Non-Unitary Lepton Mixing Matrix, Leptogenesis and Low Energy CP Violation

Abstract

It is well-known that for unflavored leptogenesis there is in general no connection between low and high energy CP violation. We stress that for a non-unitary lepton mixing matrix this may not be the case. We give an illustrative example for this connection and show that the non-standard CP phases that are induced by non-unitarity can be responsible for observable effects in neutrino oscillation experiments as well as for the generation of the baryon asymmetry of the Universe. Lepton Flavor Violation in decays such as tau -> mu gamma can also be induced at an observable level. We also comment on neutrino mass limits from leptogenesis, which get barely modified in case of a non-unitary mixing matrix.

14 pages, 3 figures. Discussion on lepton flavor violation and neutrino mass constraints added. To appear in EPL

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Cited by in corpus (14)

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• Renormalization group running of neutrino parameters in the inverse seesaw model
• On Non-Unitary Lepton Mixing and Neutrino Mass Observables
• Bridging resonant leptogenesis and low-energy CP violation with an RGE-modified seesaw relation
• A direct link between unflavored leptogenesis and low-energy CP violation via the one-loop quantum corrections
• Neutrino mixing, interval matrices and singular values
• Octant Degeneracy, Quadrant of leptonic CPV phase at Long Baseline Neutrino Experiments and Baryogenesis
• Non-Unitarity at DUNE and T2HK with Charged and Neutral Current Measurements
• Non-unitarity of the leptonic mixing matrix in the TeV-scale type-I seesaw model
• Leptogenesis and eV scale sterile neutrino
• New physics at nuSTORM
• Effects Of leptonic non-unitarity on lepton flavor violation, neutrino oscillation, leptogenesis and lightest neutrino mass
• Significance of broken $\mu -\tau$ Symmetry in correlating ${\delta }_{CP}$, ${\theta }_{13}$, Lightest neutrino Mass and neutrinoless double beta decay $0\nu \beta \beta$