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Probing CP Violation in Neutrino-antineutrino Oscillations with Non-unitary Flavor Mixing

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arxiv 2209.02521 v2 pith:CRM2OV35 submitted 2022-09-06 hep-ph

Probing CP Violation in Neutrino-antineutrino Oscillations with Non-unitary Flavor Mixing

classification hep-ph
keywords mixingneutrino-antineutrinonon-unitaryoscillationsviolationflavorleptonicmajorana
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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If massive neutrinos are Majorana particles, then the lepton number should be violated and neutrino-antineutrino oscillations will take place. In this talk, we present the properties of CP violation in neutrino-antineutrino oscillations with a non-unitary leptonic flavor mixing matrix, which naturally arises in the type-I seesaw model due to the mixing between light and heavy Majorana neutrinos. Taking into account current experimental bounds on the leptonic unitarity violation, we show that the CP asymmetries induced by the non-unitary mixing parameters can significantly deviate from those in the unitarity limit.

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