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arXiv · hep-ph/0610023

Connecting Leptogenesis to CP Violation in Neutrino Mixings in a Tri-bimaximal Mixing model

R. N. Mohapatra·Hai-Bo Yu
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Abstract

We show that in a recently proposed $S_3$ model for tri-bimaximal mixing pattern for neutrinos, CP violating phases in neutrino mixings are directly responsible for lepton asymmetry $ε_\ell$. In the exact tri-bimaximal limit, $ε_\ell$ is proportional to one of the Majorana phases whereas in the presence of small deviations from tri-bimaximal pattern, there are two contributions, one being proportional to the Dirac phase and the other to one of the two Majorana phases. In the second case, $θ_{13}$ is nonzero and correlated with the deviation from maximal atmospheric mixing.

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R. N. Mohapatra, Hai-Bo Yu. 2006-10-20. Connecting Leptogenesis to CP Violation in Neutrino Mixings in a Tri-bimaximal Mixing model. https://doi.org/10.1016/j.physletb.2006.12.005

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