TeV-scale Type-II Seesaw Models and Possible Collider Signatures

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dc.creatorChao, Wei
dc.creatorLuo, Shu
dc.creatorXing, Zhi-zhong
dc.creatorZhou, Shun
dc.date2007-12-17
dc.date.accessioned2026-07-07T11:54:42Z
dc.date.available2026-07-07T11:54:42Z
dc.descriptionA natural extension of the standard model to accommodate massive neutrinos is to introduce one Higgs triplet and three right-handed Majorana neutrinos, leading to a 6 \times6 neutrino mass matrix. We show that three light Majorana neutrinos (i.e., the mass eigenstates of ν_e, ν_μand ν_τ) are exactly massless, if and only if M_L = M_D M^{-1}_R M^T_D exactly holds in this seesaw model. We propose three simple Type-II seesaw scenarios with broken A_4 \times U(1)_X flavor symmetry to interpret the observed neutrino mass spectrum and neutrino mixing pattern. Such a TeV-scale neutrino model can be tested in two complementary ways: (1) searching for possible collider signatures of lepton number violation induced by the right-handed Majorana neutrinos and doubly-charged Higgs particles; and (2) searching for possible consequences of unitarity violation of the 3\times 3 neutrino mixing matrix in the future long-baseline neutrino oscillation experiments.
dc.description4 pages. Talk given by Wei Chao at the 4th International Conference on Flavor Physics, 24-28 September 2007, Beijing (to appear in the proceedings)
dc.identifierhttps://arxiv.org/abs/0712.2612
dc.identifierhttp://arxiv.org/abs/0712.2612
dc.identifierInt.J.Mod.Phys.A23:3420-3424,2008
dc.identifierdoi:10.1142/S0217751X08042249
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204998
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTeV-scale Type-II Seesaw Models and Possible Collider Signatures
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