Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-07-31
Phys.Lett. B624 (2005) 39-46
Physics
High Energy Physics
High Energy Physics - Phenomenology
latex files, 13 pages, 5 figures. References added and some typos corrected
Scientific paper
10.1016/j.physletb.2005.08.015
Due to the presence of extra top quark T in the little Higgs models, the $CKM$ matrix is not unitary and the flavor changing neutral currents may exist at the tree level. In the context of the Littlest Higgs(LH) model, we discuss the top-charm production at the high-energy linear $e^{+}e^{-}$ collider $(LC)$ via the processes $e^{+}e^{-}\to \bar{t}c +t\bar{c}$, $e^{+}e^{-}\to (\bar{t}c +t\bar{c})\nu_{e}\bar{\nu_{e}}$, and $e^{-}\gamma\to e^{-}\bar{t}c$. We find that the resonance production cross section for the process $e^{+}e^{-}\to \bar{t}c+ t\bar{c} $ is significantly larger, which can be detected in future $LC$ experiments.
Di Yi-Qun
Wang Lei
Yang Shuo
Yue Chong-Xing
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