Selectron Mass Effects in Neutralino Production

TL;DR

This paper explores how measuring neutralino production at a linear collider with polarized beams can reveal selectron masses, especially when GUT relations are relaxed, by analyzing cross sections and polarization asymmetries.

Contribution

It introduces a method to determine selectron masses through polarization asymmetries in neutralino production, relaxing GUT mass relations in the MSSM.

Findings

Polarization asymmetries are sensitive to selectron masses.

Relaxing GUT relations leads to large effects in observables.

Method enables mass determination of both selectrons.

Abstract

We study the possibility to measure the masses of the selectrons in neutralino production at an e^+ e^- linear collider with polarized beams. The cross sections and polarization asymmetries of neutralinos with gaugino character strongly depend on the masses of the exchanged selectrons. If the usual GUT relations of the selectron masses in the MSSM are relaxed large effects are possible especially in the polarization asymmetries. These can be used to determine the masses of both selectrons.