Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-09-22
Phys.Rev. D61 (2000) 033008
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTex, 33 pages, 8 Eps figuers
Scientific paper
10.1103/PhysRevD.61.033008
We studied the one-loop contributions of the gaugino-Higgsino-sector to the process of top-pair production via $\gamma \gamma$ fusion at NLC in frame of the Minimal Supersymmetric Model(MSSM). We find that the corrections to $\gamma \gamma \to t\bar{t}$ and $e^+ e^- \to \gamma \gamma \to t\bar{t}$ are found to be significant and can approach to a few percent and one percent, respectively. Furthermore, the dependences of the corrections on the supersymmetric parameters are also investigated. The corrections are not sensitive to $M_{SU(2)}$ (or $|\mu|$) when $M_{SU(2)}~>>~|\mu|$ (or $|\mu|~>>~M_{SU(2)}$) and are weakly dependent on the $\tan{\beta}$ with $M_Q$ (or $|\mu|$) being large enough. But they are sensitive to the c.m.s. energy of the incoming photons.
Hong Zhou
Liang Han
Mian-Lai Zhou
Wen-gan Ma
Yi Jiang
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