Z radiation off stops at a linear collider

TL;DR

This paper calculates the production cross-section of stop pairs with Z bosons at a linear collider, highlighting how the process depends on the stop mass, especially when one stop is too heavy for direct detection.

Contribution

It provides a detailed calculation of e+e- --> stop/stop/Z process and compares it to stop/stop/h production, revealing sensitivity to the heavier stop mass.

Findings

Cross-section depends on the mass difference between stops.

Sensitivity to m(stop2) when stop2 is too heavy for direct production.

Comparison shows different dependencies for Z and h associated production.

Abstract

We calculate e+e- --> stop/stop/Z at a linear collider. For large splitting between the two stops the cross-section is sensitive to the value of m(stop2) when this particle is too heavy to be directly produced. The results are compared to e+e- --> stop/stop/h.