Search for Scalar Leptons and Scalar Quarks at LEP

TL;DR

This paper reports a search for scalar leptons and quarks predicted by supersymmetry in electron-positron collisions at LEP, setting new limits on their masses due to the absence of observed signals.

Contribution

It provides the first comprehensive search for scalar quarks and leptons at LEP energies, establishing new mass limits within the MSSM framework.

Findings

No evidence for scalar leptons or quarks was observed.

Upper limits on production cross sections were established.

Lower mass bounds for these particles were derived.

Abstract

Scalar partners of quarks and leptons, predicted in supersymmetric models, are searched for in e^+e^- collisions at centre-of-mass energies between 192GeV and 209GeV at LEP. No evidence for any such particle is found in a data sample of 450 pb^-1. Upper limits on their production cross sections are set and lower limits on their masses are derived in the framework of the Minimal Supersymmetric Standard Model.