Relating leptogenesis parameters to light neutrino masses

Details Relating leptogenesis parameters to light neutrino masses Relating leptogenesis parameters to light neutrino masses

2007-02-15

arxiv.org/abs/hep-ph/0702151v1

JHEP 0707:029,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure

Scientific paper

10.1088/1126-6708/2007/07/029

We obtain model independent relations among neutrino masses and leptogenesis parameters. We find exact relations that involve the CP asymmetries $\epsilon_{N_\alpha}$, the washout parameters $\tilde m_\alpha$ and $\theta_{\alpha\beta}$, and the neutrino masses $m_i$ and $M_\alpha$, as well as powerful inequalities that involve just $\tilde m_\alpha$ and $m_i$. We prove that the Yukawa interactions of at least two of the heavy singlet neutrinos are in the strong washout region ($\tilde m_\alpha\gg10^{-3} eV$).

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