Search for Supersymmetric Particles with R-Parity Violating Decays in e+e- Collisions at sqrt{s} up to 209GeV

TL;DR

This paper reports on searches for supersymmetric particles with R-parity violation in electron-positron collisions at energies up to 209 GeV, setting limits on their production and masses based on ALEPH data.

Contribution

It provides the first comprehensive search for supersymmetric particles with R-parity violation at LEP energies, establishing new constraints on their properties.

Findings

No excess events observed beyond Standard Model predictions.

Limits set on production cross sections of supersymmetric particles.

Lower bounds established on masses of charginos, sleptons, squarks, and sneutrinos.

Abstract

Searches for the pair production of supersymmetric particles under the assumption that R-parity is violated via a single dominant LLEbar, LQDbar or UbarDbarDbar coupling are performed using the data collected by the ALEPH detector at LEP at centre-of-mass energies from 189 to 209GeV. The numbers of observed candidate events in the data are in agreement with the Standard Model expectation, and limits on the production cross sections and on the masses of charginos, sleptons, squarks and sneutrinos are derived.