Lepton–Flavor Violating Processes li → liγ in Topcolor Assisted Technicolor Models**The project supported by National Natural Science Foundation of China (19905004), the Excellent Youth Foundation of Henan Scientific Committee (9911)

Abstract

We consider the lepton-flavor violating (LFV) processes li → liγ in the framework of topcolor-assisted technicolor (TC2) models. We find that the new gauge boson Z′ predicted by TC2 models can give significantly contributions to these processes via the flavor-changing couplings Z′lilj. The present experimental bound on the LFV process μ → eγ gives severe constraints on the TC2 models. Using other experimental constraints on the Z′ mass MZ, we obtain constraints on the lepton mixing factors Kτμ and Kτe. The future LFV experiments will probe into TC2 models.