pinecone/core-2020-05-10-deduplication huggingface dataset:
Integrable quantum field theory with boundaries: the exact g-function

The g-function was introduced by Affleck and Ludwig in the context of
critical quantum systems with boundaries. In the framework of the thermodynamic
Bethe ansatz (TBA) method for relativistic scattering theories, all attempts to
write an exact integral equation for the off-critical version of this quantity
have, up to now, been unsuccesful. We tackle this problem by using an
n-particle cluster expansion, close in spirit to form-factor calculations of
correlators on the plane. The leading contribution already disagrees with all
previous proposals, but a study of this and subsequent terms allows us to
deduce an exact infrared expansion for g, written purely in terms of TBA
pseudoenergies. Although we only treat the thermally-perturbed Ising and the
scaling Lee-Yang models in detail, we propose a general formula for g which
should be valid for any model with entirely diagonal scattering.Comment: 21 pages, 9 figures, Latex 2e. v2: typos fixed and comments added.
  v3: Published version: minor typos corrected, numerical results included and
  a note adde
The Axion Mass in Modular Invariant Supergravity

When supersymmetry is broken by condensates with a single condensing gauge
group, there is a nonanomalous R-symmetry that prevents the universal axion
from acquiring a mass. It has been argued that, in the context of supergravity,
higher dimension operators will break this symmetry and may generate an axion
mass too large to allow the identification of the universal axion with the QCD
axion. We show that such contributions to the axion mass are highly suppressed
in a class of models where the effective Lagrangian for gaugino and matter
condensation respects modular invariance (T-duality).Comment: 10 page
STAR Barrel Electromagnetic Calorimeter Absolute Calibration Using ``Minimum Ionizing Particles'' from Collisions at RHIC

The procedure for the STAR Barrel Electromagnetic Calorimeter (BEMC) absolute calibrations, using penetrating charged particle hits (MIP-hits) from physics events at RHIC, is presented. Its systematic and statistical errors are evaluated. It is shown that, using this technique, the equalization and transfer of the absolute scale from the test beam can be done to a percent level accuracy in a reasonable amount of time for the entire STAR BEMC. MIP-hits would also be an effective tool for continuously monitoring the variations of the BEMC tower's gains, virtually without interference to STAR's main physics program. The method does not rely on simulations for anything other than geometric and some other small corrections, and also for estimations of the systematic errors. It directly transfers measured test beam responses to operations at RHIC
Noise and Inertia-Induced Inhomogeneity in the Distribution of Small
  Particles in Fluid Flows

The dynamics of small spherical neutrally buoyant particulate impurities
immersed in a two-dimensional fluid flow are known to lead to particle
accumulation in the regions of the flow in which rotation dominates over shear,
provided that the Stokes number of the particles is sufficiently small. If the
flow is viewed as a Hamiltonian dynamical system, it can be seen that the
accumulations occur in the nonchaotic parts of the phase space: the
Kolmogorov--Arnold--Moser tori. This has suggested a generalization of these
dynamics to Hamiltonian maps, dubbed a bailout embedding. In this paper we use
a bailout embedding of the standard map to mimic the dynamics of impurities
subject not only to drag but also to fluctuating forces modelled as white
noise. We find that the generation of inhomogeneities associated with the
separation of particle from fluid trajectories is enhanced by the presence of
noise, so that they appear in much broader ranges of the Stokes number than
those allowing spontaneous separation
The SM prediction of g-2 of the muon.

