Coupling constants of $D^{\ast }{D}_{s}K$ and $D_s^{\ast }DK$ processes

M. E. Bracco, A. Lozea, A. Cerqueira +2

We calculate the coupling constants of $D^{\ast }{D}_{s}K$ and $D_s^{\ast }DK$ vertices using the QCD sum rules technique. We compare results obtained in the limit of SU(4) symmetry and found that…