  We discuss the possibility to distinguish between Dirac and Majorana
neutrinos in the context of the minimal gauge theory for neutrino masses, the
B-L gauge extension of the Standard Model. We revisit the possibility to
observe lepton number violation at the Large Hadron Collider and point out the
importance of the decays of the new gauge boson to discriminate between the
existence of Dirac or Majorana neutrinos.
