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Hyperon properties in finite nuclei using realistic YN interactions

Authors: I. Vidaña, A. Polls, A. Ramos & M. Hjorth-Jensen

Ref.: Nucl. Phys. A 644, 201 (1998)

Abstract: Single-particle energies of Λ and Σ hyperons in several nuclei are obtained from the relevant self-energies. The latter are constructed within the framework of a perturbative many-body approach employing present realistic hyperon-nucleon interactions such as the models of the Jülich and Nijmegen groups. The effects of the non-locality and energy dependence of the self-energy on the bound states are investigated. It is also shown that, although the single-particle hyperon energies are well reproduced by local Woods-Saxon hyperon-nucleus potentials, the wave functions from the non-local self-energy are far more extended. Implications of this behavior for the mesonic weak decay of Λ hypernuclei are discussed.

DOI: 10.1016/S0375-9474(98)00599-5