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Nuclear Theory·nucl-th

Thursday·February 8, 2018

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 01

    [Submitted on 7 Feb 2018]

    Predictions for isobaric collisions at = 200 GeV from a multiphase transport model

    Wei-Tian Deng🇨🇳 · Xu-Guang Huang🇨🇳 · Guo-Liang Ma🇨🇳 · Gang Wang🇺🇸

    The isobaric collisions of Ru + Ru and Zr + Zr have recently been proposed to discern the charge separation signal of the chiral magnetic effect (CME). In this article, we employ the string melting version of a multiphase transport model to predict various charged-particle observables, including , spectra, elliptic flow (), and particularly possible CME signals in Ru + Ru and Zr + Zr collisions at = 200 GeV. Two sets of the nuclear structure parametrization have been explored, and the difference between the two isobaric collisions appears to be small, in terms of , spectra, and for charged particles. We mimic the CME by introducing an initial charge separation that is proportional to the magnetic field produced in the collision, and study how the final-state interactions affect the CME observables. The relative difference in the CME signal between the two isobaric collisions is found to be robust, insensitive to the final-state interactions.

    Comments:
    8 pages, 10 figures; final published version
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1802.02292 [pdf]
    PRC(2018)·41 citations
  2. 02

    [Submitted on 7 Feb 2018]

    Structure of even-even Cadmium isotopes from the beyond-mean-field interacting boson model

    K. Nomura · J. Jolie

    The structure of even-even Cd isotopes is investigated based on the self-consistent mean-field approach. By mapping the quadrupole- deformation energy surface, obtained from the constrained self-consistent mean-field calculations with a choice of the Skyrme force and pairing property, onto the Hamiltonian of the interacting boson model with configuration mixing, the strength parameters of the Hamiltonian are determined. The low-lying excitation spectra and electric quadrupole transition rates for the considered Cd nuclei are computed by the resultant Hamiltonian, and are compared in detail with the experimental data. Our semi-microscopic prediction identifies several intruder states as suggested empirically, and overall, provides a reasonable qualitative description of the experimental energy levels and transition rates.

    Comments:
    9 pages, 4 figures, 4 tables
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1802.02348 [pdf]
    PRC(2018)·33 citations
  3. 03

    [Submitted on 7 Feb 2018] (cross-list from hep-lat)

    Perturbative matching of continuum and lattice quasi-distributions

    Tomomi Ishikawa🇨🇳

    Matching of the quasi parton distribution functions between continuum and lattice is addressed using lattice perturbation theory specifically with Wilson-type fermions. The matching is done for nonlocal quark bilinear operators with a straight Wilson line in a spatial direction. We also investigate operator mixing in the renormalization and possible O(a) operators for the nonlocal operators based on a symmetry argument on lattice.

    Comments:
    8 pages, 2 figures, talk presented at the 35th International Symposium on Lattice Field Theory, 18-24 June 2017, Granada, Spain
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1802.02333 [pdf]
    EPJ Web Conf.(2018)·2 citations
  4. 04

    [Submitted on 7 Feb 2018] (cross-list from hep-ph)

    Viscous effects on the dynamical evolution of QCD matter during the first-order confinement phase transition in heavy-ion collisions

    Bohao Feng🇨🇳 · Carsten Greiner🇩🇪 · Shuzhe Shi🇺🇸 · Zhe Xu🇨🇳

    We investigate viscous effects on the dynamical evolution of QCD matter during the first-order phase transition, which may happen in heavy-ion collisions. We first obtain the first-order phase transition line in the QCD phase diagram under the Gibbs condition by using the MIT bag model and the hadron resonance gas model for the equation of state of partons and hadrons. The viscous pressure, which corresponds to the friction in the energy balance, is then derived from the energy and net baryon number conservation during the phase transition. We find that the viscous pressure relates to the thermodynamic change of the two-phase state and thus affects the timescale of the phase transition. Numerical results are presented for demonstrations.

    Comments:
    7 pages, 5 figures; title, some text and Figs. 1 and 2 are modified, typos fixed; published version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1802.02494 [pdf]
    PLB(2018)·10 citations

Affiliations

first authorsco-authorsvia INSPIRE