Lepton-Flavor Violating Processes $l_i\to l_j\gamma$ in Topcolor Assisted Technicolor Models

Abstract

We consider the lepton-flavor violating(LFV) processes $l_i\to l_j\gamma$ in the framework of topcolor assisted technicolor(TC2) models. We find that the new gauge boson $Z^{\prime }$ predicted by TC2 models can give significantly contributions to these processes via the flavor changing couplings. The present experimental bound on the LFV process $\mu \to e\gamma$ gives severe constraints on the TC2 models. In the case that the $Z^{\prime }$ mass $M_Z$ is consistent with other experimental constraints, we obtain constraints on the lepton mixing factors $K_{\tau \mu }$ and $K_{\tau e}$. The future LFV experiments will be probe of the TC2 models.

Comments: some mistakes corrected and several references added