Search for chargino and neutralino production at √s = 192-209 GeV at LEP: The OPAL collaboration

Abstract

Approximately 438 pb-1 of e+e- data from the OPAL detector, taken with the LEP collider running at centre-of-mass energies of 192-209 GeV, are analyzed to search for evidence of chargino pair production, e+e- →1 +χ̃1- or neutralino associated production, e+e- → χ̃2 0χ̃10 Limits are set at the 95% confidence level on the product of the cross-section for the process e +e- →1 +χ̃1- and its branching ratios to topologies containing jets and missing energy, or jets with a lepton and missing energy, and on the product of the cross-section for e+e- →20χ̃10 and its branching ratio to jets. R-parity conservation is assumed throughout this paper. When these results are interpreted in the context of th..