Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1997-10-11
Eur.Phys.J.C4:47-74,1998
Physics
High Energy Physics
High Energy Physics - Experiment
61 pages, LaTeX, uses a4p.sty, 23 eps figures included, submitted to Zeit. f. Physik C
Scientific paper
10.1007/s100520050185
Events containing a pair of charged leptons and significant missing transverse momentum are selected from a data sample corresponding to a total integrated luminosity of 20.6 pb^-1 at centre-of-mass energies of 161 GeV and 172 GeV. The observed number of events, four at 161 GeV and nine at 172 GeV, is consistent with the number expected from Standard Model processes, predominantly arising from W+W- production with each W decaying leptonically. This topology is also an experimental signature for the pair production of new particles that decay to a charged lepton accompanied by one or more invisible particles. Further event selection criteria are described that optimise the sensitivity to particular new physics channels. No evidence for new phenomena is observed and limits on the production of scalar charged lepton pairs and other new particles are presented.
et al Ackerstaff K.
The OPAL Collaboration
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