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Enhancement of lepton flavor violation in a model with bi-maximal mixing at the grand unification scale

Shinya Kanemura·Koichi Matsuda·Toshihiko Ota·Tetsuo Shindou·Eiichi Takasugi·Koji Tsumura
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Abstract

We study phenomenological predictions in the scenario with the quasi-degenerate relation among neutrino Dirac masses, m_D1 simeq m_D2 < m_D3, assuming the bi-maximal mixing at the grand unification scale in supersymmetric standard models with right-handed neutrinos. A sufficient lepton number asymmetry can be produced for successful leptogenesis. The lepton flavor violating process mu to e gamma can be enhanced due to the Majorana phase, so that it can be detectable at forthcoming experiments. The processes tau to e gamma and tau to mu gamma are suppressed because of the structure of neutrino Dirac masses, and their branching ratios are smaller than that of mu to e gamma.

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Shinya Kanemura, Koichi Matsuda, Toshihiko Ota, Tetsuo Shindou, Eiichi Takasugi, Koji Tsumura. 2005-10-05. Enhancement of lepton flavor violation in a model with bi-maximal mixing at the grand unification scale. https://doi.org/10.1103/physrevd.72.093004

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