  We show that within the Left-Right symmetric model, lepton number violating
decays of the Higgs boson can be discovered at the LHC. The process is due to
the mixing of the Higgs with the triplet that breaks parity. As a result, the
Higgs can act as a gateway to the origin of heavy Majorana neutrino mass. To
assess the LHC reach, a detailed collider study of the same-sign di-leptons
plus jets channel is provided. This process is complementary to the existing
nuclear and collider searches for lepton number violation and can probe the
scale of parity restoration even beyond other direct searches.

High Energy Physics - Phenomenology;High Energy Physics - Experiment