We calculate (g-2)/2 of the muon, by improving the determination of the hadronic vacuum polarisation contribution, a_mu^{had,LO}, and its uncertainties. The different e+e- data sets for each exclusive (and the inclusive) channel are combined in order to obtain the optimum estimate of the cross sections and their uncertainties. QCD sum rules are evaluated in order to resolve an apparent discrepancy between the inclusive data and the sum of the exclusive channels. We conclude a_mu^{had,LO}=(683.1 +- 5.9_{exp} +- 2.0_{rad}) 10^{-10} which, when combined with the other contributions to (g-2)/2, is about 3 sigma below the present world average measurement. \u
A Witness for Coherent Electronic vs Vibronic-Only Oscillations in Ultrafast Spectroscopy

We report a conceptually straightforward witness that distinguishes coherent electronic oscillations from their vibronic-only counterparts in nonlinear optical spectra of molecular aggregates. Coherent oscillations as a function of waiting time in broadband pump/broadband probe spectra correspond to coherent electronic oscillations in the singly excited manifold. Oscillations in individual peaks of 2D electronic spectra do not necessarily yield this conclusion. Our witness is simpler to implement than quantum process tomography and potentially resolves a long-standing controversy on the character of oscillations in ultrafast spectra of photosynthetic light harvesting systems.Chemistry and Chemical Biolog
Communication with SIMP dark mesons via Z'-portal

We consider a consistent extension of the SIMP models with dark mesons by
including a dark U(1)_D gauge symmetry. Dark matter density is determined by a
thermal freeze-out of the $3\to2$ self-annihilation process, thanks to the
Wess-Zumino-Witten term. In the presence of a gauge kinetic mixing between the
dark photon and the SM hypercharge gauge boson, dark mesons can undergo a
sufficient scattering off the Standard Model particles and keep in kinetic
equilibrium until freeze-out in this SIMP scenario. Taking the
SU(N_f)xSU(N_f)/SU(N_f) flavor symmetry under the SU(N_c) confining group, we
show how much complementary the SIMP constraints on the parameters of the dark
photon are for current experimental searches for dark photon.Comment: 16 pages, 6 figures, To appear in Phys. Lett.
Measurement of the forward $Z$ boson production cross-section in $pp$
  collisions at $\sqrt{s}$ = 7 TeV

A measurement of the production cross-section for $Z$ bosons that decay to
muons is presented. The data were recorded by the LHCb detector during $pp$
collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated
luminosity of 1.0 fb$^{-1}$. The cross-section is measured for muons in the
pseudorapidity range $2.0 < \eta < 4.5$ with transverse momenta $p_{T} > 20$
GeV/c. The dimuon mass is restricted to $60 < M_{\mu^{+}\mu^{-}} < 120$
GeV/c$^{2}$. The measured cross-section is
$$\sigma_{Z\rightarrow\mu^{+}\mu^{-}} = (76.0 \pm 0.3 \pm 0.5 \pm 1.0 \pm 1.3)
\, \text{pb}$$ where the uncertainties are due to the sample size, systematic
effects, the beam energy and the luminosity. This result is in good agreement
with theoretical predictions at next-to-next-to-leading order in perturbative
quantum chromodynamics. The cross-section is also measured differentially as a
function of kinematic variables of the $Z$ boson. Ratios of the production
cross-sections of electroweak bosons are presented using updated LHCb
measurements of $W$ boson production. A precise test of the Standard Model is
provided by the measurement of the ratio
$$\frac{\sigma_{W^{+}\rightarrow\mu^{+}\nu_{\mu}} +
\sigma_{W^{-}\rightarrow\mu^{-}\bar{\nu}_{\mu}}}{\sigma_{Z\rightarrow\mu^{+}\mu^{-}}}
= 20.63\pm0.09\pm0.12\pm0.05,$$ where the uncertainty due to luminosity
cancels.Comment: New version in line with version accepted by JHEP. Small changes to
  the layout of figures. Results unchange
Search for Physics Beyond the Standard Model in Events with Two Leptons, Jets, and Missing Transverse Momentum in pp Collisions at $\sqrt{s}$ = 8 TeV

A search is presented for physics beyond the standard model in final states with two opposite-sign same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 19.4 $fb^{−1}$ of proton-proton collisions at $\sqrt{s}$ = 8 TeV collected with the CMS detector at the CERN LHC in 2012. The analysis focuses on searches for a kinematic edge in the invariant mass distribution of the oppositesign same-flavor lepton pair and for final states with an on-shell $Z$ boson. The observations are consistent with expectations from standard model processes and are interpreted in terms of upper limits on the production of supersymmetric particles
Searches for third-generation squark production in fully hadronic final states in proton-proton collisions at s√=8TeV

