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arXiv · 1011.3199

An A_5 Model of Four Lepton Generations

Chian-Shu Chen·Thomas W. Kephart·Tzu-Chiang Yuan
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Abstract

We study the lepton sector of a four generations model based on the discrete flavor group $A_5$ (the even permutation of five objects). The best features of the three family $A_4$ model survive, including the tribimaximal pattern of three generation neutrino mixings. At leading order the three light neutrino mass relations of $m_{ν_1} = m_{ν_3}$ and $m_{ν_2} = 0$ are predicted. The splitting of the neutrino masses can be naturally obtained as a result of the breaking of $A_{5}$ down to $A_4$ and a degenerate spectrum is preferred in our model. In our $A_5$ model, the electron mass is zero at tree level, but calculable through quantum corrections.

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Chian-Shu Chen, Thomas W. Kephart, Tzu-Chiang Yuan. 2011-03-23. An A_5 Model of Four Lepton Generations. https://doi.org/10.1007/jhep04(2011)015

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