The anomalous lepton magnetic moment, LFV decays and the fourth generation

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We investigate the lepton flavor violation (LFV) decays, τ→ lγ (l=μ, e) and μ→ eγ, and the newly observed muon g-2 anomaly in the framwork of a squential fourth generation model with a heavy fourth neutrino, ν'. By using the recent experimental bounds, we take the constraints of the 4× 4 leptonic mixing matrix element factors, |V₁ν' V₂ν'|², |V₁ν' V₃ν'|² and |V₃ν' V₂ν'|². We find that LFV decays and gμ-2 can exclude most of the parameter space of the 4th generation neutrino mass mν' and give stringent constraints on the existence of the fourth generation.