SKYRME-HARTREE-FOCK TREATMENT OF LAMBDA-HYPERNUCLEI AND LAMBDA-LAMBDA-HYPERNUCLEI WITH G-MATRIX MOTIVATED INTERACTIONS

Skyrme-like hyperon-nucleon potentials are derived from G-matrix calcu lations and shown to reproduce well the Lambda single-particle spectra of hypernuclei measured at BNL and KER. previously known potentials a re reexamined systematically. The fit of the spectra can restrict the radii of Lambda orbits in hypernuclear ground states, Lambda well dept h and effective mass in nuclear matter, and polarization of nuclear co res caused by hyperon rather tightly. The implications of the Lambda N spin-orbit force to the spectra are considered. Hartree-Fock calculat ions of binding energies of B-13(Lambda Lambda) with density-dependent G-matrix Lambda Lambda potentials are presented, taking note of the c ore-rearrangement effects induced by Lambda N interactions.