Λ^* hypernuclei with chiral dynamics

As a strangeness S = −1 and baryon number B = 2 system, the two-body bound state of Λ^* = Λ(1405) and a nucleon is studied. To solve the Λ^* N system, we construct the Λ^* N potential by extending the Jülich model with couplings estimated in the chiral unitary approach. We have the Λ^* N quasi-bound state with the mass, M_Λ^*N ∼ 2364MeV which is shallowly bound about 9.5 MeV from the NN threshold. Decay width of the fall apart process, where the Λ^* N resonance decays to πΣN with a nucleon being as a spectator, is estimated to be Γ_F.A ∼ 49MeV.