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Muon-pair and tau-pair production in two-photon collisions at LEP
(2004)Physics Letters BJournal Article -
Flavor Independent Search for Neutral Higgs Bosons at LEP
(2004)Physics Letters BA flavour independent search for the CP-even and CP-odd neutral Higgs bosons h and A is performed in 624 pb−1 of data collected with the L3 detector at LEP at centre-of-mass energies between 189 and 209 GeV. Higgs boson production through the e+e−→Zh and the e+e−→hA processes is considered and decays of the Higgs bosons into hadrons are studied. No significant signal is observed and 95% confidence level limits on the hZZ and hAZ couplings ...Journal Article -
Search for Color Singlet and Color Reconnection Effects in Hadronic Z Decays at LEP
(2004)Physics Letters BA search is performed in symmetric 3-jet hadronic Z-decay events for evidence of colour singlet production or colour reconnection effects. Asymmetries in the angular separation of particles are found to be sensitive indicators of such effects. Upper limits on the level of colour singlet production or of colour reconnection effects are established for a variety of models.Journal Article -
Search for scalar letpons and scalar quarks at LEP
(2004)Physics Letters BScalar partners of quarks and leptons, predicted in supersymmetric models, are searched for in e+e− collisions at centre-of-mass energies between 192 and 209 GeV at LEP. No evidence for any such particle is found in a data sample of 450 pb−1. Upper limits on their production cross sections are set and lower limits on their masses are derived in the framework of the Minimal Supersymmetric Standard Model.Journal Article