Abstract
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 l . In the exact tri-bimaximal limit, ϵ l 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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