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

Paul Langacker; Brent D. Nelson

doi:10.1103/PhysRevD.72.053013

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

Paul Langacker, Brent D. Nelson

Physics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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 language	English (US)
Article number	053013
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	72
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.72.053013
State	Published - Sep 1 2005

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.72.053013

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abstract = "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.",

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AB - 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.

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

Abstract

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