Coupling Constant $g_{\Lambda_{b}B_{s}\Lambda}$ using the Baryonic $\bar{B}^{0}_{s}\rightarrow p\bar{\Lambda} K^{-}$ Decay

TL;DR

This paper estimates the coupling constant $g_{ ext{Lambda}_b B_s ext{Lambda}}$ using the decay $ar{B}_s^0 o p ar{ ext{Lambda}} K^-$ within a pole model, matching experimental data from LHCb.

Contribution

The paper provides a novel determination of the strong coupling constant $g_{ ext{Lambda}_b B_s ext{Lambda}}$ using baryonic B decay data within a pole model framework.

Findings

The calculated branching ratio aligns with LHCb measurements when $g_{ ext{Lambda}_b B_s ext{Lambda}}=10.49 o 12.06$.

The study supports the validity of the pole model in describing baryonic B decays.

The estimated coupling constant offers insights into baryon interactions in heavy meson decays.

Abstract

We study the three-body baryonic B decay $\bar{B}^{0}_{s}\rightarrow p\bar{\Lambda} K^{-}$ within the framework of the pole model via the baryonic $\Lambda_{b}$ pole. In our calculation, we require the strong coupling constant $g_{\Lambda_{b}B_{s}\Lambda}$ and investigate if $g_{\Lambda_{b}B_{s}\Lambda}=10.49\pm1.57$ is adopted, the branching ratio agrees with the experimental result, reported by the LHCb collaboration.