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Inclusive Lambda production in two-photon collisions at LEP
(2004)Physics Letters BJournal Article -
Measurement of the Z-boson mass using e+ e− →Zγ events at centre-of-mass energies above the Z pole
(2004)Physics Letters BJournal Article -
Muon-pair and tau-pair production in two-photon collisions at LEP
(2004)Physics Letters BJournal Article -
Measurement of triple-gauge-boson couplings of the W boson at LEP
(2004)Physics Letters BJournal Article -
Measurement of the atmospheric muon spectrum from 20 to 3000 GeV
(2004)Physics Letters BThe absolute muon flux between 20 and 3000 GeV is measured with the L3 magnetic muon spectrometer for zenith angles ranging from 0°to 58°. Due to the large exposure of about 150 m2sr d, and the excellent momentum resolution of the L3 muon chambers, a precision of 2.3% at 150 GeV in the vertical direction is achieved.The ratio of positive to negative muons is studied between 20 and 500 GeV, and the average vertical muon charge ratio is ...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 -
Measurement of exclusive ρ0 ρ0 production in mid-virtuality two-photon interactions at LEP
(2004)Physics Letters BJournal 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 -
Single- and multi-photon events with missing energy in e+e- collisions at LEP
(2004)Physics Letters BSingle- and multi-photon events with missing energy are selected in 619 pb−1 of data collected by the L3 detector at LEP at centre-of-mass energies between 189 and 209 GeV. The cross sections of the process e+e−→ν ̄νγ (γ ) are found to be in agreement with the Standard Model expectations, and the number of light neutrino species is determined, including lower energy data, to be Nν=2.98±0.05±0.04. Selection results are given in the form ...Journal Article -