were to evaluate the effects of various surfactants and hydrocarbons with well-defined properties on foam stability. To do so, we have conducted a comprehensive series of experiments at bulk- and bubble-scale to investigate the foam stability of four surfactants in the absence and presence of three isoparaffins distinguished by their carbon chain length, density and viscosity. For the bulk foam stability experiments, foam was generated by sparging pure air into surfactant solution in a vertical cylindrical column. An automated camera was used to record the gradual decay of foam as a function of time. The results showed the significant impact of the type of the surfactant on foam stability. Besides, our results illustrated less stable foam in the presence of oil with less adverse impact on foam stability as oil viscosity and density increased. The limitation of the method used in the present study to quantify foam stability, i.e., measuring the decay of foam height over a certain period of time, which is a commonly used method in literature, is discussed here and an alternative approach is proposed to investigate foam stability at bubble-scale to supplement and improve understanding of the physical phenomena controlling foam stability
Composite (pseudo) scalar contributions to muon g-2

We have calculated the composite (pseudo) scalar contributions to the
anomalous magnetic moment of muons in models of walking technicolor. By the
axial or scale anomaly the light scalars such as techni-dilaton, techni-pions
or techni-eta have anomalous couplings to two-photons, which make them natural
candidates for the recent 750 GeV resonance excess, observed at LHC. Due to the
anomalous couplings, their contributions to muon (g-2) are less suppressed and
might explain the current deviation in muon (g-2) measurements from theory.Comment: 9 pages, 2 figures; published versio
HERschel Observations of Edge-on Spirals (HEROES). III. Dust energy
  balance study of IC 2531

We investigate the dust energy balance for the edge-on galaxy IC 2531, one of
the seven galaxies in the HEROES sample. We perform a state-of-the-art
radiative transfer modelling based, for the first time, on a set of optical and
near-infrared galaxy images. We show that taking into account near-infrared
imaging in the modelling significantly improves the constraints on the
retrieved parameters of the dust content. We confirm the result from previous
studies that including a young stellar population in the modelling is important
for explaining the observed stellar energy distribution. However, the
discrepancy between the observed and modelled thermal emission at far-infrared
wavelengths, the so-called dust energy balance problem, is still present: the
model underestimates the observed fluxes by a factor of about two. We compare
two different dust models, and find that dust parameters and thus the spectral
energy distribution in the infrared domain are sensitive to the adopted dust
model. In general, the THEMIS model reproduces the observed emission in the
infrared wavelength domain better than the popular Zubko et al. BARE-GR-S
model. Our study of IC 2531 is a pilot case for detailed and uniform radiative
transfer modelling of the entire HEROES sample, which will shed more light on
the strength and origins of the dust energy balance problem.Comment: 15 pages, 8 figures, Accepted for publication in Astronomy &
  Astrophysic
Linear chaos for the Quick-Thinking-Driver model.

In recent years, the topic of car-following has experimented an increased importance in traffic engineering and safety research. This has become a very interesting topic because of the development of driverless cars (Google driverless cars, http://en.wikipedia.org/wiki/Google_driverless_car). Driving models which describe the interaction between adjacent vehicles in the same lane have a big interest in simulation modeling, such as the Quick-Thinking-Driver model. A non-linear version of it can be given using the logistic map, and then chaos appears. We show that an infinite-dimensional version of the linear model presents a chaotic behaviour using the same approach as for studying chaos of death models of cell growth
Uniform large deviations for the nonlinear Schrödinger equation with multiplicative noise

International audienceUniform large deviations for the laws of the paths of the solutions of the stochastic nonlinear Schrödinger equation when the noise converges to zero are presented. The noise is a real multiplicative Gaussian noise. It is white in time and colored in space. The path space considered allows blow-up and is endowed with a topology analogue to a projective limit topology. Thus a large variety of large deviation principle may be deduced by contraction. As a consequence, asymptotics of the tails of the law of the blow-up time when the noise converges to zero are obtained
Chlorination of RuO2 with gaseous Cl2 between 998 and 1123 K

Employing methods of separation based on selective chlorination it is possible to separate valuable components, such as metals and rare earths, from ores and / or solid wastes. In this paper we study the chlorination reaction of ruthenium oxide. This element is among nuclear fission products, also part of many electronic wastes and numerous catalysts in the chemical industry. The study of the chlorination reaction of ruthenium oxide will allow to analyze in which conditions it is possible to apply gaseous chlorination for ruthenium recovery. No systematic studies on the kinetics and chemical mechanism of ruthenium oxide chlorination are available in the literature. In the present study, we performed a thermodynamic analysis of possible reaction pathways. The reaction products were identified by scanning electron microscopy (SEM) and x-ray Diffraction (xrd), and the experimental conditions for obtaining stable α-RuCl3 by RuO2 chlorination and subsequent heating in Cl2 were established. The starting temperature for the chlorination was determined at 983 K. The observed mass loss is due to formation of volatile products. We analyzed the effects of gas flow rate, crucible geometry, and sample mass on the kinetics of the reaction, in order to establish the corresponding experimental reaction conditions for chemical kinetic control. The effect of temperature was analyzed and an apparent activation energy of 173 ± 8 kJ.mol-1 was obtained for the chlorination reaction.Fil: Bohe, Ana Ester. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche; Argentina. Comision Nacional de Energia Atomica. Gerencia Complejo Tecnologico Pilcaniyeu; ArgentinaFil: Guibaldo, Cristina Noemi. Comisión Nacional de Energía Atómica; ArgentinaFil: de Micco, Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Gerencia Complejo Tecnologico Pilcaniyeu. Division Cinetica Quimica; Argentin
Hunt for new phenomena using large jet multiplicities and missing
  transverse momentum with ATLAS in 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton
  collisions

Results are presented of a search for new particles decaying to large numbers
of jets in association with missing transverse momentum, using 4.7 fb^-1 of pp
collision data at sqrt(s) = 7 TeV collected by the ATLAS experiment at the
Large Hadron Collider in 2011. The event selection requires missing transverse
momentum, no isolated electrons or muons, and from >=6 to >=9 jets. No evidence
is found for physics beyond the Standard Model. The results are interpreted in
the context of a MSUGRA/CMSSM supersymmetric model, where, for large universal
scalar mass m_0, gluino masses smaller than 840 GeV are excluded at the 95%
confidence level, extending previously published limits. Within a simplified
model containing only a gluino octet and a neutralino, gluino masses smaller
than 870 GeV are similarly excluded for neutralino masses below 100 GeV.Comment: 26 pages plus author list (46 pages total), 9 figures, 3 tables,
  revised author list, matches published JHEP versio
Boundary conditions for arbitrarily shaped and tightly focused laser pulses in electromagnetic codes

International audienceInvestigation of laser matter interaction with electromagnetic codes requires to implement sources for the electromagnetic fields. A way to do so is to prescribe the fields at the numerical box boundaries in order to achieve the desired fields inside the numerical box. Here we show that the often used paraxial approximation can lead to unexpected field profiles with strong impact on the laser matter interaction results. We propose an efficient numerical algorithm to compute the required laser boundary conditions consistent with the Maxwell's equations for arbitrarily shaped, tightly focused laser pulses