Bs1(5830)andBs2*(5840)

Abstract

In this paper we investigate the strong decays of the two newly observed bottom-strange mesons ${B}_{s1}(5830)$ and ${B}_{s2}^{*}(5840)$ in the framework of the quark pair creation model. The two-body strong decay widths of ${B}_{s1}(5830{)}^{0}\ensuremath{\rightarrow}{B}^{*+}{K}^{\ensuremath{-}}$ and ${B}_{s2}^{*}(5840{)}^{0}\ensuremath{\rightarrow}{B}^{+}{K}^{\ensuremath{-}}$, ${B}^{*+}{K}^{\ensuremath{-}}$ are calculated by considering ${B}_{s1}(5830)$ to be a mixture between $|^{1}P_{1}⟩$ and $|^{3}P_{1}⟩$ states, and ${B}_{s2}^{*}(5840)$ to be a $|^{3}P_{2}⟩$ state. The double pion decay of ${B}_{s1}(5830)$ and ${B}_{s2}^{*}(5840)$ is supposed to occur via the intermediate state $\ensuremath{\sigma}$ and ${f}_{0}(980)$. Although the double pion decay widths of ${B}_{s1}(5830)$ and ${B}_{s2}^{*}(5840)$ are smaller than the two-body strong decay widths of ${B}_{s1}(5830)$ and ${B}_{s2}^{*}(5840)$, one suggests future experiments to search the double pion decays of ${B}_{s1}(5830)$ and ${B}_{s2}^{*}(5840)$ due to their sizable decay widths.