Particle Mixing and Charge Asymmetric $\Lambda N$ Forces

Abstract

We calculate the contributions of a particular set of charge asymmetric $\Lambda N$ interactions to the difference of the separation energies of ${}_{\Lambda }^4$He and ${}_{\Lambda }^4$H. We use perturbation theory with four-body variational Monte Carlo wave functions calculated from a Hamiltonian with two- and three-hadron forces. We compare with the data and with an earlier calculation made by one of us which employed a two-body wave function of the $\Lambda$-nucleus type.

6 pages, uses sprocl style file, contributed to Mesons and Light Nuclei 98, Prague-Pruhonice, Czech Republic, August 31-Sept 4, 1998, proceedings to be published by World Scientific