String-inspired triplet seesaw mechanism from diagonal embedding of SU(2)L SU(2)A×SU(2)B

Paul Langacker, Brent D. Nelson

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Motivated by string constructions, we consider a variant on the Type II see-saw mechanism involving the exchange of triplet representations of SU(2)L in which this group arises from a diagonal embedding into SU(2)A×SU(2)B. A natural assignment of standard model lepton doublets to the two underlying gauge groups results in a bimaximal pattern of neutrino mixings and an inverted hierarchy in masses. Simple perturbations around this leading-order structure can accommodate the observed pattern of neutrino masses and mixings.

Original languageEnglish (US)
Article number053013
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - Sep 1 2005

All Science Journal Classification (ASJC) codes

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


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