Searches for third-generation squarks in fully hadronic final states are presented using data samples corresponding to integrated luminosities of 19.4 or 19.7 fb−1, collected at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. Three mutually exclusive searches are presented, each optimized for a different decay topology. They include a multijet search requiring one fully reconstructed top quark, a dijet search requiring one or two jets originating from b quarks, and a monojet search. No excesses above the standard model expectations are seen, and limits are set on top and bottom squark production in the context of simplified models of supersymmetr
Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV

Dimuon and dielectron mass spectra, obtained from data resulting from proton-proton collisions at 8 TeV and recorded by the CMS experiment, are used to search for both narrow resonances and broad deviations from standard model predictions. The data correspond to an integrated luminosity of 20.6 (19.7) inverse femtobarns for the dimuon (dielectron) channel. No evidence for non-standard-model physics is observed and 95% confidence level limits are set on parameters from a number of new physics models. The narrow resonance analyses exclude a Sequential Standard Model Z'[SSM] resonance lighter than 2.90 TeV, a superstring-inspired Z'[psi] lighter than 2.57 TeV, and Randall-Sundrum Kaluza-Klein gravitons with masses below 2.73, 2.35, and 1.27 TeV for couplings of 0.10, 0.05, and 0.01, respectively. A notable feature is that the limits have been calculated in a model-independent way to enable straightforward reinterpretation in any model predicting a resonance structure. The observed events are also interpreted within the framework of two non-resonant analyses: one based on a large extra dimensions model and one based on a quark and lepton compositeness model with a left-left isoscalar contact interaction. Lower limits are established on M[S], the scale characterizing the onset of quantum gravity, which range from 4.9 to 3.3 TeV, where the number of additional spatial dimensions varies from 3 to 7. Similarly, lower limits on Lambda, the energy scale parameter for the contact interaction, are found to be 12.0 (15.2) TeV for destructive (constructive) interference in the dimuon channel and 13.5 (18.3) TeV in the dielectron channel
Copying garbage collection for the WAM: To mark or not to mark?

Garbage collection by copying is becoming more and more popular for Prolog. Copying requires a marking phase in order to be safe: safeness means that the to-space is guaranteed not to overflow. However, some systems use a copying garbage collector without marking prior to copying, and instead postpone the copying of potentially unsafe cells. Such systems only collect small portions of the heap and it is not clear whether postponing works while collecting the whole heap. Moreover, it is shown here that postponing does not solve the problem in a fundamental way. Since marking takes time, it is worth studying the tradeoffs involved. These observations have prompted the experimentation with a series of garbage collectors based on copying without marking and without postponing. In particular, variants were implemented that are named dangerous, optimistic and cautious copying which exhibit various degrees of unsafeness. Versions of each have been implemented based on recursive copying as in most implementations of copy_term/2 and on the Cheney algorithm. Performance on benchmarks suggests that large performance gains can be obtained by skipping the marking phase, that dangerous copying is still relatively safe but can be costly, and that the additional effort of cautious copying over optimistic copying is not worth it. The optimistic collectors based on recursive copying perform best and slightly better than the ones based on Cheney. Cache performance measurements back up the benchmark results.status: publishe
Higgs phenomenology in Type-I 2HDM with U(1) H Higgs gauge symmetry

