Non-universal gauge bosons $Z^{\mathrm{\prime }}$ and lepton flavor-violation tau decays

There are many models beyond the standard model predicting the existence of non-universal gauge bosons $Z^{\mathrm{\prime }}$, which can give rise to very rich phenomena. We calculate the contributions of the non-universal gauge bosons $Z^{\mathrm{\prime }}$, predicted by topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models, to the lepton flavor-violation tau decays $\tau\to l_{i}\gamma$and$\tau\to l_{i}l_{j}l_{k}$\mathrm{.}Wefindthatthebranchingratio$B_{r}(\tau\longrightarrow l_{i}l_{j}l_{k})$islargerthanthatoftheprocess$\tau\longrightarrow l_{i}\gamma$ in all of the parameter space. Over a sizable region of the parameter space, we have $B_{r}(\tau\longrightarrow l_{i}l_{j}l_{k})\sim 10^{-8}$, which may be detected in the future experiments.