Search for $\widetilde{W}_1\widetilde{Z}_2$ Production via Trilepton Final States in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV

TL;DR

This study searched for supersymmetric particle production in proton-antiproton collisions at 1.8 TeV using the D0 detector, focusing on events with three leptons, but found no evidence and set production limits.

Contribution

First search for $ ilde{W}_1 ilde{Z}_2$ production via trilepton final states at the Tevatron, establishing new limits in the absence of observed signals.

Findings

No evidence for $ ilde{W}_1 ilde{Z}_2$ production.

Set upper limits on production cross section times branching ratios.

Constrained supersymmetric parameter space.

Abstract

We have searched for associated production of the lightest chargino, $\widetilde{W}_1$, and next-to-lightest neutralino, $\widetilde{Z}_2$, of the Minimal Supersymmetric Standard Model in $p\bar{p}$ collisions at \mbox{$\sqrt{s}$ = 1.8 TeV} using the \D0 detector at the Fermilab Tevatron collider. Data corresponding to an integrated luminosity of 12.5$\pm 0.7$ \ipb were examined for events containing three isolated leptons. No evidence for $\widetilde{W}_1\widetilde{Z}_2$ pair production was found. Limits on $\sigma(\widetilde{W}_1\widetilde{Z}_2)$Br$(\widetilde{W}_1\to l\nu\widetilde{Z}_1)$Br$(\widetilde{Z}_2\to l\bar{l}\widetilde{Z}_1)$ are presented.