Type-III seesaw mechanism at CERN LHC
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology2008Vol. 78(3)
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Abstract
Neutrino masses can be generated by fermion triplets with TeV-scale mass, that would manifest at LHC as production of two leptons together with two heavy standard model (SM) vectors or Higgs, giving rise to final states such as $2\ensuremath{\ell}+4j$ (that can violate lepton number and/or lepton flavor) or $\ensuremath{\ell}+4j+{\mathrm{E\ensuremath{\llap{\not\;}}}}_{T}$. We devise cuts to suppress the SM backgrounds to these signatures. Furthermore, for most of the mass range suggested by neutrino data, triplet decays are detectably displaced from the production point, allowing to infer the neutrino mass parameters. We compare with LHC signals of type-I and type-II seesaw.
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