An Electroweak Model With Massive Neutrinos

In this paper, an electroweak model with massive neutrinos is proposed. The symmetry of the model is $SU(2)_L \times U(1)_Y \times U(1)_M$. Because of the mixing of neutrinos, the conversion of one lepton type to another is possible, but many of those kind processes are of extremely small possibilities. The total lepton-number conservation still holds in this model, so neutrinoless double beta decay is prohibited. Though right-hand neutrinos are introduced into the model, their coupling with matter fields is extremely small and therefore they are much harder to be detected in experiments.