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Nuclear Theory·nucl-th

Friday·November 4, 2022

13 papers—3 primary·10 cross-listed

All13Primary3Cross-lists10
  1. 01

    [Submitted on 3 Nov 2022]

    Study on Bound State and Resonance

    Thiri Yadanar Htun🇹🇭 · Yupeng Yan🇹🇭

    We perform the ab initio no-core shell model (NCSM) calculation to investigate the bound state problem of the three-body system in chiral next-to-next-to-leading-order NN and chiral leading-order YN interactions. The calculations show that no bound state exists, but predict a low-lying resonant state near the threshold with the energy of MeV and the width of about MeV. In searching for resonances, we extend the NCSM calculation to the continuum state by employing the J-matrix formalism in the scattering theory with the hyperspherical oscillator basis.

    Comments:
    4 figures, 5 pages
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2211.01693 [pdf]
    PRC(2022)·3 citations
  2. 02

    [Submitted on 3 Nov 2022]

    Electron and neutrino scattering off the deuteron in a relativistic framework

    A. Grassi🇵🇱 · J. Golak🇵🇱 · W. N. Polyzou🇺🇸 · R. Skibiński🇵🇱 · H. Witała🇵🇱 · H. Kamada🇯🇵

    We build a relativistic model to perform calculations of exclusive, semi-exclusive and inclusive unpolarized cross sections and various polarization observables in electron and neutrino scattering experiments with deuteron targets. The strong interaction dynamics is defined by an explicit dynamical unitary representation of the Poincaré group, where representations of space translations and rotations in the interacting and non-interacting representations are the same. The Argonne V18 potential is used to construct a relativistic nucleon-nucleon interaction reproducing the experimental deuteron binding energy and nucleon-nucleon scattering observables. Our formalism does not include the pion production channel and neglects two-body contributions in the electromagnetic as well as in the weak nuclear current operator. We show that it is applicable to processes at kinematics, where the internal two-nucleon energy remains below the pion production threshold but the magnitude of the three-momentum transfer extends at least to several GeV.

    Comments:
    59 pages, 29 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2211.01748 [pdf]
    PRC(2023)·4 citations
  3. 03

    [Submitted on 3 Nov 2022]

    Microscopic Description of Isoscalar Giant Monopole Resonance in Ca

    N.N. Arsenyev · A.P. Severyukhin

    The properties of the isoscalar giant monopole resonance (ISGMR) for the double magic Ca are analyzed in the framework of a microscopic model based on Skyrme-type interactions. A method for simultaneously taking into account the coupling between one-, two-, and three-phonon terms in the wave functions of states has been developed. The inclusion of three-phonon configurations leads to a substantial redistribution of the ISGMR strength to lower energy states and also higher energy tail. Our results demonstrate that the developed approach enables to us to describe a gross structure of the ISGMR spreading width.

    Comments:
    13 pages, 1 figure, accepted for publication in Physics of Atomic Nuclei
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2211.01878 [pdf]
    Phys.Atom.Nucl.(2022)·4 citations

Affiliations

first authorsco-authorsvia INSPIRE