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Probing δ_CP phase and Charged Lepton Flavour Violation with A_4 Flavor Symmetry and Deviations to Tri−Bi−Maximal mixing via z_2 ×z_2 invariant perturbation in the Neutrino sector.
by Gayatri Ghosh
Submission summary
| Authors (as registered SciPost users): | Gayatri Ghosh |
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| Preprint Link: | scipost_202111_00046v1 (pdf) |
| Date submitted: | 2021-11-23 15:54 |
| Submitted by: | Ghosh, Gayatri |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 16th International Workshop on Tau Lepton Physics (TAU2021) |
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| Academic field: | Physics |
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| Approach: | Phenomenological |
Abstract
In this work, a flavour theory of a neutrino mass model based on A_4 symmetry is considered to explain the phenomenology of CP violation phase and charged lepton flavour violation. The spontaneous symmetry breaking of A_4 symmetry in this model leads to tribimaximal mixing in the neutrino sector at a leading order. A z_2×z_2 invariant perturbations in this model is introduced in the neutrino sector which leads to testable predictions of θ_13 and CP violation. We consider an effective theory with an A_4 ×z_2 ×z_2 symmetry, which after spontaneous symmetry breaking at high scale which is much higher than the electroweak scale leads to charged lepton flavour violation processes once the heavy Majorana neutrino mass degeneracy is lifted either by renormalization group effects or by a soft breaking of the A_4 symmetry.