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A new bridge between leptonic CP violation and leptogenesis

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arxiv hep-ph/0609297 v1 pith:ZLIQIUL5 submitted 2006-09-28 hep-ph

classification hep-ph
keywords leptogenesisneutrinoleptonicviolationasymmetrybridgehierarchicallow-energy
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Flavor effects due to lepton interactions in the early Universe may have played an important role in the generation of the cosmological baryon asymmetry through leptogenesis. If the only source of high-energy CP violation comes from the left-handed leptonic sector, then it is possible to establish a bridge between flavored leptogenesis and low-energy leptonic CP violation. We explore this connection taking into account our present knowledge about low-energy neutrino parameters and the matter-antimatter asymmetry observed in the Universe. In this framework, we find that leptogenesis favors a hierarchical light neutrino mass spectrum, while for quasi-degenerate and inverted hierarchical neutrino masses there is a very narrow allowed window. The absolute neutrino mass scale turns out to be m < 0.1 eV.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dirac-Phase CP-Violation in the Low-Scale Type-I Seesaw with Three Right-Handed Neutrinos

    hep-ph 2026-05 unverdicted novelty 7.0 of 10

    Restricting CP violation in the low-scale type-I seesaw with three right-handed neutrinos to the Dirac phase δ alone yields specific testable subregions of heavy-neutrino flavor mixings and permits low-scale leptogene...

  2. Insights on the Scale of Leptogenesis from Neutrino Masses and Neutrinoless Double-Beta Decay

    hep-ph 2025-02 conditional novelty 5.0 of 10

    In hierarchical seesaw leptogenesis, the required lightest heavy-neutrino mass sits between about 10^8 and 10^10 GeV for typical fine-tuning and can fall to 10^6 GeV with strong fine-tuning, as a function of the light...

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