Neutrino Masses and TeV-scale Particles Testable at the LHC

Abstract

We consider a scenario in which TeV-scale particles belonging to weak-isospin multiplets higher than triplets lead to novel seesaw mechanisms different from conventional type I, II and III seesaw models. Besides an appealing testability of these mechanisms at the LHC, the model with Majorana quintuplets with imposed discrete symmetry may provide viable dark matter candidate.

Comments: 11 pages, 5 figures, Talk at Symposium held at the Croatian Academy of Sciences and Arts