Neutrino masses in supersymmetric SU(3)C × SU(2) L × U(1)Y × U(1)′ models

Junhai Kang, Paul Langacker, Tianjun Li

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

We consider various possibilities for generating neutrino masses in supersymmetric models with an additional U(1)′ gauge symmetry. One class of models involves two extra U(1)′ × U(1)″ gauge symmetries, with U(1)″ breaking at an intermediate scale and yielding small Dirac masses through high-dimensional operators. The right-handed neutrinos N ic can naturally decouple from the low energy U(1)′, avoiding cosmological constraints. A variant version can generate large Majorana masses for Nic and an ordinary seesaw. We secondly consider models with a pair of heavy triplets which couple to left-handed neutrinos. After integrating out the heavy triplets, a small neutrino Majorana mass matrix can be generated by the induced nonrenormalizable terms. We also study models involving the double-seesaw mechanism, in which heavy Majorana masses for Nic are associated with the TeV-scale of U(1)′ breaking. We give the conditions to avoid runaway directions in such models and discuss simple patterns for neutrino masses.

Original languageEnglish (US)
Article number015012
Pages (from-to)015012-1-015012-12
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number1
DOIs
StatePublished - Jan 2005

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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