PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·September 1, 2022

11 papers—3 primary·8 cross-listed

All11Primary3Cross-lists8
  1. 01

    Equation of state and strangeness in neutron stars

    Wolfram Weise🇩🇪

    A brief survey is presented of our present understanding of the equation-of-state of cold, dense matter and the speed of sound in the interior of neutron stars, based on the constraints inferred from observational data. The second part focuses on strangeness in baryonic matter and the role of hyperon-nuclear two- and three-body forces, with reference to the "hyperon puzzle" in neutron stars and possible scenarios for its solution.

    nucl-thEPJ Web Conf.(2022)·3 citations
  2. 02

    Coupled fission fragment angular momenta

    Jorgen Randrup

    Nuclear fission produces fragments whose spins are coupled to the relative angular motion via angular momentum conservation. It is shown how ensembles of such spins can readily be obtained by either direct microcanonical sampling or by sampling of the associated normal modes of rotation. The resulting distribution of the spin-spin opening angle is illustrated in various three- and two- dimensional scenarios and it is demonstrated how recent mutually conflicting model calculations can be well reproduced with different assumptions about the scission geometry.

    nucl-thEPJ Web Conf.(2024)·16 citations
  3. 03

    First application of a microscopic absorption model in calculations of kaonic atoms

    J. Óbertová🇨🇿 · E. Friedman🇮🇱 · J. Mareš🇨🇿

    Strong interaction energy shifts and widths in kaonic atoms are calculated for the first time using microscopic + potentials derived from scattering amplitudes constructed within SU(3) chiral coupled-channels models of meson-baryon interactions. The in-medium modifications of the free-space amplitudes due to the Pauli correlations are taken into account. The potentials evaluated for 23 nuclear species are confronted with kaonic atoms data. The description of the data significantly improves when the absorption is included. To get as low as for the phenomenological multi-nucleon potential an additional phenomenological term, accounting for processes, is still needed. However, density dependence of this phenomenological term points out some deficiencies in the microscopic potentials and further improvements of the applied model are thus desirable. The calculated branching ratios for and absorption channels in the C atom are in reasonable agreement with the old bubble chamber data, as well as with the latest data from the AMADEUS Collaboration.

    nucl-thPRC(2022)·12 citations

Affiliations

first authorsco-authorsvia INSPIRE