2003/09/03 by The OPAL Collaboration, The OPAL collaboration, G. Abbiendi · 2 citations
Engineering · Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Economics #Engineering #Financial economics #Lepton #Momentum (technical analysis) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Transverse plane #hep-ex
paper · pdf · doi:10.1140/epjc/s2003-01466-y
published as Eur.Phys.J.C32:453-473,2004 · 42 pages, 15 figures, Submitted to Eur. Phys. J. C
arxiv created 2003/09/03 · openalex publication_date 2004/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In total 1317 di-lepton events with significant missing transverse momentum were identified in a total data sample of 680 pb-1 collected at e+e- centre-of-mass energies ranging from 183 GeV to 209 GeV. The number of di-lepton events, the dependence on centre-of-mass energy, and the event properties are consistent with expectations from Standard Model processes, predominantly W+W- production with both W bosons 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. No evidence for new phenomena is apparent. Upper limits are presented on the production cross-section multiplied by the relevant branching ratio squared for sleptons, leptonically decaying charginos and charged Higgs bosons. Mass limits are also given.