Improved measurement of the probability for gluon splitting into bb̄ in Z0 decays

Journal article

We have measured gluon splitting into bottom quarks, g → bb̄, 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 flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ jets. The upgraded CCD-based vertex detector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g → bb̄ production per hadronic event, gbb̄, to be (2.44 ± 0.59(stat.) ± 0.34(syst.)) × 10-3. © 2001 Elsevier Science B.V.

Authors: Abe, K; Abe, K; Abe, T; Adam, I; Akimoto, H

• Journal: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 507
• Issue: 1-4
• Pages: 61-69
• Publication date: 2001-05-17
• DOI: 10.1016/S0370-2693(01)00367-7
• ISSN: 0370-2693
• Language: English