Searches for gauge mediated SUSY breaking at LEP

TL;DR

This paper reports on LEP searches for supersymmetric particles in gauge mediated SUSY breaking scenarios, setting mass limits and analyzing the implications for theoretical models.

Contribution

It presents the first combined analysis of LEP data up to 209 GeV to set limits on neutralino and stau masses in gauge mediated SUSY models.

Findings

Excluded neutralino masses up to 97 GeV for prompt decays.

Excluded stau masses up to 86.9 GeV for all lifetimes.

No evidence found for supersymmetric particles in the analyzed data.

Abstract

The four LEP collaborations have performed searches for supersymmetric particles in light gravitino scenarios, when neutralinos and sleptons are produced and may present measurable decay lengths. The highest energy data has been analysed including centre-of-mass energies up to 209 GeV. No evidence for such particles is found, but preliminary limits from the combination allow to exclude at 95% confidence level neutralino masses up to 97 GeV if neutralinos decay promptly and stau masses up to 86.9 GeV for all stau lifetimes. The interpretation of these results in general models is studied to set limits on the parameters of the theory.