Nucleon-Nucleon Tensor Force Effect on the -Separation Energy B in s-Shell Hypernuclei

Abstract

The realistic N-N interaction including a strong tensor force component gives rise to a sizable rearrangement effect on the Λ-separation energy BΛ. The effect is shown to be more than twice larger for 5ΛHe than for 4ΛHe (4ΛH) and their difference is found to amount to ∼1 MeV which is considerably larger than other effects so far examined. This is able to resolve a half of the overbinding difficulty encountered in previous calculations.