B${}_1$B${}_{s0}$K and B${}_1$B${}_{s1}$K strong couplings in three-point QCD sum rules

Abstract

An improved calculation of the strong coupling constants of B${}_1$B${}_{s0}$K and B${}_1$B${}_{s1}$K vertices is presented in the framework of the three-point QCD sum rules. The coupling constants are calculated, when both the B${}_{s0}$(B${}_{s1}$) and K states are off-shell. Considering the $S{U}_f(3)$ symmetry, the results are compared with the existing predictions.