Top quark as a probe of heavy Majorana neutrino at the LHC and future colliders

Abstract

Right-handed (RH) Majorana neutrinos play a crucial role in understanding the origin of neutrino mass, the nature of dark matter and the mechanism of matter-antimatter asymmetry. In this work, we investigate the observability of heavy Majorana neutrino through the top quark neutrinoless double beta decay process $t\ensuremath{\rightarrow}b{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{+}jj$ at hadron colliders. By performing detector level simulation, we demonstrate that our method can give stronger limits on the light-heavy neutrino mixing parameters $|{V}_{eN,\ensuremath{\mu}N}|$ in the mass range of $15\text{ }\mathrm{GeV}<{m}_{N}<80\text{ }\text{ }\mathrm{GeV}$ than other existing collider bounds.