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Nuclear Theory·nucl-th

Thursday·May 3, 2018

11 papers—3 primary·8 cross-listed

All11Primary3Cross-lists8
  1. 01

    [Submitted on 2 May 2018]

    Marchenko method with incomplete data and singular nucleon scattering

    Mahmut Elbistan · Pengming Zhang · Janos Balog

    We apply the Marchenko method of quantum inverse scattering to study nucleon scattering problems. Assuming a type repulsive core and comparing our results to the Reid93 phenomenological potential we estimate the constant , determining the singularity strength, in various spin/isospin channels. Instead of using Bargmann type S-matrices which allows only integer singularity strength, here we consider an analytical approach based on the incomplete data method, which is suitable for fractional singularity strengths as well.

    Comments:
    20 pages, 8 figures, published version
    Subjects:
    Nuclear Theory (nucl-th); Mathematical Physics (math-ph); math.MP (math.MP)
    arXiv:
    1805.00690 [pdf]
    PTEP(2019)·1 citation
  2. 02

    [Submitted on 16 Apr 2018]

    Net-charge fluctuation in Au+Au collisions at energies available at the Facility for Antiproton and Ion Research using the UrQMD model

    Somnath Ghosh🇮🇳 · Provash Mali🇮🇳 · Amitabha Mukhopadhyay🇮🇳

    We have studied the dynamical fluctuation of net-charge of hadrons produced in Au+Au collisions at energies that in near future will be available at the Facility for Antiproton and Ion Research (FAIR). Data simulated by a microscopic transport model based on ultra-relativistic quantum molecular dynamics are analyzed for the purpose. The centrality and pseudorapidity dependence of the net-charge fluctuation of hadrons are examined. Our simulated results are compared with the results available for nucleus-nucleus collision experiments held at similar energies. The gross features of our simulated results on net-charge fluctuations are found to be consistent with the experiment. At incident beam energy GeV the magnitude of net-charge fluctuation is very large, and in comparison with the rest its centrality dependence appears to be a little unusual. The effect of global charge conservation is expected to be very crucial at FAIR energies. The charge fluctuations measured with varying pesudorapidity window size depend on the collision centrality. The dependence is however exactly opposite in nature to that observed in the Pb+Pb collision at TeV.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1805.00790 [pdf]
    PRC(2017)·13 citations
  3. 03

    [Submitted on 2 May 2018]

    A short walk through the physics of neutron stars

    Isaac Vidana🇮🇹

    In this work we shortly review several aspects of the physics of neutron stars. After the introduction we present a brief historical overview of the idea of neutron stars as well as of the theoretical and observational developments that followed it from the mid 1930s to the present. Then, we review few aspects of their observation discussing, in particular, the different types of telescopes that are used, the many astrophysical manifestations of these objects, and several observables such as masses, radii or gravitational waves. Finally, we briefly summarize some of theoretical issues like their composition, structure equations, equation of state, and neutrino emission and cooling.

    Comments:
    Lecture given at the school "Rewriting Nuclear Physics Textbooks: Basic nuclear interactions and their applications to nuclear processes in the Cosmos and on Earth" held in Pisa during the last week of July 2017. To be published in the European Physical Journal Plus. 41 pages, 3 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1805.00837 [pdf]
    Eur.Phys.J.Plus(2018)·45 citations

Affiliations

first authorsco-authorsvia INSPIRE