Relating leptogenesis parameters to light neutrino masses

Abstract

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 (${\tilde{m}}_{\alpha }\gg 10^{-3}eV$).

5 pages, 1 figure

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• Nonzero ${\theta }_{13}$ and Leptogenesis in a Type-I See-saw Model with $A_4$ Symmetry
• Predictive Leptogenesis from Minimal Lepton Flavour Violation
• Probing CP violation at LBNE with reactor experiments
• Nuclear Effects and CP Sensitivity at DUNE
• Monstrous entanglement
• Influence of cross-sectional uncertainty on sensitivity studies of DUNE and T2HK experiments