Leptonic invariants, neutrino mass-ordering and the octant of θ23
We point out that leptonic weak-basis invariants are an important tool for the study of the properties of lepton flavour models. In particular, we show that appropriately chosen invariants can give a clear indication of whether a particular lepton flavour model favours normal or inverted hierarchy for neutrino masses and what is the octant of θ23. These invariants can be evaluated in any conveniently chosen weak-basis and can also be expressed in terms of neutrino masses, charged lepton masses, mixing angles and CP violation phases.
KeywordsBeyond Standard Model Neutrino Physics
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- Particle Data Group collaboration, C. Patrignani et al., Review of Particle Physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
- P. Minkowski, μ → eγ at a Rate of One Out of 109 Muon Decays?, Phys. Lett. B 67 (1977) 421 [INSPIRE].
- S.L. Glashow, The Future of Elementary Particle Physics, in Quarks And Leptons. Proceedings, Summer Institute, Cargese, France, 9–29 July 1979, M. Levy, J.L. Basdevant, D. Speiser, J. Weyers, R. Gastmans and M. Jacob eds., pp. 687–713 [NATO Sci. Ser. B 61 (1980) 1]Google Scholar