PaperPanorama
FAQ

Nuclear Theory·nucl-th

Monday·March 16, 2015

6 papers—2 primary·4 cross-listed

All6Primary2Cross-lists4
  1. 01

    [Submitted on 13 Mar 2015]

    Odd-even mass staggering with Skyrme-Hartree-Fock-Bogoliubov theory

    W. J. Chen · C. A. Bertulani · F. R. Xu · Y. N. Zhang

    We have studied odd-even nuclear mass staggering with the Skyrme-Hartree-Fock-Bogoliubov theory by employing isoscalar and isovector contact pairing interactions. By reproducing the empirical odd-even mass differences of the Sn isotopic chain, the strengths of pairing interactions are determined. The optimal strengths adjusted in this work can give better description of odd-even mass differences than that fitted by reproducing the experimental neutron pairing gap of Sn.

    Comments:
    9 pages, 3 figures, submitted to PRC Brief Report
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1503.03994 [pdf]
    PRC(2015)·11 citations
  2. 02

    [Submitted on 13 Mar 2015]

    Bose-Einstein condensation of pions in heavy-ion collisions at the CERN Large Hadron Collider (LHC) energies

    Viktor Begun🇵🇱 · Wojciech Florkowski🇵🇱

    We analyse in detail the possibility of Bose-Einstein condensation of pions produced in heavy-ion collisions at the beam energy = 2.76 TeV. Our approach is based on the chemical non-equilibrium thermal model of hadron production which has been generalised to include separately the contribution from the local zero-momentum state. In order to study both the hadronic multiplicities and the transverse-momentum spectra, we use the Cracow freeze-out model which parameterises the flow and space-time geometry of the system at freeze-out in a very economic way. Our analysis indicates that about 5% of all pions may form the Bose-Einstein condensate.

    Comments:
    The comparison with the equilibrium model is added to the section where we discuss pion spectra
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1503.04040 [pdf]
    PRC(2015)·70 citations
  3. 03

    [Submitted on 12 Mar 2015] (cross-list from hep-lat)

    Nucleon-pion-state contribution to nucleon two-point correlation functions

    Oliver Bar🇩🇪

    We study the nucleon-pion-state contribution to the QCD two-point function of the standard nucleon interpolating fields. For sufficiently small quark masses these two-particle states are expected to have a smaller total energy than the single-particle excited states. We calculate the nucleon-pion-state contribution to leading order in chiral perturbation theory. Both parity channels are considered. We find the nucleon-pion-state contribution to be small, contributing at the few percent level to the effective mass in the positive parity channel.

    Comments:
    17 pages, 2 figures. Revised version: minor changes in some sections, appendix added, references added, typos corrected, results unchanged. Matches published version
    Subjects:
    High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    1503.03649 [pdf]
    PRD(2015)·46 citations
  4. 04

    [Submitted on 12 Mar 2015] (cross-list from hep-ph)

    Anisotropic particle production and azimuthal correlations in high-energy pA collisions

    Adrian Dumitru🇺🇸 · Andre V. Giannini🇺🇸 · Vladimir Skokov🇺🇸

    We summarize some recent ideas relating to anisotropic particle production in high-energy collisions. Anisotropic gluon distributions lead to anisotropies of the single-particle azimuthal distribution and hence to disconnected contributions to multi-particle cumulants. When these dominate, the four-particle elliptic anisotropy changes sign. On the other hand, connected diagrams for -particle cumulants are found to quickly saturate with increasing , a ``coherence'' quite unlike conventional ``non-flow'' contributions such as decays. Finally, we perform a first exploratory phenomenological analysis in order to estimate the amplitude of the anisotropy of the gluon distribution at small , and we provide a qualitative prediction for the elliptic asymmetry from three-particle correlations, .

    Comments:
    Combined write-up of the presentations by the authors at the Initial Stages 2014 Conference, Napa, 3-7 December 2014
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1503.03897 [pdf]
    18 citations
  5. 05

    [Submitted on 13 Mar 2015] (cross-list from hep-ph)

    Introduction to Hydrodynamics

    Sangyong Jeon🇨🇦 · Ulrich Heinz🇺🇸

    We give a pedagogical review of relativistic hydrodynamics relevant to relativistic heavy ion collisions. Topics discussed include linear response theory derivation of 2nd order viscous hydrodynamics including the Kubo formulas, kinetic theory derivation of 2nd order viscous hydrodynamics, anisotropic hydrodynamics and a brief review of numerical algorithms. Emphasis is given to the theory of hydrodynamics rather than phenomenology.

    Comments:
    Typos are corrected and some references are added. To be included in QGP 5 edited by Xin-Nian Wang
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1503.03931 [pdf]
    IJMPE(2015)·256 citations
  6. 06

    [Submitted on 13 Mar 2015] (cross-list from astro-ph.HE)

    Quark-Hadron Phase Transition with Finite-Size Effects in Neutron Stars

    N. Yasutake🇯🇵 · S. Benic🇭🇷 · D. Blaschke🇷🇺 · T. Maruyama🇯🇵 · T. Tatsumi🇯🇵

    We study the quark-hadron phase transition with the finite-size effects in neutron stars. The finite-size effects should be, generally, taken into account in the phase transition of multi-component system. The behavior of the phase transition, however, strongly depends on the models for quark and hadron matter, surface tension, neutrino fraction, and temperature. We find that, if the surface tension is strong, the EOS becomes similar to the case of a Maxwell construction for any hadron and/or quark model, though we adopt the Gibbs conditions. We also find that the mass-radius relations for that EOS are consistent with the observations, and our model is then applicable to realistic astrophysical phenomena such as the thermal evolution of compact stars.

    Comments:
    3 pages, 1 figure. Proceeding of "Quarks and Compact Stars 2014 Beijing"
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    1503.03933 [pdf]
    Acta Astron.Sin.Suppl.(2015)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE