2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41491Theoretical computations on the decays of $B_c$ meson to $P$-wave charmonium $χ_c$ or $h_c$ with some particle(s) else and on the decays of $B_c$ meson to leptons with gluon bremsstrahlung, and the results as well are outlined.4 pages, latex, A talk presented in XXXVIIth Rencontres de Moriond on QCD and High Energy Hadronic InteractionsHigh Energy Physics - PhenomenologyThe decays of $B_c$ meson to P-wave charmonium $χ_c(h_c)$ and to leptons with gluon bremsstrahlungtext