Lepton flavor violation with supersymmetric Higgs triplets in TeV region for neutrino masses and leptogenesis

Abstract

Lepton flavor violating processes such as μ→ 3e and μ→ e γare investigated with supersymmetric Higgs triplet pair Δand Δin the light of neutrino masses and experimentally verifiable leptogenesis. The Higgs triplet mass M_Δis expected to be in the range of 1 - 100 TeV. The branching ratios of these charged lepton decays are evaluated in terms of M_Δand the coupling f L ΔL of Higgs triplet Δwith lepton doublet pairs L L, which is proportional to the neutrino mass matrix. They may be reached in the future collider experiments. In particular, the μ→ 3e decay would be observed indicating the existence of Higgs triplets with M_Δ∼ 1 - 100 TeV for | f | ∼ 0.1 - 1, while the μ→ e γdecay can be significant irrespective of M_Δin the supersymmetric model due to the flavor violation in the slepton mass matrices induced by the renormalization effects.