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

Lepton flavor violating processes such as μ⃗3e and μ⃗eγ are investigated with a supersymmetric Higgs triplet pair Δ and Δ̅ in light of neutrino masses and experimentally verifiable leptogenesis. The Higgs triplet mass M_Δ is expected to be in the range of 1–100TeV. The branching ratios of these charged lepton decays are evaluated in terms of M_Δ and the coupling fLΔL of the Higgs triplet Δ with lepton doublet pairs LL, which is proportional to the neutrino mass matrix. They may be reached in future collider experiments. In particular, the μ⃗3e decay would be observed indicating the existence of Higgs triplets with M_Δ∼1–100TeV for |f|∼0.1–1, while the μ⃗eγ decay can be significant irrespective of M_Δ in the supersymmetric model due to the flavor violation in the slepton mass matrices induced by the renormalization effects.