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Nuclear Theory·nucl-th

Monday·April 15, 2019

5 papers—4 primary·1 cross-listed

All5Primary4Cross-lists1
  1. 01

    [Submitted on 11 Apr 2019]

    On relation between bulk, surface and curvature parts of nuclear binding energy within the model of hexagonal clusters

    V. V. Sagun · K. A. Bugaev · A. I. Ivanytskyi

    Using the model of hexagonal clusters we express the surface, curvature and Gauss curvature coefficients of the nuclear binding energy in terms of its bulk coefficient. Using the derived values of these coefficients and a single fitting parameter we are able to reasonably well describe the experimental binding energies of nuclei with more than 100 nucleons. To improve the description of lighter nuclei we introduce the same correction for all the coefficients. In this way we determine the apparent values of the surface, curvature and Gauss curvature coefficients which may be used for infinite nuclear matter equation of state. This simple model allows us to fix the temperature dependence of all these coefficients, if the temperature dependence for the bulk term is known. The found estimates for critical temperature are well consistent both with experimental and with theoretical findings.

    Comments:
    13 pages, 3 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1904.05955 [pdf]
    Phys.Part.Nucl.Lett.(2019)·3 citations
  2. 02

    [Submitted on 11 Apr 2019]

    Merging ab initio theory and few-body approach for reactions

    J. Rotureau · G. Potel · W. Li · F.M. Nunes

    A new framework for reactions is introduced by merging the microscopic approach to computing the properties of the nucleon-target systems and the three-body reaction formalism, thus providing a consistent link between the reaction cross sections and the underlying microscopic structure. In this first step toward a full microscopic description, we focus on the inclusion of the neutron-target microscopic properties. The properties of the neutron-target subsystem are encapsulated in the Green's function which is computed with the Coupled Cluster theory using a chiral nucleon-nucleon and three-nucleon interactions. Subsequently, this many-body information is introduced in the few-body Green's Function Transfer approach to reactions. Our benchmarks on stable targets Ca show an excellent agreement with the data. We then proceed to make specific predictions for on neutron rich Ca isotopes. These predictions are directly relevant to testing the new magic numbers and are expected to be feasible in the first campaign of the projected FRIB facility.

    Comments:
    10 pages, 4 figures, revised version. Accepted for publication in J. Phys. G
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1904.05978 [pdf]
    J.Phys.G(2020)·12 citations
  3. 03

    [Submitted on 12 Apr 2019]

    and its partners in a diquark model

    Pan-Pan Shi🇨🇳 · Fei Huang🇨🇳 · Wen-Ling Wang🇨🇳

    The purpose of the present study was to explore the possibility of accommodating the and its flavor SU(3) partners in a diquark model. Proposing that is composed of three vector diquarks, its mass is calculated by use of an effective Hamiltonian approach and its decay width is estimated by considering the effects of quark tunneling from one diquark to the others and the decays of the subsequent two-baryon bound state. Both the obtained mass and decay width of are in agreement with the experimental data, with the unexpected narrow decay width being naturally explained by the large tunneling suppression of a quark between a pair of diquarks. The masses and decay widths of the flavor SU(3) partners of are also predicated within the same diquark scenario.

    Comments:
    5 pages, 1 figure
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1904.06018 [pdf]
    EPJC(2019)·18 citations
  4. 04

    [Submitted on 12 Apr 2019]

    Equilibration dynamics and isospin effects in nuclear reactions

    A.S. Umar · C. Simenel · K. Godbey

    We discuss equilibration times and isospin effect for various quantities in low-energy heavy-ion reactions. These include equilibration of mass, isospin, and total kinetic energy (TKE) in quasifission and deep-inelastic reactions. The calculations are performed using the time-dependent Hartree-Fock theory. The influence of shell effects on the equilibration times are also discussed in the context of theoretical and experimental results.

    Comments:
    7 pages, 5 figures, proceedings of IWM-EC2018
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1904.06232 [pdf]
    Nuovo Cim.C(2019)·1 citation
  5. 05

    [Submitted on 12 Apr 2019] (cross-list from nucl-ex)

    Heavy flavour measurements with the ALICE experiment at the LHC

    Robert Vertesi (for the ALICE Collaboration)🇭🇺

    Heavy quarks (charm and beauty) are produced early in the nucleus-nucleus collisions, and heavy flavor survives throughout the later stages. Measurements of heavy-flavor quarks thus provide us with means to understand the properties of the Quark-Gluon Plasma, a hot and dense state of matter created in heavy-ion collisions. Production of heavy-flavor in small collision systems, on the other hand, can be used to test Quantum-chromodynamics models. After a successful completion of the Run-I data taking period, the increased luminosity from the LHC and an upgraded ALICE detector system in the Run-II data taking period allows for an unprecedented precision in the study of heavy quarks. In this article we give an overview of selected recent results on heavy-flavor measurements with ALICE experiment at the LHC.

    Comments:
    Submitted to the MDPI Universe special issue: The Zimányi School and Analytic Hydrodynamics in High Energy Physics. Proceedings of the 18th Zimanyi School Winter Workshop of Heavy Ion Physics
    Subjects:
    Nuclear Experiment (nucl-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1904.06180 [pdf]
    Universe(2019)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE