Neutralino pair production via photon-photon collisions at the ILC

TL;DR

This paper provides the first complete one-loop predictions for neutralino pair production via photon-photon collisions at the ILC within the MSSM, analyzing cross section dependencies on key parameters.

Contribution

It offers a comprehensive one-loop calculation of neutralino pair production at the ILC, exploring parameter space regions with detectable cross sections based on neutralino compositions.

Findings

Cross sections peak when neutralinos have specific gaugino/Higgsino compositions.

Parameter regions with large cross sections are identified for potential detection.

Dependence of cross section on energy and tanβ is thoroughly analyzed.

Abstract

We provide complete one-loop predictions for the direct production of the neutralino pairs via photon-photon collisions which appears for the first time at one-loop level in the minimal supersymmetric standard model at the International Linear Collider. We present a comprehensive investigation of the dependence of total cross section on the center-of-mass energy and the tan$\beta$ for three different scenarios based on gaugino/Higgsino fractions of the neutralinos. Furthermore, by investigating the behavior with the most relevant parameters $\mu$ and $M_2$, we exhibit regions of the parameter space where the enhancement of the cross section is large enough to be detectable at linear colliders. Our analysis shows that the corresponding production cross section reaches its highest values when the lightest neutralino $\widetilde{\chi}_{1}^0$ has a dominant Higgsino component and/or the next-to-lightest neutralino $\widetilde{\chi}_{2}^0$ has a dominant gaugino component.