Coupling Constant $g_{{\mathrm{\Lambda }}_b{B}_s\mathrm{\Lambda }}$ using the Baryonic ${\bar{B}}_s^0\to p\bar{\mathrm{\Lambda }}{K}^{-}$ Decay

We study the three-body baryonic B decay ${\bar{B}}_s^0\to p\bar{\mathrm{\Lambda }}{K}^{-}$ within the framework of the pole model via the baryonic ${\mathrm{\Lambda }}_b$ pole. In our calculation, we require the strong coupling constant $g_{{\mathrm{\Lambda }}_b{B}_s\mathrm{\Lambda }}$ and investigate if $g_{{\mathrm{\Lambda }}_b{B}_s\mathrm{\Lambda }}=10.49\pm 1.57$ is adopted, the branching ratio agrees with the experimental result, reported by the LHCb collaboration.