PaperPanorama
FAQ

Nuclear Theory·nucl-th

Monday·June 5, 2023

11 papers—3 primary·8 cross-listed

All11Primary3Cross-lists8
  1. 01

    [Submitted on 2 Jun 2023]

    Self-consistent many-body approach to the electroproduction of hypernuclei

    P. Bydžovský🇨🇿 · D. Denisova🇨🇿 · D. Petrellis🇨🇿 · D. Skoupil🇨🇿 · P. Veselý🇨🇿 · G. De Gregorio🇮🇹 · F. Knapp🇨🇿 · N. Lo Iudice🇮🇹

    The electroproduction of selected - and -shell hypernuclei was studied within a many-body approach using realistic interactions between the constituent baryons. The cross sections were computed in distorted-wave impulse approximation using two elementary amplitudes for the electroproduction of the hyperon. The structure of the hypernuclei was investigated within the framework of the self-consistent -nucleon Tamm-Dancoff approach and its extension known as the -nucleon equation of motion phonon method. Use was made of the NNLOsat chiral potential plus the effective Nijmegen-F YN interaction. The method was first implemented on light nuclei for studying the available experimental data and establishing a relation to other approaches. After this proof test, it was adopted for predicting the electroproduction cross section of the hypernuclei K and K in view of the E12-15-008 experiment in preparation at JLab. On the ground of these predictions, appreciable effects on the spectra are expected to be induced by the YN interaction.

    Comments:
    10 pages, 7 figures (version 2); 11 pages, 9 figures (v1)
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2306.01308 [pdf]
    PRC(2023)·10 citations
  2. 02

    [Submitted on 2 Jun 2023]

    Properties of Hot Nuclear Matter

    Omar Benhar · Alessandro Lovato · Lucas Tonetto

    A fully quantitative description of equilibrium and dynamical properties of hot nuclear matter will be needed for the interpretation of the available and forthcoming astrophysical data, providing information on the post merger phase of a neutron star coalescence. We discuss the results of a recently developed theoretical model,based on a phenomenological nuclear Hamiltonian including two- and three-nucleon potentials, to study the temperature dependence of average and single-particle properties of nuclear matter relevant to astrophysical applications. The potential of the proposed approach for describing dissipative processes leading to the appearance of bulk viscosity in neutron star matter is also outlined.

    Comments:
    Submitted to Universe for publication in the Special Issue on Many-Body Theory. arXiv admin note: text overlap with arXiv:2208.03131, arXiv:2205.11183
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2306.01351 [pdf]
    Universe(2023)·7 citations
  3. 03

    [Submitted on 2 Jun 2023]

    Testing the Paradigm of Nuclear Many-Body Theory

    Omar Benhar

    Nuclear many-body theory is based on the tenet that nuclear systems can be accurately described as collections of point-like particles. This picture, while providing a remarkably accurate explanation of a wealth of measured properties of atomic nuclei, is bound to break down in the high-density regime, in which degrees of freedom other than protons and neutrons are expected to come into play. Valuable information on the validity of the description of dense nuclear matter in terms of nucleons, needed to firmly establish its limit of applicability, can be obtained from electron-nucleus scattering data at large momentum transfer and low energy transfer. The emergence of y-scaling in this kinematic region, unambiguously showing that the beam particles couple to high-momentum nucleons belonging to strongly correlated pairs, indicates that at densities as large as five times nuclear density -- typical of the neutron star interior -- nuclear matter largely behaves as a collection of nucleons.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2306.01367 [pdf]
    Particles(2023)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE