Neutral top-pion and lepton flavor violating processes

In the context of topcolor-assisted techicolor(TC2) models, we study the contributions of the neutral top-pion π t to the lepton flavor violating(LFV) processes li → ljγ and li → lj lkll. We find that the present experimental bound on μ → eγ gives severe constraints on the free parameters of TC2 models. Taking into account these constraints, we consider the processes li → lj lkll generated by top-pion exchange at the tree-level and the one loop level, and obtain Br(μ → 3e) ≃ 2.87×10, 1.1×10 ≤ Br(τ → 3e) ≃ Br(τ → 2eμ) ≤ 4.4×10, 3.1 × 10 ≤ Br(τ → 2μe) ≃ Br(τ → 3μ) ≤ 1.5 × 10 in most of the parameter space. PACS number(s):12.60.Cn, 13.35.Dx, 14.80.Mz, 14.80.Cp ∗E-mail:[email protected]