2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39817The two-particle hadronic decays of B_c meson into S-wave and P-wave charmonium states X_cc are considered in the framework of hard gluon exchange model. It is shown that decay width of B_c meson into S-wave charmonium states doubly exceeds one for S-wave states. In compare with the previous estimations we predict the enhancement by 8 % the branching ratio for the B_c decays into J/psi in the two-particle hadronic decays via the contribution of the radiative decays of P-wave states in the cascade processes.LaTeX2e, 6 pages plus 1 figure using linedraw.sty. Talk was presented at V International Workshop on Heavy Quark Physics, Dubna, Russia, April 6 - 8, 2000High Energy Physics - Phenomenologytext