Back to Search
Start Over
Softly broken $\mu\leftrightarrow\tau$ symmetry in the minimal see-saw model
- Source :
- Phys.Rev.D77:113015,2008
- Publication Year :
- 2007
-
Abstract
- Neutrino oscillations data indicates that neutrino mixings are consistent with an apparent $\nu_\mu - \nu_\tau$ exchange symmetry in neutrino mass matrix. We observe that in the mininimally extended standard model with the see-saw mechanism, one can impose $\mu\leftrightarrow\tau$ 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 radiative corrections, small but predictable values for $\theta_{13}$, and for the deviation of $\theta_{ATM}$ from maximallity. 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.<br />Comment: Typos corrected. References and short discussions added. Final version, 6 pages, 2 figures
- Subjects :
- High Energy Physics - Phenomenology
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.D77:113015,2008
- Publication Type :
- Report
- Accession number :
- edsarx.0711.0045
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.77.113015