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arXiv · hep-ph/0310278

Structure of Cosmological CP Violation via Neutrino Seesaw

V. Barger·Duane A. Dicus·Hong-Jian He·Tianjun Li
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Abstract

The cosmological matter-antimatter asymmetry can originate from CP-violating interactions of seesaw Majorana neutrinos via leptogenesis in the thermal phase of the early universe. Having the cosmological CP-phase for leptogenesis requires at least two right-handed Majorana neutrinos. Using only the low energy neutrino observables we quantitatively reconstruct a minimal neutrino seesaw. We establish a general criterion for minimal seesaw schemes in which the cosmological CP-phase is {\it completely} reconstructed from the low energy CP-phases measured by neutrino oscillation and neutrinoless double-beta decay experiments. We reveal and analyze two distinct classes of such minimal schemes that are shown to be highly predictive. Extension of our reconstruction formalism to a three-heavy-neutrino seesaw is discussed.

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V. Barger, Duane A. Dicus, Hong-Jian He, Tianjun Li. 2003-12-16. Structure of Cosmological CP Violation via Neutrino Seesaw. https://doi.org/10.1016/j.physletb.2003.12.037

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