Reanalysis of the (0^+,1^+) states B_{s0} and B_{s1} with QCD sum rules

Abstract

In this article, we calculate the masses and decay constants of the $P$-wave strange-bottomed mesons $B_{s0}$ and $B_{s1}$ with the QCD sum rules, and observe that the central values of the masses of the $B_{s0}$ and $B_{s1}$ are smaller than the corresponding $BK$ and $B^{\ast }K$ thresholds respectively, the strong decays $B_{s0}\to BK$ and $B_{s1}\to B^{\ast }K$ are kinematically forbidden. They can decay through the isospin violation precesses $B_{s0}\to B_s\eta \to B_s{\pi }^0$ and $B_{s1}\to B_s^{\ast }\eta \to B_s^{\ast }{\pi }^0$. The bottomed mesons $B_{s0}$ and $B_{s1}$, just like their charmed cousins $D_{s0}(2317)$ and $D_{s1}(2460)$, maybe very narrow.

Comments: 9 pages, 5 figures, 4-version