Lepton flavor violation decays with the fourth generation neutrino

Abstract

We investigate the lepton flavor violation decays, $τ\to μγ$, $τ\to eγ$ and $μ\to eγ$, in the framwork of a squential fourth generation model with a heavy fourth neutrino, $ν'$. Using the recent experimental bounds, we can obtain the constraints of the $4\times 4$ leptonic mixing matrix element factors, $V_{1ν'},V_{2ν'}$ and $V_{3ν'}$. We find that LFV decays can give strigent costraints on the parameter space of the 4th neutrino mass $m_{ν'}$.