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Measurement of the Gamma (b anti-b) / Gamma (hadron) branching ratio of the Z by double hemisphere tagging

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Abreu, P. [--] Cortina Gil, Eduardo [UCL] DELPHI Collaboration [--]

Two measurements of Γbbˉ/Γhad are presented. Both measurements use 250000Z decays taken with the DELPHI detector in 1991 and rely mainly on the precision of the microvertex detector. One tagging method is as simple as possible so that background rates can be reliably predicted by simulation. The other one uses a more involved tagging technique and reduces the dependence on simulation as much as possible. Combining both results, Γbbˉ/Γhad is found to be 0.2209±0.0041(stat.)±0.0042(syst.)±0.0018 Γccˉ .

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 1995
Language Anglais
Journal information "Zeitschrift für Physik. C, Particles and fields" - Vol. 65, no.4, p. 555-568 (1995)
Publisher Springer (Berlin)
issn 0170-9739
e-issn 1431-5858
Publication status Publié
Affiliation UCL - SC/PHYS - Département de physique
Links
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Bibliographic reference Abreu, P. ; Cortina Gil, Eduardo ; DELPHI Collaboration. Measurement of the Gamma (b anti-b) / Gamma (hadron) branching ratio of the Z by double hemisphere tagging. In: Zeitschrift für Physik. C, Particles and fields, Vol. 65, no.4, p. 555-568 (1995)
Permanent URL http://hdl.handle.net/2078.1/127086