Showing papers in "Physics Letters B in 2006"

TL;DR: In this article, it was shown that the complexity of k t jet clustering can be reduced to two-dimensional nearest neighbor location for a dynamic set of points, which can then be performed in N ln N time.

TL;DR: In this paper, the authors investigated the behavior of a noncommutative radiating Schwarzschild black hole and showed that coordinate non-commutativity cures usual problems encountered in the description of the terminal phase of black hole evaporation.

TL;DR: In this paper, the transition temperature of QCD is determined by Symanzik improved gauge and stout-link improved staggered fermionic lattice simulations, using physical masses both for the light quarks (m u d ) and for the strange quark (m s ).

TL;DR: In this article, it was shown that f ( R ) -gravity can give rise to cosmological viable models compatible with a matter-dominated epoch evolving into a late accelerated phase.

TL;DR: In this article, a subgroup of the custodial symmetry O(3) that protects ρ from radiative corrections can also protect the ZbRR coupling, which allows one to build models of electroweak symmetry breaking, such as Higgsless, Little Higgs or 5D composite Higgs models, that are safe from corrections to Z → bb.

TL;DR: In this paper, it is shown that parity violation should manifest itself in the asymmetry between positive and negative pions with respect to the reaction plane, and a lower bound on the magnitude of the expected asymmetry is derived.

TL;DR: In this article, the authors show how to enlarge the νMSM to incorporate inflation and provide a common source for electroweak symmetry breaking and for right-handed neutrino masses.

TL;DR: In this article, an oscillating dark energy model is proposed to unify the early inflation and current acceleration of the universe, leading to the oscillations of the Hubble constant and a recurring universe.

TL;DR: In this article, the authors developed a unified phantom cosmology where the same scalar plays the role of early time (phantom) inflaton and late-time dark energy, and the recent transition from decelerating to accelerating phase is described too by the scalar field.

TL;DR: In this article, a new heterotic standard model with the spectrum of the minimal supersymmetric standard model (MSSM) with no exotic matter was introduced. But the model is obtained from a compactification of heterotic strings on a Calabi-Yau threefold with Z 2 fundamental group, coupled with an invariant SU ( 5 ) bundle.

TL;DR: In this paper, a hybrid approach which combines early ideal fluid dynamical evolution with late hadronic rescattering was used to demonstrate strong dissipative effects from the late rescattering stage on the elliptic flow coefficient v 2 ( η, b ) in Au + Au collisions at s = 200 A GeV as a function of pseudorapidity η and impact parameter b.

TL;DR: Cai et al. as discussed by the authors derived Friedmann equations for the FRW universe with any spatial curvature using the entropy formula for the static spherically symmetric black holes in Gauss-Bonnet gravity and Lovelock gravity.

TL;DR: In this article, the authors examined the Hawking radiation from a Schwarzschild black hole in several reference frames using the quasi-classical tunneling picture, and they showed that when one uses, Γ ∝ exp ( Im [ ∮ p d r ] ), rather than, ∆ ∆ exp ( 2 im [ ∫ p dr ] ), for the tunneling probability/decay rate one obtains twice the original Hawking temperature.

TL;DR: In this paper, the interacting holographic dark energy model in a universe with spatial curvature was examined and it was shown that the model can accommodate a transition of the dark energy from ωD > − 1 to ω D − 1.

TL;DR: In this paper, the authors employ the holographic model of interacting dark energy to obtain the equation of state for the energy density in non-flat (closed) universe enclosed by the event horizon measured from the sphere of horizon named L.

TL;DR: In this article, Pollock and Singh [M.D. Pollock, T.P. Singh, Class. 6 (1989) 901] explored the thermodynamics of dark energy taking into account the observer's event horizon in accelerated universes.

TL;DR: In this article, the authors show that the dark energy dynamics of the universe can be achieved by equivalent mathematical descriptions taking into account generalized fluid equations of state in General Relativity, scalar-tensor theories or modified F(R) gravity in Einstein or Jordan frames.

TL;DR: In this article, the authors consider the possibility that de Sitter and Minkowski vacua arise due to hidden sector matter interactions and find that the hierarchically small supersymmetry breaking scale can be explained by the scale of gaugino condensation.

TL;DR: In this article, Gomez-Ceballos et al. analyzed low-energy observables in the framework of the MSSM at large tan β and showed that for heavy squarks and A terms (M q ˜, A U ≳ 1 ǫTeV ) such scenario has several interesting virtues.

TL;DR: This review examines the variety of mechanisms that social insect species have evolved to regulate temperature and divides these mechanisms into two broad categories: active and passive.

TL;DR: In this paper, the Parikh-Wilczek tunnelling framework was extended and the emission rate of a charged particle tunnelled from the Kerr-Newman black hole was calculated.

TL;DR: In this article, the authors proposed to generalize the dark energy equation of state (EoS) by introducing the relaxation equation for pressure which is equivalent to consideration of the inhomogeneous EoS cosmic fluid which often appears as the effective model from strings/brane-worlds.

TL;DR: In this paper, the authors investigated a model of the interacting holographic dark energy with cold dark matter (CDM) and found two types of the effective equation of state (EoS) for a fixed ratio of two energy densities.

TL;DR: In this article, the transverse momentum spectra for identified charged pions, protons and anti-protons from p + p and d + Au collisions at s NN = 200 GeV were measured around midrapidity ( | y | 0.5 ) over the range of 0.3 p T 10 GeV / c with particle identification from the ionization energy loss and its relativistic rise in the time projection chamber and time-of-flight in STAR.

TL;DR: In this article, the cosmological moduli problem for relatively heavy moduli fields is investigated, and the decay of a modulus field at a quantitative level is examined, showing that the modulus dominantly decays into gauge bosons and gauginos, provided that couplings among them are not suppressed in the gauge kinetic function.

TL;DR: In this paper, the authors provided a parameter-free description of the suppression of the charmonium ground state J/ ψ in a quark-gluon plasma up to 1.5 T c or more, while the excited states χ c and ψ c are dissociated just above T c.

TL;DR: In this paper, the interaction between the heavy meson and the light pseudoscalar meson was studied in terms of the heavy chiral Lagrangian and the unitarized coupled-channel scattering amplitude.

TL;DR: In this article, the authors considered the bulk-brane interaction to obtain the equation of state for the holographic energy density in non-flat universe enclosed by the event horizon measured from the sphere of horizon named L.

TL;DR: In this article, Chandra measurements of the X-ray gas mass fraction of 26 rich clusters were used to perform constraints on the holographic dark energy model, and the results of a joint analysis of supernovae, cosmic microwave background, and large scale structure data.

TL;DR: In this paper, the authors explore the range of parameters for dark-matter sterile neutrinos in an extention of the Minimal Standard Model by three singlet fermions with masses below the electroweak scale (theMSM).