Abstract
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.
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Branco, G.C., Rebelo, M.N. & Silva-Marcos, J.I. Leptonic invariants, neutrino mass-ordering and the octant of θ23. J. High Energ. Phys. 2017, 1 (2017). https://doi.org/10.1007/JHEP11(2017)001
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DOI: https://doi.org/10.1007/JHEP11(2017)001