Searches for supersymmetric particles in e+e- collisions up to 208 GeV and interpretation of the results within the MSSM

TL;DR

This paper reports on searches for supersymmetric particles in electron-positron collisions up to 208 GeV, setting new limits on their masses and the parameter space of the MSSM with no evidence of detection.

Contribution

It provides the first comprehensive analysis of DELPHI data up to 208 GeV for supersymmetric particles within the MSSM framework, establishing new exclusion limits.

Findings

No evidence for supersymmetric particles was observed.

Limits were set on production cross-sections and particle masses.

Excluded regions in the MSSM parameter space were identified.

Abstract

DELPHI data collected at centre-of-mass energies up to 208 GeV have been analysed to search for charginos, neutralinos and sfermions in the framework of the Minimal Supersymmetric Standard Model (MSSM) with R-parity conservation. No evidence for a signal was found in any of the channels. The results of each search were used to derive limits on production cross-sections and particle masses. In addition, the combined result of all searches excludes regions in the parameter space of the constrained MSSM, leading to limits on the mass of the Lightest Supersymmetric Particle and other supersymmetric particles.