1999/08/06 by Kenji Abe et al, al, Kenji Abe et
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/9908028
16 pages latex including 4 figures in eps format. Submitted to 1999 Lepton-Photon Symposium
arxiv created 1999/08/06 · openalex publication_date 1999/08/06 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/08/01
We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g -> b bbar, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavour. 4-jet events were identified, and a topological vertex-mass technique was applied to each jet in order to identify b or bbar jets. The upgraded CCD based vertex detector gives very high B-tagging efficiency, especially for B hadrons of the low energies typical of this process. The two most nearly collinear b/bbar jets were tagged as originating from g -> b bbar. We measured the rate of secondary b/bbar production per hadronic event, gbb, to be (3.07+-0.71(stat.)+-0.66(syst.)) * 10**-3.