Search for anomalous production of dilepton events with missing transverse momentum in e+ e- collisions at s**(1/2) = 183-Gev to 209-GeV

Collaboration
Jul, 2003
43 pages
Published in:
  • Eur.Phys.J.C 32 (2004) 453-473
e-Print:
Report number:
  • CERN-EP-2003-040
Experiments:

Citations per year

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Abstract:
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.
Note:
  • 42 pages, 15 figures, Submitted to Eur. Phys. J. C Report-no: CERN-EP/2003-040
  • electron positron: colliding beams
  • electron positron: annihilation
  • lepton: pair production
  • mass spectrum: dilepton
  • transverse momentum: missing-energy
  • W: pair production
  • W: leptonic decay
  • new particle: search for
  • sparticle: pair production
  • sparticle: decay
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