It is well known that generic two-Higgs-doublet models (2HDMs) suffer from potentially large Higgs-mediated flavor-changing neutral current (FCNC) problem, unless additional symmetries are imposed on the Higgs fields thereby respecting the Natural Flavor Conservation Criterion (NFC) by Glashow and Weinberg. A common way to respect the NFC is to impose Z 2 symmetry which is softly broken by a dim-2 operator. Another new way is to introduce local U(1) H Higgs flavor symmetry that distinguishes one Higgs doublet from the other. In this paper, we consider the Higgs phenomenology in Type-I 2HDMs with the U(1) H symmetry with the simplest U(1) H assignments that the SM fermions are all neutral under U(1) H , and we make detailed comparison with the ordinary Type-I 2HDM. After imposing various constraints such as vacuum stability and perturbativity as well as the electroweak precision observables and collider search bounds on charged Higgs boson, we find that the allowed Higgs signal strengths in our model are much broader than those in the ordinary Type-I 2HDM, because of newly introduced U(1) H -charged singlet scalar and U(1) H gauge boson. Still the ATLAS data on gg → h → γγ cannot be accommodated. Our model could be distinguished from the ordinary 2HDM with the Z 2 symmetry in a certain parameter region and some channels. If the couplings of the new boson turn out to be close to those in the SM, it would be essential to search for extra U(1) H gauge boson and/or one more neutral scalar boson to distinguish two models
Three-gluon running coupling from lattice QCD at N f = 2 + 1 + 1: a consistency check of the OPE approach

We present a lattice calculation of the renormalized running coupling constant in symmetric (MOM) and asymmetric $ \left( {\widetilde{\mathrm{MOM}}} \right) $ momentum substraction schemes including u , d , s and c quarks in the sea. An Operator Product Expansion dominated by the dimension-two 〈 A 2 〉 condensate is used to fit the running of the coupling. We argue that the agreement in the predicted 〈 A 2 〉 condensate for both schemes is a strong support for the validity of the OPE approach and the effect of this non-gauge invariant condensate over the running of the strong coupling
A rotating hairy AdS 3 black hole with the metric having only one Killing vector field

We perturbatively construct a three-dimensional rotating AdS black hole with a real scalar hair. We choose the mass of a scalar field slightly above the Breitenlohner-Freedman bound and impose a general boundary condition for the bulk scalar field at AdS infinity. We first show that rotating BTZ black holes are unstable against scalar field perturbations under our more general boundary condition. Next we construct a rotating hairy black hole perturbatively with respect to a small amplitude ϵ of the scalar field, up to O ( ϵ 4 ). Our hairy black hole is stationary and exhibits no dissipation, but the lumps of the non-linearly perturbed geometry break axial symmetry, thus providing the first example of a rotating black hole whose metric admits only one Killing vector field. Furthermore, we numerically show that the entropy of our hairy black hole is larger than that of the BTZ black hole with the same energy and the angular momentum. We briefly discuss if our rotating hairy black hole in lumpy geometry could be the endpoint of the instability
An Sl(2, Z) multiplet of nine-dimensional type II supergravity theories

51 páginas, 5 figuras.-- El PDF del artículo es la versión pre-print.We show that only by performing generalized dimensional reductions all possible brane configurations are taken into account and one gets the complete lower-dimensional theory. We apply this idea to the reduction of type IIB supergravity in an SL(2, Z)-covariant way and establish T-duality for the type II superstring effective action in the context of generalized dimensional reduction giving the corresponding generalized Buscher's T-duality rules.\ud
\ud
The full (generalized) dimensional reduction involves all the S-duals of D7-branes: Q7-branes and a sort of composite 7-branes. The three species constitute an SL(2, Z) triplet. Their presence induces the appearance of the triplet of masses of the 9-dimensional theory.\ud
\ud
The T-duals, including a “KK-8A-brane”, which must have a compact transverse dimension have to be considered in the type IIA side. Compactification of 11-dimensional KK-9M-branes (a.k.a. M9-branes) on the compact transverse dimension give D8-branes while compactification on a world-volume dimension gives KK-8A-branes. The presence of these KK-monopole-type objects breaks translation invariance and two of them given rise to an SL(2, Z)-covariant massive 11-dimensional supergravity whose reduction gives the massive 9-dimensional type II theories.The work of P.M. has been partially supported by\ud
the European Union under contract number ERBFMBI-CT96-0616. The work of T.O. is supported by the European Union TMR program FMRX-CT96-0012 Integrability, Nonperturbative\ud
Effects, and Symmetry in Quantum Field Theory and by the Spanish grant\ud
AEN96-1655.Peer reviewe
Helium mediated deposition: Modeling the He-TiO 2(110)- (1×1) interaction potential and application to the collision of a helium droplet from density functional calculations

