Ab initio approach to s-shell hypernuclei 3HLambda, 4HLambda, 4HeLambda and 5HeLambda with a Lambda N-Sigma N interaction
H. Nemura, Y. Akaishi, Y. Suzuki
Abstract
Variational calculations for s-shell hypernuclei are performed by explicitly including Σ degrees of freedom. Four sets of YN interactions (SC97d(S), SC97e(S), SC97f(S) and SC89(S)) are used. The bound-state solution of Λ5He is obtained and a large energy expectation value of the tensor ΛN-ΣN transition part is found. The internal energy of the 4He subsystem is strongly affected by the presence of a Λ particle with the strong tensor ΛN-ΣN transition potential.
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