Abstract

BRACCO, M. E. et al. Coupling constants of D^*D_sK and D_s^*DK processes. Braz. J. Phys. [online]. 2007, vol.37, n.1a, pp. 59-62. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97332007000100019.

We calculate the coupling constants of D^*D_s K and D_s^*DK vertices using the QCD sum rules technique. We compare our results with results obtained in the limit of SU(4) symmetry and we found that the symmetry is broken at the order of 40%.

Keywords : Coupling constants; Form Factors; QCD Sum Rule.