Structure of Cosmological CP Violation via Neutrino Seesaw

Details Structure of Cosmological CP Violation via Neutrino Seesaw Structure of Cosmological CP Violation via Neutrino Seesaw

2003-10-23

arxiv.org/abs/hep-ph/0310278v3

Phys.Lett.B583:173-185,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

9pp, Version in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2003.12.037

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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