Production rates of bb¯ quark pairs from gluons and bb¯bb¯ events in hadronic Z0 decays

Kartvelishvili, Vakhtang (2001) Production rates of bb¯ quark pairs from gluons and bb¯bb¯ events in hadronic Z0 decays. European Physical Journal C: Particles and Fields, 18 (3). pp. 447-460. ISSN 1434-6044

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Abstract

The rates are measured per hadronic Z0 decay for gluon splitting to bb¯ quark pairs, gbb¯, and of events containing two bb¯ quark pairs, g4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb¯ quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices. For the event sample containing two bb¯ quark pairs, three of the four jets are required to have a significantly detached secondary vertex. Information from the event topology is combined in a likelihood fit to extract the values of gbb¯ and g4b, namely gbb = (3.07 ± 0.53(stat) ± 0.97(syst)) × 10−3, g4b = (0.36 ± 0.17(stat) ± 0.27(syst)) × 10−3.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
82878
Deposited By:
Deposited On:
15 Nov 2016 10:50
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 06:25