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

Abstract

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 the symmetry is broken on the order of 40%.

Comments: 4 pages, 3 ps figures. Talk presented in the 18 Workshop on Hadron Interactions, IFUSP, Sao Paulo, Brazil, may 22-24 of 2006