Investigation of Λ_c~+- and Λ_b-Hypernuclei in Relativistic Mean-Field Model

摘要

We investigate the properties of Λ_c~+- and Λ_b-hypcrnuclei within the framework of the relativistic mean-field model (RMF). It is found that no Λ_c~+ bound states can exist if the Λ_c~+ potential well depth |U_(Λ_c~+)| in nuclear matter is less than 10 MeV. If |U_(Λ_c~+)| is less than 20 MeV, Λ_c~+ cannot hind to the heavier nuclei with atomic number larger than 100, We suggest it is preferable to search the Λ_c~+-hypernuclei from medium-heavy nuclear systems in experiment. Very small spin-orbit splitting for the Λ_c~+ in hypernuclei is also observed, and for the Λ_b it is nearly zero.