Search for R-Parity Violating Decays of Supersymmetric Particles in e+e- Collisions at Centre-of-Mass Energies from 189GeV to 202GeV

TL;DR

This paper reports on searches for supersymmetric particles with R-parity violation using LEP data, setting limits on their production cross sections and masses, and finding no significant deviations from the Standard Model.

Contribution

First comprehensive search for R-parity violating supersymmetric particles at LEP energies, establishing new constraints on their masses and production rates.

Findings

No evidence of supersymmetric particle production observed.

Upper limits set on production cross sections.

Lower mass bounds established for various supersymmetric particles.

Abstract

Searches for the production of supersymmetric particles under the assumption that R-parity is violated via a single dominant LLE, LQD or UDD coupling were performed. These use the data collected by the ALEPH detector at LEP at centre-of-mass energies from 188.6 to 201.6 GeV. The numbers of candidate events observed in the data are consistent with Standard Model expectations. Upper limits on the production cross sections and lower limits on the masses of charginos, sleptons, squarks and sneutrinos are derived.