Search
Results
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Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP
(2005)Physics Letters BThe evolution of the electromagnetic coupling, α, in the momentum-transfer range 1800 GeV2 < -Q2 < 21600 GeV2 is studied with about 40 000 Bhabha-scattering events collected with the L3 detector at LEP at centre-of-mass energies √s = 189-209 GeV. The running of α is parametrised as: α(Q2) = α0/1 - C Δα(Q2), where α ≡ α(Q2 = 0) is the fine-structure constant and C = 1 corresponds to the evolution expected in QED. A fit to the differential ...Journal Article -
A search for flaring very-high-energy cosmic γ-ray sources with the L3+C muon spectrometer
(2006)Astroparticle PhysicsJournal Article -
Z boson pair-production at LEP
(2003)Physics Letters BEvents stemming from the pair-production of Z bosons in e+e- collisions are studied using 217.4 pb-1 of data collected with the L3 detector at centre-of-mass energies from 200 GeV up to 209 GeV. The special case of events with b quarks is also investigated. Combining these events with those collected at lower centre-of-mass energies, the Standard Model predictions for the production mechanism are verified. In addition, limits are set on ...Journal Article -
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Measurement of exclusive ρ+ ρ− production in mid-virtuality two-photon interactions and study of the γγ∗→ ρρ process at LEP
(2005)Physics Letters BJournal Article -
Z-boson production with two unobserved, back-to-back, hard photons at LEP
(2005)Physics Letters BJournal 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 -
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The solar flare of the 14th of July 2000 (L3+C detector results)
(2006)Astronomy & AstrophysicsJournal Article