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Right-handed (RH) Majorana neutrinos play a crucial role in understanding theorigin of neutrino mass, the nature of dark matter and the mechanism ofmatter-antimatter asymmetry. In this work, we investigate the observability ofheavy Majorana neutrino through the top quark neutrinoless double beta decayprocess $t \to b \ell^+ \ell^+ j j$ at hadron colliders. By performing detectorlevel simulation, we demonstrate that our method can give stronger limits onthe light-heavy neutrino mixing parameters $|V_{eN, \mu N}|$ in the mass rangeof 15 GeV $< m_N <$ 80 GeV than other existing collider bounds.

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