$B^{\ast }{B}^{\ast }\rho$ vertex from QCD sum rules

Abstract

The form factors and the coupling constants in the $B^{\ast }{B}^{\ast }\rho$ vertex are evaluated in the framework of three-point QCD sum rules. The correlation functions responsible for the form factors are evaluated considering contributions of both $B^{\ast }$ and $\rho$ mesons as off-shell states. The obtained numerical results for the coupling constants are in agreement with light-cone QCD sum rules calculations.

Comments: 18 pages, 11 figures, to appear on Phys. Lett. B