Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-03-17
Phys.Rev.D71:055009,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
to be appeared in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.71.055009
We have calculated the full one-loop electroweak (EW) and QCD corrections to the third generation scalar-fermion pair production processes $e^+e^- \to \gamma \gamma \to \tilde{f_i}\bar{\tilde{f_i}} (f=t,b,\tau)$ at an electron-positron linear collider(LC) in the minimal supersymmetric standard model (MSSM). We analyze the dependence of the radiative corrections on the parameters such as the colliding energy $\sqrt{\hat s}$ and the SUSY fundamental parameters $A_f$, $\tan \beta$, $\mu$, $M_{SUSY}$ and so forth. The numerical results show that the EW corrections to the squark-, stau-pair production processes and QCD corrections to the squark-pair production processes give substantial contributions in some parameter space. The EW relative corrections to squark-pair production processes can be comparable with QCD corrections at high energies. Therefore, these EW and QCD corrections cannot be neglected in precise measurement of sfermion pair productions via $\gamma\gamma$ collision at future linear colliders.
Gang Li
Li-Rong Xing
Liang Han
Ren-You Zhang
Wen-gan Ma
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