Baryon-baryon interactions with strangeness studied from hypernuclei

摘要

Structure of hypernuclei provides valuable information on baryon-baryon interactions. We have studied the Lambda N spin- dependent interactions from precise level structure of p-shell A hypernuclei by means of a recently- developed technique of bypernuclear gamma-ray spectroscopy with the germanium detector array, Hyperball. The strengths of the spin-spin, spin-orbit. and tensor interactions have been experimentally determined from Li-7(Lambda), A Be-9(Lambda), and O-16(Lambda) hypernuclear level energies. Consistency check of the strength parameters has been also made with more p-shell hypernuclear data. Experimental results on double A hypernuclei and E hypernuclei have also provided information on Lambda Lambda and Sigma N interactions.