Showing papers in "Physics Letters B in 2014"

TL;DR: In this article, the 2+1 flavor QCD equation of state has been extended to even finer lattices and now includes ensembles with Nt = 6,8,10,12 up to 16.

TL;DR: In this paper, the authors compute the next-to-next-to leading order hadronic contribution to the muon anomalous magnetic moment originating from the photon vacuum polarization and derive the corresponding three-loop kernel functions using asymptotic expansion techniques.

TL;DR: In this paper, the first complete and fully differential computation of radiative corrections at next-to-next to-leading order in QCD perturbation theory was performed for the production of Zγ pairs at hadron colliders and the impact of the NNLO QCD corrections on the fiducial cross section ranges between 4 and 15%, depending on the applied cuts.

TL;DR: In this article, comprehensive results on π±, K±, k0 S, p(p) and ¯ Λ(Λ)¯ production at mid-rapidity (0 < yCMS < 0.5) in p-Pb collisions at √sNN = 5.02 TeV, measured by the ALICE detector at the LHC, are reported.

TL;DR: In this article, the surface effect of the symmetry potential, which plays an important role in the evolution of the "neutron skin" toward the Neutron drip line, is considered.

TL;DR: Recently, it was shown that insertions of hadronic vacuum polarization at O(α4) generate non-negligible effects in the calculation of the anomalous magnetic moment of the muon as discussed by the authors.

TL;DR: In this article, the authors discuss the limitations of the effective field theory approach to study dark matter at the LHC and quantify the error made when using effective operators to describe processes with very high momentum transfer.

TL;DR: In this paper, the authors constructed a supergravity model whose scalar degrees of freedom arise from a chiral superfield and are solely a scalaron and an axion that is very heavy during the inflationary phase.

TL;DR: In this article, it was shown that in the vicinity of the critical point y(t)(crit) the inflationary indexes acquire an essential dependence on m(t) and on the mass of the Higgs boson M-h.

TL;DR: In this paper, the authors measured the transverse momentum spectra of pi(+/-), K-+/- and p((p) over bar) up to p(T) = 20 GeV/c at mid-rapidity in pp, peripheral (60-80%) and central (0-5%) Pb-Pb collisions.

TL;DR: In this article, the authors re-analyze published proton beam dump data taken at the U70 accelerator at IHEP Serpukhov with the ν-calorimeter I experiment in 1989 to set mass-coupling limits for dark gauge forces.

TL;DR: In this article, predictions for the SM-Higgs-pair production channels of relevance at the LHC were presented for all channels in general, and for gluon-gluon fusion and top-pair associated production in particular, and they were obtained in a fully automatic way within the MadGraph5_aMC@NLO framework.

TL;DR: In this paper, an interesting gravitational model was proposed in order to mimic the effect of Dark Matter, where the variational principle has given a more general equation of motion than that of purely Einsteinian relativity theory, with a possibility of reproducing an effective Dark Matter.

TL;DR: In this paper, the cross-section for the threshold production of the Higgs boson at hadron-colliders at next-to-next-tonext-leading order (N3LO) in perturbative QCD is presented.

TL;DR: In this paper, the authors argue that the recent criticisms of cosmic inflation are based on several problematic assumptions, and they conclude that cosmic inflation is on a stronger footing than ever before.

TL;DR: In this paper, the complex Langevin method is extended to full QCD at non-zero chemical potential, and the use of gauge cooling stabilizes the simulations at small enough lattice spacings.

TL;DR: In this paper, the authors measured the nuclear modification factor in Pb-Pb collisions at root(NN)-N-S = 2.76TeV and showed that a contribution to the nuclear modify factor originates from the charm quark (re) combination in the deconfined partonic medium.

TL;DR: In this paper, the fractional transverse momentum radial distribution (FTSR) is defined as the radial distribution of the jets produced in heavy-ion collisions and the first measurement of jet shapes is presented.

TL;DR: In this paper, nonperturbative transport coefficients for heavy-flavor (HF) diffusion through quark-gluon plasma (QGP), hadronization and hadronic matter are computed in Pb+Pb ( s = 2.76 TeV ) collisions at the LHC.

TL;DR: In this paper, the authors calculate ratios of higher-order susceptibilities quantifying fluctuations in the number of net-protons and in the net-electric charge using the Hadron Resonance Gas (HRG) model.

TL;DR: In this paper, the strangeness content of the nucleon, the pion-nucleon sigma term and the SU(3)F breaking of the baryon masses in the context of Lorentz covariant chiral perturbation theory with explicit decuplet-baryon resonance fields were revisited.

TL;DR: In this article, the hadronic light-by-light contribution to the anomalous magnetic moment of the muon was analyzed in the framework of dispersion theory, providing a systematic formalism where all input quantities are expressed in terms of on-shell form factors and scattering amplitudes.

TL;DR: In this article, the authors analyzed string-theoretic large-field inflation in the regime of spontaneously-broken supergravity with conventional moduli stabilization by fluxes and non-perturbative effects.

TL;DR: The case of unbroken gauged baryon number B and lepton number L is studied in this paper, where the authors show that successful Big Bang nucleosynthesis provides strong bounds for masses 10 eV M Z ′ 10 GeV due to resonant enhancement of the rate f ¯ f ↔ ν ¯ R ν R.

TL;DR: In this article, the amplitude of primordial curvature perturbations is enhanced when a radiation bath at a temperature T > H is sustained during inflation by dissipative particle production, which is particularly significant when a non-trivial statistical ensemble of inflaton fluctuations is also maintained.

TL;DR: In this article, the authors presented an analysis on the total width of the recently discovered Higgs boson, Gamma[H], using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to a neutrino pair.

TL;DR: In this paper, a fully differential calculation of the NNLO QCD corrections to the t-channel mechanism for producing single top quarks at the LHC is presented.

TL;DR: In this paper, the authors study the viability of pseudo Nambu-Goldstone bosons arising in see-saw models as dark matter candidates and conclude that the simplest Majoron dark matter models coupling through the Higgs portal are excluded by current direct detection data for Majorons lighter than 225 GeV and future runnings are expected to rule out decisively the 1 GeV-1 TeV window.

TL;DR: In this paper, the one-loop anomalous dimension matrix for the dimension-six baryon number violating operators of the Standard Model effective field theory, including right-handed neutrino fields, was calculated.

TL;DR: The authors' models are shown to feature a natural mechanism for inflaton decay into predominantly Standard Model particles, which points towards trans-Planckian evolution of the inflaton.