$g_{D_s^{\ast }D{K}^{\ast }(892)}$ and $g_{B_s^{\ast }B{K}^{\ast }(892)}$ coupling constants in QCD sum rules

Abstract

The coupling constants $g_{D_s^{\ast }D{K}^{\ast }(892)}$ and $g_{B_s^{\ast }B{K}^{\ast }(892)}$ are calculated in the framework of three-point QCD sum rules. The correlation functions responsible for these coupling constants are evaluated considering contributions of both $D(B)$ and $K^{\ast }(892)$ mesons as off-shell states, but in the absence of radiative corrections. The results, $g_{D_s^{\ast }D{K}^{\ast }(892)}=(4.31\pm 1.42)Ge{V}^{-1}$ and $g_{B_s^{\ast }B{K}^{\ast }(892)}=(3.24\pm 1.08)Ge{V}^{-1}$ are obtained for the considered strong coupling constants.

13 Pages and 11 Figures