This paper is the first of a two-part series dealing with quantum-mechanical (density-functional-based) studies of helium-mediated deposition of catalytic species on the rutile TiO 2(110)-(11) surface. The interaction of helium with the TiO 2(110)-(11) surface is first evaluated using the Perdew-Burke-Ernzerhof functional at a numerical grid dense enough to build an analytical three-dimensional potential energy surface. Three (two prototype) potential models for the He-surface interaction in helium scattering calculations are analyzed to build the analytical potential energy surface: (1) the hard-corrugated-wall potential model; (2) the corrugated-Morse potential model; and (3) the three-dimensional Morse potential model. Different model potentials are then used to study the dynamics upon collision of a 4He 300 cluster with the TiO 2(110) surface at zero temperature within the framework of a time-dependent density-functional approach for the quantum fluid [D. Mateo, D. Jin, M. Barranco, and M. Pi, J. Chem. Phys. 134, 044507 (2011)] and classical dynamics calculations. The laterally averaged density functional theory-based potential with an added long-range dispersion interaction term is further applied. At variance with classical dynamics calculations, showing helium droplet splashing out of the surface at impact, the time evolution of the macroscopic helium wave-function predicts that the helium droplet spreads on the rutile surface and leads to the formation of a thin film above the substrate. This work thus provides a basis for simulating helium mediated deposition of metallic clusters embedded within helium nanodroplets. © 2012 American Institute of Physics.This work has been performed under Grant Nos. FIS2011-29596-C02-01 and FIS2011-28617-C02-01 from DGI, Spain (FEDER), Grant No. 2009SGR1289 from Generalitat de Catalunya, and Grant No. CCG08-CSIC/ESP- 3680 from CSIC-CM. The support of COST Action CM1002 (CODECS) and the MICINN Grants Nos. FIS2007-62006 and FIS2010-18132 are also gratefully acknowledged. N.F.A. has been supported by a predoctoral JAE fellowship from the CSIC and D.M. by the ME (Spain) FPU program, Grant No. AP2008-04343.Peer Reviewe
On deformation sources in volcanic areas: Modeling the Campi Flegrei (Italy) 1982–84 unrest

Deformation sources in volcanic areas are generally modeled in terms of pressurized tri-axial ellipsoids or
pressurized cracks with simple geometrical shapes, embedded in a homogeneous half-space. However, the
assumption of a particular source mechanism and the neglect of medium heterogeneities bias significantly the
estimate of source parameters. A more general approach describes the deformation source in terms of a
suitable moment tensor. Ratios between moment tensor eigenvalues are shown to provide a strong diagnostic
tool for the physical interpretation of the deformation source and medium heterogeneities may be accounted
for through 3D finite element computations. Leveling and EDM data, collected during the 1982–84 unrest
episode at Campi Flegrei (Italy), are employed to retrieve the complete moment tensor according to a
Bayesian inversion procedure, considering the heterogeneous elastic structure of the volcanic area. Best fitting
moment tensors are found to be incompatible with any pressurized ellipsoid or crack. Taking into account the
deflation of a deeper magma reservoir, which accompanies the inflation of a shallower source, data fit
improves considerably but the retrieved moment tensor of the shallow source is found to be incompatible
with pressurized ellipsoids, still. Looking for alternative physical models of the dislocation source, we find that
the best fit moment tensor can be best interpreted in terms of a mixed mode (shear and tensile) dislocation at
5.5 km depth, striking EW and dipping by ~25°–30° to the North. Gravity changes are found to be compatible
with the intrusion of ~60–70·10^6 m^3 of volatile rich magma with density ~2400 kg/m^3