Effects of lambda-sigma coupling in (lambda)h-4, (lambda)he-4, and (lambda)he-5

Abstract

We consider the effect on the binding energies of HeΛ4−HΛ4 of inclusion of admixing the Σ particle, based on a Λ−N potential derived from HeΛ5. This mixing explains the discrepancy in Coulomb energy of HeΛ4−HΛ4 and leads to a consistent set of potential parameters.