Search for R-parity Violating Decays of Supersymmetric Particles in e+e- Collisions at root(s)=189GeV

TL;DR

This paper reports a search for specific supersymmetric particle decays violating R-parity in electron-positron collisions at 189 GeV, setting new limits on their production and masses.

Contribution

First search for R-parity violating supersymmetric particle decays at 189 GeV e+e- collisions, establishing constraints on cross sections and particle masses.

Findings

No signal observed in the data sample.

Limits set on production cross sections.

Constraints on supersymmetric particle masses.

Abstract

A search for chargino, neutralino and scalar lepton pair-production in e+e- collisions at the centre-of-mass energy of 189 GeV is performed under the assumptions that R-parity is not conserved in decays and only one of the coupling constants lambda_ijk, lambda'_ijk or lambda''_ijk is non-negligible. No signal is found in a data sample corresponding to an integrated luminosity of 176.4 pb-1. Limits on the production cross sections, on the Minimal Supersymmetric Standard Model parameters and on the masses of the supersymmetric particles are derived.