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Nuclear Theory·nucl-th

Friday·July 5, 2019

3 papers—2 primary·1 cross-listed

All3Primary2Cross-lists1
  1. 01

    [Submitted on 4 Jul 2019]

    Statistical method in quark combination model

    Yang-guang Yang🇨🇳 · Jun Song🇨🇳 · Feng-lan Shao🇨🇳 · Zuo-tang Liang🇨🇳 · Qun Wang🇨🇳

    We present a new method of solving the probability distribution for baryons, antibaryons and mesons at the hadronization of constituent quark and antiquark system. The hadronization is governed by the quark combination rule in the quark combination model developed by the Shandong Group. We use the method of the generating function to derive the outcome of the quark combination rule, which is much simpler and easier to be generalized than the original method. Furthermore, we use the formula of the quark combination rule and its generalization to study the property of multiplicity distribution of net-protons. Taking a naive case of quark number fluctuations and correlations at hadronization, we calculate ratios of multiplicity cumulants of final-state net-protons and discuss the potential applicability of quark combination model in studying hadronic multiplicity fluctuations and the underlying phase transition property in relativistic heavy-ion collisions.

    Comments:
    17 pages, 3 figures. To be published in Chinese Physics C
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1907.02338 [pdf]
    CPC(2020)·2 citations
  2. 02

    [Submitted on 4 Jul 2019]

    Effective surface properties of light, heavy, and super-heavy nuclei

    Abdul Quddus🇮🇳 · M. Bhuyan🇲🇾 · S. K. Patra🇮🇳

    Starting from light to superheavy nuclei, we have calculated the effective surface properties such as the symmetry energy, neutron pressure, and symmetry energy curvature using the coherent density fluctuation model. The isotopic chains of O, Ca, Ni, Zr, Sn, Pb, and Z = 120 are considered in the present analysis, which cover nuclei over the whole nuclear chart. The matter density distributions of these nuclei along with the ground state bulk properties are calculated within the spherically symmetric effective field theory motivated relativistic mean field model by using the recently developed IOPB-I, FSUGarnet, and G3 parameter sets. The calculated results are compared with the predictions of the widely used NL3 parameter set and found in good agreement. We observe a few signatures of shell and/or sub-shell structure in the isotopic chains of nuclei. The present investigations are quite relevant for the synthesis of exotic nuclei with high isospin asymmetry including superheavy and also to constrain an equation of state of nuclear matter.

    Comments:
    23 pages, 7 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1907.02478 [pdf]
    J.Phys.G(2020)·16 citations

Affiliations

first authorsco-authorsvia INSPIRE