Neutrino Masses and Interactions in a Model with Nambu-Goldstone Bosons

Details Neutrino Masses and Interactions in a Model with Nambu-Goldstone Bosons Neutrino Masses and Interactions in a Model with Nambu-Goldstone Bosons

2006-11-06

arxiv.org/abs/hep-ph/0611059v2

AIPConf.Proc.881:108-117,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk presented at the Second International Conference on High Energy Physics (CICHEP II), January 14-17, 2006, Cairo,

Scientific paper

10.1063/1.2435285

A natural scenario for the generation of neutrino masses is the see-saw mechanism, in which a large right-handed neutrino mass makes the left-handed neutrinos light. We review a special case when the Majorana masses originate from spontaneous breaking of a global U(1)XU(1) symmetry. The interactions of the right-handed with the left-handed neutrinos at the electorweak scale further break the global symmetry giving mass to one pseudo Nambu-Goldstone boson (pNGB). The pNGB can then generate a long-range force. Leptogenesis occurs through decays of heavy neutrinos into the light ones and Higgs particles. The pNGB can become the acceleron field and the neutrino masses vary with the value of the scalar field. The talk is a brief preview of the results in reference [11].

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