Showing papers in "Physics Letters B in 2013"

TL;DR: In this paper, the spin and parity quantum numbers of the Higgs boson were studied based on the collision data collected by the ATLAS experiment at the LHC, and the results showed that the standard model spin-parity J(...

TL;DR: In this paper, two-particle angular correlations for charged particles emitted in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are presented.

TL;DR: In this paper, the ALICE detector was used to measure the correlations between charged trigger and associated particles in p-Pb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5 < P-T, P-assoc < P -T,Ptrig < 4 GeV/c.

TL;DR: In this article, the production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs were measured using the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of about 25/fb.

TL;DR: In this paper, measurements of two-and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth.

TL;DR: In this paper, the Newman-Janis algorithm was applied to the Hayward and the Bardeen metrics to obtain a family of rotating solutions with a minimal violation of the weak energy condition and without the questionable property of the curvature invariants at the origin.

TL;DR: Recently, the Planck satellite data as discussed by the authors showed that all the simplest inflaton models are disfavored statistically relative to those with plateau-like potentials, and that the favored inflaton potentia ls are exponentially unlikely according to the logic of the inflationary paradigm itself.

TL;DR: In this article, the stellar production of vector states V within the minimal model of "dark photons" was studied and it was shown that when the Stuckelberg mass of the dark vector becomes smaller than plasma frequency, the emission rate is dominated by the production of the longitudinal modes of V, and scales as κ 2 m V 2, where κ and m V are the mixing angle with the photon and the mass of a dark state.

TL;DR: In this article, the authors analyzed the decay ψ ( 4160 ) → π + π − J / ψ, and reported observation of the charged state Z c ± ( 3900 ) decaying into π ± J/ ψ at a significance level of > 5 σ.

TL;DR: In this paper, the authors derived the nuclear symmetry energy E sym ( ρ ) and its slope L ρ at an arbitrary density ρ are determined by the nucleon isovector (symmetry) potential U sym( ρ, k ) and their momentum dependence ∂ U sym ∂ k.

TL;DR: In this paper, it was shown that hair is an artifact of the semi-classical treatment and that in the quantum picture hair appears as an inverse mass-square effect, whereas in the standard view classically black holes carry no hair and quantum hair is at best exponentially weak.

TL;DR: In this paper, a non-Abelian gauge field model is proposed, which is based on a gauge field theory with a generic non-abelian group minimally coupled to gravity.

TL;DR: In this article, the connection between linear realizations of the electroweak symmetry breaking mechanism and non-linear realizations with a light Higgs-like particle present is explored, and the analysis is reduced by nature to the consideration of those flavor-conserving operators that can be written in terms of pure-gauge or gauge-Higgs ones via the equations of motion.

TL;DR: In this article, a general f (R, T, R μ ν T μν ) theory with dynamical Lorentz symmetry breaking is proposed, and the reconstruction of the above action is explicitly done, including the numerical reconstruction for the occurrence of ΛCDM universe.

TL;DR: In this paper, the authors measured the effect of jet suppression in heavy ion collisions at the LHC and provided a direct sensitivity to the physics of jet quenching, using a sample of lead-lead collisions at root S-NN = 2.76 TeV.

TL;DR: In this article, the mass splitting at two-loop level was investigated and it was shown that the splitting is reduced by a few MeV compared to the one-loop calculation.

TL;DR: In this paper, the authors measured the azimuthal anisotropic flow coefficients for unidentified charged particles, pions, and (anti-)protons in Pb-Pb collisions at root SNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider.

TL;DR: In this article, a parton distribution function with an explicit transverse momentum dependence can be properly defined in a regularization-scheme independent manner, by considering a factorized form of the transverse magnitude dependent spectrum for the production of a heavy lepton pair in Drell-Yan reaction.

TL;DR: In this article, a new description of the jet quenching phenomenon observed in nuclear collisions at high energies is proposed, in which coherent parton branching plays a central role, based on the appearance of a dynamically generated scale, which controls the transverse resolution power of the medium to simultaneously propagating color probes.

TL;DR: In this paper, an upper bound of 90% C.L. on the ratio between the U coupling constant and the fine structure constant of alpha/alpha < 1.7 fb(-1) was established.

TL;DR: In this paper, two-particle correlations in relative rapidity and azimuth are studied for the pPb collisions at the LHC energy of s NN = 5.02 TeV in the framework of event-by-event (3 + 1 ) -dimensional viscous hydrodynamics.

TL;DR: In this article, the first study of isolated photon + jet correlations in relativistic heavy ion collisions is reported using data from PbPb collisions at a centre-of-mass energy of 2.76 TeV2.

TL;DR: In this article, the authors analyze the extent to which the LHC and Tevatron results as of the end of 2012 constrain invisible (or undetected) decays of the Higgs boson-like state at ∼ 125 GeV.

TL;DR: In this article, the authors presented the construction of the Maxwell equal area law in the Hawking temperature graph for a charged black hole in anti-deSitter background. But their work was limited to the case of large and liquid black holes.

TL;DR: In this article, the authors studied the long-range correlations observed in p + Pb collisions at root s(NN) = 5.02 TeV, the second-order anisotropy parameter of charged particles.

TL;DR: In this article, a minimal viable extension of the standard model with classical scale symmetry was constructed, and the scale-invariant and CP-symmetric Higgs potential generated radiative electroweak symmetry breaking.

TL;DR: The average transverse momentum (p(T)) versus the charged-particle multiplicity N-ch was measured in p-Pb collisions at a collision energy per nucleon-nucleon root S-NN = 5.02 TeV and in pp collisions at collision energies of root s = 0.9, 2.76, and 7 TeV in the kinematic range 0.15 < p(T) < 10.3 with the ALICE apparatus at the LHC.

TL;DR: In this article, the authors construct D = 10 type II supersymmetric double field theory, which unifies type IIA and IIB supergravities in a manifestly covariant manner with respect to O ( 10, 10 ) T-duality and a pair of local Lorentz groups.

TL;DR: In this paper, a search for a Higgs boson decaying into a Z boson and a photon was performed using proton-proton collision datasets recorded by the CMS detector at the LHC.

TL;DR: In this article, changes in the transverse momentum distributions with beam energy were studied using the Tsallis distribution as a parameterization, and the dependence of the parameters q, T and the volume were determined as a function of beam energy.