PaperPanorama
FAQ

Nuclear Theory·nucl-th

Wednesday·August 15, 2018

5 papers—2 primary·3 cross-listed

All5Primary2Cross-lists3
  1. 01

    [Submitted on 13 Aug 2018]

    In medium properties of and mesons under an external magnetic field

    R. M. Aguirre🇦🇷

    The one loop polarization insertions for the kaon and the mesons are evaluated in a hadronic medium as functions of the field intensity and the baryonic density. For this purpose an effective chiral model of the hadronic interaction is used, supplemented with a phenomenological interaction. The propagators of the charged particles include the full effect of the coupling to the magnetic field which induces the quantum Landau levels. Consequently, the vacuum diagrams are defined within a zeta function regularization scheme. The effective masses as well as the decay widths are introduced and examined as functions of matter density and the magnetic intensity.

    Comments:
    matches the published version
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1808.04404 [pdf]
    EPJA(2019)·17 citations
  2. 02

    [Submitted on 14 Aug 2018]

    Microscopic optical potentials for calcium isotopes

    J. Rotureau🇺🇸 · P. Danielewicz🇺🇸 · G. Hagen🇺🇸 · G. R. Jansen🇺🇸 · F. M. Nunes🇺🇸

    We construct nucleonic microscopic optical potentials by combining the Green's function approach with the coupled-cluster method for and . For the computation of the ground-state of and , we use the coupled-cluster method in the singles-and-doubles approximation, while for the A = nuclei we use particle-attached/removed equation-of-motion method truncated at two-particle-one-hole and one-particle-two-hole excitations, respectively. Our calculations are based on the chiral nucleon-nucleon and three-nucleon interaction , which reproduces the charge radii of Ca and Ca, and the chiral nucleon-nucleon interaction . In all cases considered here, we observe that the overall form of the neutron scattering cross section is reproduced for both interactions, but the imaginary part of the potential, which reflects the loss of flux in the elastic channel, is negligible. The latter points to neglected many-body correlations that would appear beyond the coupled-cluster truncation level considered in this work. We show that, by artificially increasing the parameter in the Green's function, practical results can be further improved.

    Comments:
    11 pages, 10 figures, typos corrected, accepted for publication in Phys. Rev. C
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1808.04535 [pdf]
    PRC(2018)·53 citations

Affiliations

first authorsco-authorsvia INSPIRE