First measurement of the double-inclusive B/Bbar hadron energy distribution in e+e- annihilations, and of angle-dependent moments of the B and Bbar energies

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dc.creatorSLD Collaboration
dc.creatorAbe, Koya
dc.date2003-09-18
dc.date.accessioned2026-07-07T12:02:06Z
dc.date.available2026-07-07T12:02:06Z
dc.descriptionWe have made the first measurement of the double-inclusive B/Bbar energy distribution in e+e- annihilations, using a sample of 400,000 hadronic Z0 decay events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B/Bbar decay vertices with high efficiency and purity, and to provide measurements of the kinematic quantities used to calculate the B energies in this novel technique. We measured the B/Bbar energies with good efficiency and resolution over the full kinematic range. We measured moments of the scaled energies of the B and Bbar hadrons vs. the opening angle between them. By comparing these results with perturbative QCD predictions we tested the ansatz of factorisation in heavy-quark production. A recent next-to-leading order calculation reproduces the data.
dc.description17 pages, 6 figures; submitted to Physics Letters B
dc.identifierhttps://arxiv.org/abs/hep-ex/0309058
dc.identifierhttp://arxiv.org/abs/hep-ex/0309058
dc.identifierPhys.Lett.B578:45-53,2004
dc.identifierdoi:10.1016/j.physletb.2003.10.057
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207322
dc.subjectHigh Energy Physics - Experiment
dc.titleFirst measurement of the double-inclusive B/Bbar hadron energy distribution in e+e- annihilations, and of angle-dependent moments of the B and Bbar energies
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