Discrete flavour symmetries in light of T2K
| Autor: | Ferruccio Feruglio, Reinier de Adelhart Toorop, Claudia Hagedorn |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics 010308 nuclear & particles physics Group (mathematics) Dirac (video compression format) Flavour FOS: Physical sciences 01 natural sciences High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Homogeneous space Order (group theory) Neutrino Invariant (mathematics) 010306 general physics Lepton |
| Zdroj: | Physics Letters B. 703:447-451 |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/j.physletb.2011.08.013 |
| Popis: | We show that a non-vanishing angle theta_13 of order 0.1 can be predicted in the framework of discrete flavour symmetries. We assume that left-handed leptons transform as triplets under a group G_f which is broken in such a way that neutrino and charged lepton sectors remain invariant under the subgroups G_nu and G_e of G_f, respectively. In this limit mixing angles and the Dirac CP violating phase delta_CP are determined. By choosing G_f=Delta(6 n^2) (n=4,8), G_nu=Z_2 x Z_2 and G_e=Z_3 we find sin^2 theta_13=0.045(0.011) for n=4(8). At the same time theta_23 and theta_12 remain close to their experimental best fit values, particularly in the case n=8, where sin^2 theta_23 = 0.424 and sin^2 theta_12 = 0.337. delta_CP is predicted to be 0 or pi so that CP is conserved in our examples. 1+11 pages, 1 figure; v2: matches journal version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect