Showing papers in "Physics Letters B in 2019"

TL;DR: In this paper, a connection between the distance conjecture and a refined version of the de Sitter conjecture in any parametrically controlled regime of string theory by using Bousso's covariant entropy bound was made.

TL;DR: In this article, the results for pseudo-critical temperatures of QCD chiral crossovers at zero and non-zero values of baryon (B), strangeness (S), electric charge (Q), and isospin (I) chemical potentials were obtained using lattice QCD calculations carried out with two degenerate up and down dynamical quarks and a dynamical strange quark, with quark masses corresponding to physical values of pion and kaon masses in the continuum limit.

TL;DR: In this article, a search for invisible decays of a Higgs boson via vector boson fusion is performed using proton-proton collision data collected with the CMS detector at the LHC in 2016 at a center-of-mass energy root s = 13 TeV, corresponding to an integrated luminosity of 35.9fb(-1).

TL;DR: In this paper, the authors derived short distance constraints for the hadronic light-by-light contribution (HLbL) to the anomalous magnetic moment of the muon in the kinematic region where the three virtual momenta are all large.

TL;DR: In this paper, it was shown that the near-flat limit of pure AdS belongs to the Swampland, as it is necessarily accompanied by an infinite tower of light states.

TL;DR: In this article, a search for high-mass dielectron and dimuon resonances in the mass range of 250 GeV to 6 TeV was performed at the Large Hadron Collider.

TL;DR: In this paper, a simple spherical model consisting of a Schwarzschild black hole of mass M and a dark matter of mass ΔM around it was considered and the general formula for the radius of black-hole shadow was derived.

TL;DR: In this paper, the authors show how to decouple two spherically symmetric and static gravitational sources through the most general possible extension of the so-called Minimal Geometric Deformationdecoupling.

TL;DR: In this paper, the authors constructed phenomenologically viable models of lepton masses and mixing based on modular A 4 invariance broken to residual symmetries Z 3 T or Z 3 S T and Z 2 S respectively.

TL;DR: In this paper, the A 4 modular symmetry was used to predict the CP violation phase δ and the Jarlskog invariant J C P, which is consistent with the observed values.

TL;DR: In this article, a flavor model that the quark sector has S 3 modular symmetry and the lepton sector has A 4 modular symmetry was proposed, which is consistent with experimental data of quark masses, mixing angles and the CP violating phase.

TL;DR: In this article, the authors derive relativistic hydrodynamic equations with a dynamical spin degree of freedom on the basis of an entropy-current analysis, showing that spin density is damped out after a characteristic time scale controlled by transport coefficients introduced in the antisymmetric part of the energy-momentum tensor in the entropy current analysis.

TL;DR: In this article, a new method based on outer automorphisms of the Narain space group is developed to determine flavor symmetries within compactified string theory, and a picture emerges where traditional (discrete) flavor symmetry, CP-like symmetry, and modular symmetry (like T-duality) of string theory combine to unified flavor symmetry.

TL;DR: In this article, the authors investigated the effect of adding an extra particle to the LQ model to improve the LHCb fits of b → s l + l − e −.

TL;DR: In this article, the light-by-light scattering process in ultra-peripheral PbPb collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV is reported.

TL;DR: In this paper, the authors construct the generators of Poincare and conformal groups in the celestial representation and discuss how these symmetries are manifest in the amplitudes, and construct the generator of the conformal group in a two-dimensional sphere describing Minkowski space at null infinity.

TL;DR: In this article, it was shown that the description of a relativistic fluid at local thermodynamic equilibrium depends on the particular quantum stress energy tensor operator chosen, e.g., the canonical or symmetrized Belinfante tensor.

TL;DR: In this article, the strong coupling energy scales in scalar, gauge and gravity sectors all are lifted up to the Planck scale, and it is shown that introducing R 2 -term makes the Higgsinflation and Higgs-dilaton inflation consistent.

TL;DR: In this article, the authors analyse the recent proposal of measuring a quantum gravity phenomenon in the lab by entangling two mesoscopic particles gravitationally, and they give a generally covariant description of this phenomenon, where the relevant effect turns out to be a quantum superposition of proper times.

TL;DR: In this paper, the authors study the LHCb pentaquark candidates P c (4312 ), P c( 4440 ) and P c 4457 ) in the framework of the effective-range expansion and resonance compositeness relations.

TL;DR: In this article, a model based on modular A 4 symmetry containing a dark matter candidate, realizing radiatively induced neutrino mass at one-loop level, was proposed, and the stability of darkmatter candidate can be assured by nonzero value of modular weight and heavy neutral fermion mass hierarchies, which include dark matter under the A 4 triplet, are uniquely determined; M X ≪ M 2 M 3.

TL;DR: In this article, a search for direct production of the supersymmetric partners of electrons or muons is presented in final states with two opposite-charge, same-flavour leptons (electrons and muons), no jets, and large missing transverse momentum.

TL;DR: In this article, the authors measured the yield and nuclear modification factor (R-AA) of the Pb+Pb data at root s(NN) = 5.02 TeV and 25 pb−Pb−1 data at r...

TL;DR: In this article, the transverse momentum (p T ) distribution of Higgs bosons at hadron colliders enables a detailed probe of its production dynamics and is a key ingredient to precision studies of higgs boson properties, but receives very large QCD corrections.

TL;DR: In this article, the authors discuss the impact of the recent untagged analysis of B 0 → D ⁎ l ν ¯ l decays by the Belle Collaboration on the extraction of the CKM element | V c b | and provide updated SM predictions for the b → c τ ν observables R (D ‎ ), P τ, and F L D .

TL;DR: In this article, the authors demonstrate that the dynamics of an interacting dilaton and axion naturally realizes the proposal of early dark energy, where stabilization of the dilaton is in part due to the axion.

TL;DR: In this paper, the nuclear modification factors, derived from the PbPb-to-p p ratio of yields for each state, were studied as functions of meson rapidity and transverse momentum, as well as collision centrality.

TL;DR: In this paper, it was shown that scalar excited initial states cannot rescue single field inflation from the swampland, as they produce large local scalar non-gaussianity, which is in conflict with the Planck upper bound.

TL;DR: In this paper, the ALICE Collaboration presents the first measurements of the chargedparticle multiplicity density, dNch/dη, and total charged-particle multiplier, Nchtot, in Xe-Xe collisions at a centre-of-mass energy per nucleon-nucleon pair of sNN=5.44TeV.

TL;DR: In this article, the authors studied the overlaps of wave functions prepared by turning on sources in the Euclidean path integral and showed that these overlaps give rise to a Kahler structure on the space of sources, which is naturally induced by the Fubini-Study metric.