Hypernuclear Properties Derived from G-Matrix Interactions

G-matrix calculations are performed systematically with the various OBE models, and discuss the specific differences among them. It is demonstrated that the spin-dependent features of the G-matrices can be seen in the contributions to U_Λ from the spin-independent, spin-spin, LS and tensor components of the G-matrices, and the various OBE models are discriminated characteristically. On the basis of the local density approximation, the structure calculations for ⁸⁹_Λ Y are done with use of the G-matrix interactions. The Λ effective mass is extracted by adjusting the calculated energy levels so as to reproduce the recent experimental data precisely.