Search for Stable and Long-Lived Massive Charged Particles with the OPAL Detector at LEP in e+e- Collisions at \sqrt{s}=130-183 GeV

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dc.creatorThe OPAL Collaboration
dc.creatoral, K. Ackerstaff et
dc.date1998-03-25
dc.date.accessioned2026-07-07T12:02:20Z
dc.date.available2026-07-07T12:02:20Z
dc.descriptionA search for stable and long-lived massive particles of electric charge |Q/e| = 1 or 2/3, pair-produced in e+e- collisions at centre-of-mass energies from 130 to 183 GeV, is reported by the OPAL collaboration at LEP. No evidence for production of these particles was observed in a mass range between 45 and 89.5 GeV. Model-independent upper limits on the production cross-section between 0.05 and 0.19 pb have been derived for scalar and spin-1/2 particles with charge +/-1. Within the framework of the minimal supersymmetric model (MSSM), this implies a lower limit of 82.5 (83.5) GeV on the mass of long-lived right- (left-)handed scalar muons and scalar taus. Long-lived charged leptons and charginos are excluded for masses below 89.5 GeV. For particles with charge +/-2/3 the upper limits on the production cross-section vary between 0.05 and 0.2 pb. All limits, on masses and on cross-sections, are valid at the 95% confidence level for particles with lifetimes longer than 10^{-6} s.
dc.description19 pages, LaTeX, 4 colour eps figures included, submitted to Physics Letters B
dc.identifierhttps://arxiv.org/abs/hep-ex/9803026
dc.identifierhttp://arxiv.org/abs/hep-ex/9803026
dc.identifierPhys.Lett.B433:195-208,1998
dc.identifierdoi:10.1016/S0370-2693(98)00518-8
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207408
dc.subjectHigh Energy Physics - Experiment
dc.titleSearch for Stable and Long-Lived Massive Charged Particles with the OPAL Detector at LEP in e+e- Collisions at \sqrt{s}=130-183 GeV
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