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Nuclear Theory·nucl-th

Thursday·September 24, 2015

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 01

    [Submitted on 22 Sept 2015]

    Application of supersymmetric quantum mechanics to study bound state properties of exotic hypernuclei

    Md. Abdul Khan🇮🇳

    Bound state properties of few single and double- hypernuclei is critically examined in the framework of core- and core+ few-body model applying hyperspherical harmonics expansion method (HHEM). The potential is chosen phenomenologically while the core- potential is obtained by folding a phenomenological interaction into the density distribution of the core. The depth of the effective potential is adjusted to reproduce the experimental data for the core- subsystem. The three-body Schrödinger equation is solved by hyperspherical adiabatic approximation (HAA) to get the ground state energy and wave function. The ground state wavefunction is used to construct the supersymmetric partner potential following prescription of supersymmetric quantum mechanics (SSQM) algebra. The newly constructed supersymmetric partner potential is used to solve the three-body Schrödinger equation to get the energy and wavefunction for the first excited state of the original potential. The method is repeated to predict energy and wavefunction of the next higher excited states. The possible number of bound states is found to increase with the increase in mass of the core of the hypernuclei. The Root Mean Squared (RMS) matter radius and some other relevant geometrical observables are also predicted.

    Comments:
    20 Pages 10 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1509.06793 [pdf]
    0 citations
  2. 02

    [Submitted on 23 Sept 2015]

    Baryon stopping signal for mixed phase formation in HIC

    Yu. B. Ivanov🇷🇺

    It is argued that an irregularity in the baryon stopping is a natural consequence of onset of deconfinement occurring in the compression stage of a nuclear collision. It is an effect of the softest point inherent in an equation of state (EoS) with a deconfinement transition. In order to illustrate this effect, calculations within the three-fluid model were performed with three different EoS's: a purely hadronic EoS, an EoS with a first-order phase transition and that with a smooth crossover transition.

    Comments:
    4 pages, 2 figures, to be published in the Proceedings of the 15th International Conference on Strangeness in Quark Matter (SQM2015), 6-11 July 2015, JINR, Dubna, Russia
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1509.06944 [pdf]
    J.Phys.Conf.Ser.(2016)·5 citations
  3. 03

    [Submitted on 23 Sept 2015]

    Nuclear Axial Currents in Chiral Effective Field Theory

    A. Baroni🇺🇸 · L. Girlanda🇮🇹 · S. Pastore🇺🇸 · R. Schiavilla🇺🇸 · M. Viviani🇮🇹

    Two-nucleon axial charge and current operators are derived in chiral effective field theory up to one loop. The derivation is based on time-ordered perturbation theory, and accounts for cancellations between the contributions of irreducible diagrams and the contributions due to non-static corrections from energy denominators of reducible diagrams. Ultraviolet divergencies associated with the loop corrections are isolated in dimensional regularization. The resulting axial current is finite and conserved in the chiral limit, while the axial charge requires renormalization. A complete set of contact terms for the axial charge up to the relevant order in the power counting is constructed.

    Comments:
    53 pages, 14 figures an error relative to the d_i has been corrected and references added. 1 page erratum, corrections on Eqs(7.2), (D4), (D10), (D11), and (D12)
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1509.07039 [pdf]
    PRC(2016)·95 citations

Affiliations

first authorsco-authorsvia INSPIRE