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Measurable neutrino mass scale in A4 × SU(5)

Measurable neutrino mass scale in A4 × SU(5)
Measurable neutrino mass scale in A4 × SU(5)
We propose a supersymmetric A4 × SU(5) model of quasidegenerate neutrinos which predicts the effective neutrino mass mee relevant for neutrinoless double beta decay to be proportional to the neutrino mass scale, thereby allowing its determination approximately independently of unknown Majorana phases. Such a natural quasidegeneracy is achieved by using A4 family symmetry (as an example of a non-Abelian family symmetry with real triplet representations) to enforce a contribution to the neutrino mass matrix proportional to the identity. Tribimaximal neutrino mixing as well as quark CP violation with α ≈ 90° and a leptonic CP phase δMNS ≈ 90° arise from the breaking of the A4 family symmetry by the vacuum expectation values of four “flavon” fields pointing in specific postulated directions in flavor space.
1550-7998
Antusch, S.
5c4a4555-199c-4b90-9590-f4c392ee850c
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Spinrath, M.
fb2c224d-2f7f-4b38-ad45-52cd14b10eb1
Antusch, S.
5c4a4555-199c-4b90-9590-f4c392ee850c
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Spinrath, M.
fb2c224d-2f7f-4b38-ad45-52cd14b10eb1

Antusch, S., King, Stephen F. and Spinrath, M. (2011) Measurable neutrino mass scale in A4 × SU(5). Physical Review D, 83 (1), [013005]. (doi:10.1103/PhysRevD.83.013005).

Record type: Article

Abstract

We propose a supersymmetric A4 × SU(5) model of quasidegenerate neutrinos which predicts the effective neutrino mass mee relevant for neutrinoless double beta decay to be proportional to the neutrino mass scale, thereby allowing its determination approximately independently of unknown Majorana phases. Such a natural quasidegeneracy is achieved by using A4 family symmetry (as an example of a non-Abelian family symmetry with real triplet representations) to enforce a contribution to the neutrino mass matrix proportional to the identity. Tribimaximal neutrino mixing as well as quark CP violation with α ≈ 90° and a leptonic CP phase δMNS ≈ 90° arise from the breaking of the A4 family symmetry by the vacuum expectation values of four “flavon” fields pointing in specific postulated directions in flavor space.

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Published date: 1 January 2011

Identifiers

Local EPrints ID: 179041
URI: http://eprints.soton.ac.uk/id/eprint/179041
ISSN: 1550-7998
PURE UUID: 81f6d88c-7a24-4e9b-b2fa-6b81cbfc47d0

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Date deposited: 18 Apr 2011 15:14
Last modified: 27 Jun 2022 17:00

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Contributors

Author: S. Antusch
Author: Stephen F. King
Author: M. Spinrath

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