Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-09-25
Phys.Lett. B547 (2002) 252-256
Physics
High Energy Physics
High Energy Physics - Phenomenology
Final version to appear in Phys. Lett. B. References added and typos corrected
Scientific paper
10.1016/S0370-2693(02)02781-8
There are many models beyond the standard model predicting the existence of non-universal gauge bosons $Z^{\prime}$, which can give rise to very rich phenomena. We calculate the contributions of the non-universal gauge bosons $Z^{\prime}$, 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 $\tau\to l_{i}l_{j}l_{k}$. We find that the branching ratio $B_{r}(\tau\longrightarrow l_{i}l_{j}l_{k})$ is larger than that of the process $\tau\longrightarrow l_{i}\gamma$ 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.
Liu Lanjun
Yue Chongxing
Zhang Yanming
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