Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${Ξ_b}$ and ${Ω_b}$ supported by hadron spectroscopy

Abstract

In this work, we calculate the branching ratios of the color-allowed two-body nonleptonic decays of the bottom baryons, which include the $Ξ_b\to Ξ_c^{(*)}$ and $Ω_b\to Ω_c^{(*)}$ weak transitions by emitting a pseudoscalar meson ($π^{-}$, $K^{-}$, $D^{-}$, and $D_s^{-}$) or a vector meson ($ρ^{-}$, $K^{*-}$, $D^{*-}$, and $D_s^{*-}$). For achieving this aim, we adopt the three-body light-front quark model with the support of hadron spectroscopy, where the spatial wave functions of these heavy baryons involved in these weak decays are obtained by a semirelativistic potential model associated with the Gaussian expansion method. Our results show that these decays with the $π^-$, $ρ^-$, and $D_s^{(*)-}$-emitted mode have considerable widths, which could be accessible at the ongoing LHCb and Belle II experiments.