6533b7d4fe1ef96bd1261f5d
RESEARCH PRODUCT
Nonunitary neutrino mixing in short and long-baseline experiments
D. V. ForeroCarlo GiuntiM. TortolaC. A. Ternessubject
PhysicsParticle physicsPhysics::Instrumentation and DetectorsDirac (video compression format)Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyPontecorvo–Maki–Nakagawa–Sakata matrixFOS: Physical sciencesContext (language use)Unitary stateHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Seesaw molecular geometryHigh Energy Physics::ExperimentNeutrinoNeutrino oscillationMixing (physics)description
Non-unitary neutrino mixing in the light neutrino sector is a direct consequence of type-I seesaw neutrino mass models. In these models, light neutrino mixing is described by a sub-matrix of the full lepton mixing matrix and, then, it is not unitary in general. In consequence, neutrino oscillations are characterized by additional parameters, including new sources of CP violation. Here we perform a combined analysis of short and long-baseline neutrino oscillation data in this extended mixing scenario. We did not find a significant deviation from unitary mixing, and the complementary data sets have been used to constrain the non-unitarity parameters. We have also found that the T2K and NOvA tension in the determination of the Dirac CP-phase is not alleviated in the context of non-unitary neutrino mixing.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-10-21 |