The SUSY EW-like corrections to top pair production in photon-photon collisions

TL;DR

This paper calculates the one-loop supersymmetric corrections to top pair production in photon-photon collisions within the MSSM, showing they can be a few percent and depend on collider energy and parameters.

Contribution

It provides the first detailed analysis of SUSY EW-like corrections to top pair production in photon-photon collisions at NLC within the MSSM framework.

Findings

Corrections can reach a few percent for $\gamma\gamma o tar{t}$.

Corrections are weakly dependent on $ an{eta}$ at large $M_Q$ or $|\mu|$.

Corrections are sensitive to the center-of-mass energy of incoming photons.

Abstract

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.