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Neutrino mixing from the charged lepton sector with sequential right-handed lepton dominance

Neutrino mixing from the charged lepton sector with sequential right-handed lepton dominance
Neutrino mixing from the charged lepton sector with sequential right-handed lepton dominance
We systematically analyze the possibility that bi-large lepton mixing originates from the charged lepton sector in models with sequential dominance for the right-handed charged leptons. We derive analytical expressions for the mixing angles and CP phases of the MNS matrix for the case of zero mixing from the neutrino sector, which is arranged for with the help of sequential dominance for the right-handed neutrinos. For small ?13, the two large mixing angles ?12 and ?23 are determined by the Yukawa couplings to the dominant right-handed tau. The mixing angle ?13 is then governed by the subdominant right-handed muon Yukawa couplings. Naturally small ?13 and sequential right-handed lepton dominance can be realized in type I see-saw models and their type II upgrades via spontaneously broken SO(3) flavour symmetry and real vacuum alignment. We discuss the prediction for ?13 in this scenario and corrections to it including the dependence on the neutrino mass scale.
0370-2693
104-112
Antusch, S.
5c4a4555-199c-4b90-9590-f4c392ee850c
King, S.
f8c616b7-0336-4046-a943-700af83a1538
Antusch, S.
5c4a4555-199c-4b90-9590-f4c392ee850c
King, S.
f8c616b7-0336-4046-a943-700af83a1538

Antusch, S. and King, S. (2004) Neutrino mixing from the charged lepton sector with sequential right-handed lepton dominance. Physics Letters B, 591 (1-2), 104-112. (doi:10.1016/j.physletb.2004.04.021).

Record type: Article

Abstract

We systematically analyze the possibility that bi-large lepton mixing originates from the charged lepton sector in models with sequential dominance for the right-handed charged leptons. We derive analytical expressions for the mixing angles and CP phases of the MNS matrix for the case of zero mixing from the neutrino sector, which is arranged for with the help of sequential dominance for the right-handed neutrinos. For small ?13, the two large mixing angles ?12 and ?23 are determined by the Yukawa couplings to the dominant right-handed tau. The mixing angle ?13 is then governed by the subdominant right-handed muon Yukawa couplings. Naturally small ?13 and sequential right-handed lepton dominance can be realized in type I see-saw models and their type II upgrades via spontaneously broken SO(3) flavour symmetry and real vacuum alignment. We discuss the prediction for ?13 in this scenario and corrections to it including the dependence on the neutrino mass scale.

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Published date: 1 July 2004

Identifiers

Local EPrints ID: 56977
URI: http://eprints.soton.ac.uk/id/eprint/56977
ISSN: 0370-2693
PURE UUID: 404d113e-d841-406f-ada1-38665c655801

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Date deposited: 13 Aug 2008
Last modified: 15 Mar 2024 11:04

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Contributors

Author: S. Antusch
Author: S. King

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