Probing lepton number violation via Majorana neutrinos at hadron supercolliders

The possibility of discovering heavy Majorana neutrinos and lepton number violation via the like-sign dilepton signal at hadron supercolliders is investigated. The cross sections for the production of these neutrinos singly as well as in pairs are computed both in three- and four-generation scenarios within the framework of the gauge group SU(2${)}_{\mathit{L}}$⊗U(1${)}_{\mathit{Y}}$ and the dominant processes are identified. The suppression of the standard model background by suitable kinematical cuts is also discussed.