$Λ^+_c$, $Σ_c$, $Ξ_c$ and $Λ_b$ hypernuclei in the quark-meson coupling model

Abstract

Charmed (and bottom) hypernuclei are studied in the quark-meson coupling (QMC) model. This completes systematic studies of charmed ($Λ_c^+, Σ_c, Ξ_c$), and $Λ_b$ hypernuclei in the QMC model. Effects of the Pauli blocking due to the underlying quark structure of baryons, and the $Σ_c N - Λ_c N$ channel coupling are phenomenologically taken into account at the hadronic level in the same way as those included for strange hypernuclei. Our results suggest that the $Σ_c^{++}$ and $Ξ_c^+$ hypernuclei are very unlikely to be formed, while the $Λ_c^+$, $Ξ_c^0$ and $Λ_b$ hypernuclei are quite likely to be formed. For the $Σ_c^+$ hypernuclei, the formation probability is non-zero though small. A detailed analysis is also made about the phenomenologically introduced Pauli blocking and channel coupling effects for the $Σ_c^0$ hypernuclei.