Strong BBP couplings for the charmed baryons

According to the Coleman-Glashow null theorem if all the symmetry breaking effects belong to the same regular representation (octet in the case of SU( 3) and 15 in the case of SU(4)) and are generated in a tadpole type mechani sm, the strangeness changing (charm changing) weak transitions generated th rough the S-6 (S-9) tadpole must vanish. Exploiting this null result, relat ions between the BBP coupling constants are obtained, which leads to the co upling constants in terms of two parameters and baryon masses, Fixing these two parameters (g(NN pi) and g(Lambda Sigma pi)) from experiments, the rem aining coupling constants are estimated.