Softly broken {mu}{r_reversible}{tau} symmetry in the minimal seesaw model

Journal Article · Sun Jun 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.113015· OSTI ID:21205060

Gomez-Izquierdo, Juan Carlos; Perez-Lorenzana, Abdel ^[1]

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1. Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados del I.P.N. Apdo. Post. 14-740, 07000, Mexico, D.F. (Mexico)

Neutrino oscillations data indicates that neutrino mixings are consistent with an apparent {nu}{sub {mu}}-{nu}{sub {tau}} exchange symmetry in neutrino mass matrix. We observe that in the minimally extended standard model with the seesaw mechanism, one can impose {mu}{r_reversible}{tau} symmetry at the tree level on all Lagrangian terms, but for the mass difference among {mu} and {tau} leptons. In the absence of any new extra physics, this mass difference becomes the only source for the breaking of such a symmetry, which induces, via quantum corrections, small but predictable values for {theta}{sub 13}, and for the deviation of {theta}{sub ATM} from maximality. In the CP conserving case, the predictions only depend on neutrino mass hierarchy and may provide a unique way to test for new physics with neutrino experiments.

• OSTI ID: 21205060
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
FORECASTING
LAGRANGIAN FUNCTION
MASS
MASS DIFFERENCE
MATRICES
MIXING
MUON NEUTRINOS
NEUTRINO OSCILLATION
STANDARD MODEL
SYMMETRY
SYMMETRY BREAKING
TAU NEUTRINOS
TAU PARTICLES