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Measurements of the cross sections for open charm and beauty production in γγ collisions at √s=189–202 GeV

CollaborationWith : Achard, Pablo / Ambrosi, Giovanni / Bourquin, Maurice / Braccini, Saverio / Chamizo Llatas, Maria / Deglon, Patrick / Delmeire, Evelyne / Extermann, Pierre / Field, John / Kienzle, Maria-Novella / Malgeri, Luca / Pohl, Martin
Published in Physics Letters. B. 2001, vol. 503, no. 1-2, p. 10-20
Abstract The production of c and b quarks γγ collisions is studied with the L3 detector at LEP with 410 pb−1 of data, collected at centre-of-mass energies from 189 GeV to 202 GeV. Hadronic final states containing c and b quarks are identified by detecting electrons or muons from their semileptonic decays. The cross sections σ (e+e-→e+e-ccX) and σ (e+e-→e+e-bbX) are measured and compared to next-to-leading order perturbative QCD calculations. The cross section of b production is measured in γγ collisions for the first time. It is in excess of the QCD prediction by a factor of three
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L3 COLLABORATION. Measurements of the cross sections for open charm and beauty production in γγ collisions at √s=189–202 GeV. In: Physics Letters. B, 2001, vol. 503, n° 1-2, p. 10-20. https://archive-ouverte.unige.ch/unige:44046

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Deposited on : 2014-12-19

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