Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-11-19
Phys.Lett. B611 (2005) 223-230
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 3 figures, 2 tables, will be published Physics Letters, B
Scientific paper
10.1016/j.physletb.2005.02.051
The lighter chargino pair production ($e^+e^- \to \tilde{\chi}^{+}_{1} \tilde{\chi}^{-}_{1}$) is one of key processes for determination of supersymmetric parameters at a linear collider. If $\tan\beta$ is a large value, the lighter stau ($\tilde{\tau}^{\pm}_{1}$) might be lighter than the $\tilde{\chi}^{\pm}_{1}$, while the other sleptons stay heavier. This case leads a cascade decay, $\tilde{\chi}^{\pm}_{1} \to \tilde{\tau}^{\pm}_{1} \nu_{\tau}$ followed by $\tilde{\tau}^{\pm}_{1} \to \tilde{\chi}^{0}_{1} \tau^{\pm}$, where $\tilde{\chi}^{0}_{1}$ is the lightest supersymmetric particle. This paper addresses to what extent this cascade decay may affect the measurements of the chargino mass and its production cross section.
Fujii Keisuke
Kamon Teruki
Kato Yukihiro
Khotilovich Vadim
Nojiri Mihoko M.
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