The hypernucleus is investigated by way of a folded-diagram method. The input G-matrix elements are calculated accurately from the Jülich- and the Nijmegen realistic hyperon-nucleon potentials with the Pauli exclusion operator properly treated in the finite hypernuclear system. The effect of hyperon-nucleon-nucleon three-body forces is included through the consideration of core polarization diagrams. Although our predicted energy spectrum of the hypernucleus is in good agreement with experiments in general, there are significant differences between the energy levels obtained from these two realistic potentials. A folded-diagram calculation for the single-particle energy has been performed. The spin-dependence parameters of Millener et al. calculated from the Jülich- and Nijmegen potentials are significantly different from each other, and the contribution from the three-body force to these parameters is important.
- Received 5 January 1998
- Revised 16 June 1999
- Published 30 August 1999
© 1999 The American Physical Society