Binding Energy of Λ Hypernuclei from Realistic Y N Interactions

s− and p−wave Λ single–particle energies are obtained for a variety of Λ hyper-nuclei from the relevant self–energy constructed within the framework of a pertur-bative many–body approach. Results are presented for present realistic hyperon– nucleon interactions such as Jülich B and Nijmegen SC models. Effects of the non–locality and energy–dependence of the self–energy on the bound states are investigated .