Neutrino masses in a 331 model with right-handed neutrinos without doubly charged Higgs bosons via inverse and double seesaw mechanisms

Jun, 2012
19 pages
Published in:
  • Phys.Rev.D 86 (2012) 073015
e-Print:

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Abstract: (arXiv)
We discuss a 331 model with three scalar triplets and neutral fermion singlets. We show that in the 331 model with right-handed neutrinos, it is possible to obtain small active neutrino masses via the double and inverse seesaw mechanisms, without the use of scalar sextets or triplets with doubly-charged Higgs. Two types of models are discussed. If we have a large Majorana mass matrix for the singlets, the spectrum of neutrinos presents light, heavy and very heavy masses. The other possibility is a small (zero) Majorana mass matrix, which leads to pseudo-Dirac (Dirac) heavy neutrinos in the TeV scale, in addition to the active light neutrinos
  • 14.60.St
  • 12.60.-i
  • neutrino: mass
  • mass: Majorana
  • neutrino: right-handed
  • neutrino: heavy
  • symmetry: SU(3) x SU(3) x U(1)
  • Higgs particle: charged particle
  • charge: 2
  • triplet: scalar