Regular Article - Theoretical Physics
Dirac CP phases in a 3 + 1 neutrino scenario with symmetry
Departamento de Física, Centro de Investigación y de Estudios Avanzados del I.P.N., Apdo. Post. 14-740, 07000, Mexico City, Mexico
Accepted: 25 October 2021
Published online: 8 November 2021
A sterile neutrino in the scheme, where the sterile accounts for neutrino anomalies not explained solely by the weak active neutrinos, arises as a natural source for the breaking of the symmetry suggested by oscillation neutrino data. We explore the predictions for the Dirac CP phases in this scenario, with and without sterile neutrino decay, and show that current limits on suggest a normal hierarchy and a lightest neutrino scale below 0.1 eV as the most plausible explanation for that, when Majorana phases are null. Other Dirac phases turn out to be non zero as well.
© The Author(s) 2021
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