Chargino search at ILC

Abstract

The lighter chargino (chi1) is a prime candidate to be thenext-to-lightest SUSY particle (the NLSP). Several analyses have beendone of chi1 pair-production at the ILC, at specific model-points,showing that detection and property-determination is possible, even forvery difficult cases. However, no recent studies have evaluated thereach of the ILC to detect chi1 pair production in general. In thiscontribution, cross sections for chi1 production at the ILC wereevaluated with a wide range of parameters. The aim of the study was todetermine the conditions for the lowest cross sections and comparethese worst-case values with an estimation of the cross section limitfor the observation of the lightest charginos at the ILC. The estimatedlimits were extrapolated from the studies performed at LEP, which canalso be regarded as a worst-case scenario