Searching For New Physics Through Lepton Flavor Violation Process

The standard model has been successfully tested in the past decades, the precision measurements to date by which is consistent with the experimental data. However, it is a incomplete theory, for example, it cannot explain the reason why the neutrino is not massless, it is not the candidate of the dark matter and exit the problem that the hierarchy problem is caused by the Higgs mass correction. So we can extend the standard model and search for the new physics beyond the standard model.Recent discovery in neutrino oscillations suggests that neutrino masses are nonzero and provide the proof of the presence of the new physics. The existence of the neutrino mass makes that the Yukawa matrix is not diagonal, the lepton flavor violation can occur.In the paper we search for the charged lepton flavor violation in the following models. Firstly, we can investigate it in the standard model with the hand neutrino sterile neutrino. Secondly, we consider the contribution of non-universal gauge boson Z’ to the μ→3e process in this model, where the charged flavor changing neutral current can occur in the tree level. We can calculate the branching ratio of the μ→3e and get the constraints on the Z’ parameter. Thirdly, we analysis μ→3e and μ→e+γ in the TeVType Ⅱ seesaw model and μ→e+γ in the TeVType Ⅰ seesaw model. We know that neutrinos can get the masse by Type Ⅰ seesaw mechanism and Type Ⅱ seesaw can give neutrinos mass, the branching ratios are constrained by the mass of the new particles and the Yukawa couplings between the additional scalar and fermion and the standard model leptons which is depended on the neutrino oscillation measurements, we can get new bounds on the parameter, it is very important to search for the new physics.