Relating leptogenesis parameters to light neutrino masses
Guy Engelhard; Yosef Nir; Yuval Grossman
Журнал:
Journal of High Energy Physics
Дата:
2007-07-01
Аннотация:
We obtain model independent relations among neutrino masses and leptogenesis parameters. We find exact relations that involve the CP asymmetries ε<sub>N<sub>α</sub></sub>, the washout parameters m̃<sub>α</sub> and θ<sub>αβ</sub>, and the neutrino masses m<sub>i</sub> and M<sub>α</sub>, as well as powerful inequalities that involve just m̃<sub>α</sub> and m<sub>i</sub>. We prove that the Yukawa interactions of at least two of the heavy singlet neutrinos are in the strong washout region (m̃<sub>α</sub> ≫ 10<sup>−3</sup> eV).
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