Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-07
Phys.Rev.D71:115011,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
References added, some typos corrected. Version to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.71.115011
The presence of the top-pions $\pi_{t}^{0,\pm}$ in the low-energy spectrum is an inevitable feature of the topcolor scenario. Taking into account the constraints of the present experimental limit of the lepton flavor violating($LFV$) process $\mu\to e\gamma$ on the free parameters of topcolor-assisted techicolor(TC2) models, we study the contributions of the neutral top-pion $\pi^{0}_{t}$ to the $LFV$ processes $\mu^{+}\mu^{-}\to\tau \mu$ (or $\tau e$), $ \gamma \gamma\to\tau \mu$ (or $\tau e$), $e^{+} e^{-}\to\tau \mu $, and $e \gamma\to e \pi_{t}^{0}\to e \tau \mu(e)$ via the flavor changing ($FC$) couplings $\pi_{t}^{0}l_{i}l_{j}$ and discuss the possibility of searching for the $LFV$ signals via these processes in future lepton colliders.
Yang Shuo
Yue Chong-Xing
Zhou Li
Zong Zheng-Jun
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