In this paper, we study the lepton number violation processes of $B_c$ meson induced by possible doubly-charged scalars. Both the three-body decay channels and the four-body decay channels are considered. For the former, $Br\times\left(\frac{ s_\Delta h_{ ij}}{ M_\Delta^2}\right)^{ -2}$ is of the order of $10^{ -7}\sim 10^{ -9}$, and for the later channels, $Br\times\left(\frac{ s_\Delta h_{ ij}}{ M_\Delta^2}\right)^{ -2}$ is of the order of $10^{ -12}\sim 10^{ -20}$, where $s_\Delta$, $h_{ ij}$, $M_\Delta$ are the constants related to the doubly-charged boson.
Categories: hep-ph