Eur. Phys. J. A (2008) 36: 101-110
https://doi.org/10.1140/epja/i2008-10542-5

Regular Article - Theoretical Physics

Hyperon-nucleon single-particle potentials with low-momentum interactions

¹ Institut für Kernphysik, TU Darmstadt, Schloßgartenstr. 9, D-64289, Darmstadt, Germany
² Institut für Physik, Karl-Franzens-Universität Graz, Universitätsplatz 5, A-8010, Graz, Austria
³ Gesellschaft für Schwerionenforschung mbH, Planckstr. 1, D-64291, Darmstadt, Germany

^* e-mail: bernd-jochen.schaefer@uni-graz.at

Received: 19 February 2008
Accepted: 24 February 2008
Published online: 2 April 2008

Abstract

Single-particle potentials in Hartree-Fock approximation for different hyperon-nucleon (YN channels are calculated in the framework of the effective low-momentum YN interaction . In contrast to the nucleon-nucleon interaction, the available experimental data for the YN interaction are scarce. As a consequence, no unique YN low-momentum potential can be predicted from the various bare potentials. The resulting momentum- and density-dependent single-particle potentials for several different bare OBE models and for chiral effective field theory are compared to each other.