Detection of sleptons at a linear collider in models with small slepton-neutralino mass differences

Abstract

A feasibility study is presented to precisely measure the masses of charged sleptons and the lightest neutralino in $e^{+}{e}^{-}\to \text{smur}\text{smur}$ and $e^{+}{e}^{-}\to {\text{stau}}_1{\text{stau}}_1$ production. Different mSUGRA scenarios with small slepton-neutralino mass differences of a few GeV are invesigated. The analysis is based on a detailed simulation of the final state lepton energy spectra including background reactions and assuming realistic experimental conditions at the TESLA $e^{+}{e}^{-}$ Linear Collider. Effects on the mass resolutions due to beams colliding head-on or under a crossing angle are discussed.

Comments: 11 pages, 6 figures. Contribution to the ECFA LC Study and the International Conference on Linear Colliders, LCWS04