Search for associated production of charginos and neutralinos in the trilepton final state using 2.3 fb-1 of data

TL;DR

This paper reports a search for supersymmetric particles, specifically charginos and neutralinos, in trilepton final states using 2.3 fb-1 of collider data, setting new limits on their production and properties.

Contribution

It introduces a dedicated trilepton event selection method to search for supersymmetry, resulting in improved bounds on supersymmetric particle parameters.

Findings

No evidence of supersymmetry was observed.

Set new limits on production cross section and branching fractions.

Derived bounds on supergravity parameters m_0 and m_1/2.

Abstract

We report the results of a search for associated production of charginos and neutralinos using a data set corresponding to an integrated luminosity of 2.3 fb-1 collected with the D0 experiment during Run II of the Tevatron proton-antiproton collider. Final states containing three charged leptons and missing transverse energy are probed for a signal from supersymmetry with four dedicated trilepton event selections. No evidence for a signal is observed, and we set limits on the product of production cross section and leptonic branching fraction. Within minimal supergravity, these limits translate into bounds on m_0 and m_1/2 that are well beyond existing limits.