Investigation of Λ+c- and Λb-Hypernuclei in Relativistic Mean-Field Model

摘要

We investigate the properties of Λc+- and Λb-hypernuclei within the framework of the relativistic mean-fieldmodel (RMF). It is found that no Λc+ bound states can exist if the Λc+ potential well depth |Uλc+| in nuclear matter isless than 10 MeV. If |Uλc+| is less than 20 MeV, Λc+ cannot bind to the heavier nuclei with atomic number larger than100. We suggest it is preferable to search the Λc+-hypernuclei from medium-heavy nuclear systems in experiment. Verysmall spin-orbit splitting for the Λc+ in hypernuclei is also observed, and for the Λb it is nearly zero.