The European Physical Journal A (EPJ A)

Eur. Phys. J. A 36, 101-110 (2008)
DOI: 10.1140/epja/i2008-10542-5

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

H. Ðapo¹, B. -J. Schaefer² and J. Wambach^{1, 3}

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

haris@crunch.ikp.physik.tu-darmstadt.de
bernd-jochen.schaefer@uni-graz.at

(Received 19 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 $\ensuremath{V_{{\rm low} k}}$ . 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 $\ensuremath{V_{{\rm low} k}}$ 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.

PACS
21.65.-f - Nuclear matter.
13.75.Ev - Hyperon-nucleon interactions.
21.30.Fe - Forces in hadronic systems and effective interactions.

Correspondence: bernd-jochen.schaefer@uni-graz.at

Communicated by U.-G. Meißner