Lepton Flavor Violation Processes In New Physics

As a clear signal of new physics beyond the Standard Model (SM), searching for Lepton Flavor Violating (LFV) processes have attracted a great deal of attention. The search for LFV has continued from the early1940’s, when the muon was identified as a separate particle, until today. The theoretical predictions on those LFV processes are suppressed by small masses of neutrinos in SM, and exceed the detecting extent of experiment. Nevertheless, various extensions of the SM have predicted enhanced branching ratios of LFV processes to be accessible in current experiments. Thus, searching for LFV processes are a powerful way to probe new physics.Considering the constraints μ�'eγ,μ�'3e,μ�'e conversion etc., we analyze the LFV decays φ(ρ,ω, J/ψ, γ(1S))�'eμ(μτ) in the scenarios of the minimal supersymmetric extensions of Standard Model (MSSM) and its extensions with seesaw Mechanism. Numeri-cally, there is parameter space that the LFV processes of J/ψ(γ)�'μτ can reach the upper experimental bounds, meanwhile the theoretical predictions on μ�'eγ,μ�'3e, μ�'e con-version satisfy the present experimental bounds. For searching of new physics, LFV processes J/ψ(γ)�'μτ may be more promising and effective channels.We investigate the LFV decays of vector mesons in the scenario of the unparticle physics by considering the constraint from μ�'e conversion. In unparticle physics, the predictions of LFV decays of vector mesons depend strongly on the scale dimension du. The prediction of LFV decay γ�'eμ can reach the detective sensitivity in experiment in region of3<du<4, while the prediction ofμ�'e conversion rate can meet the experimental upper limit.We analyze the LFV processes μ�'e conversion,li�'ljγ and li�'3lj in framework of inverse seesaw extended SM as a function of non-unitary parameter η=1-|Det(UPMNs)|-In range of10-17<η<10-5, the upper limits of CR(μ-e, Nucleus) and BR(μ�'eγ) can reach the sensitivity of experiment. In range of10-10<η<10-5, the upper limits of BR(τ�'e(μ)γ), BR(μ�'3e) and BR(τ�'3e(μ)) can also reach the sensitivity of experiment. The value of η depends on the determinant of the Majorana mass term Mμ. Searching for LFV processes in experiment provides us more opportunities for the searches of seesaw nature of the neutrino masses.Finally, searching for LFV processes would be an effective way for new physics.