Full one-loop QCD and electroweak corrections to sfermion pair production in $\gamma \gamma$ collisions

Abstract

We have calculated the full one-loop electroweak (EW) and QCD corrections to the third generation scalar-fermion pair production processes $e^{+}{e}^{-}\to \gamma \gamma \to \widetilde{f_i}\overline{\stackrel{~}{f_i}}(f=t,b,\tau )$ 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.

to be appeared in Phys. Rev. D