Measurement of Gamma (bbˉ) / Gamma (hadrons) using impact parameter measurements and lepton identification

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1995) Zeitschrift für Physik. C, Particles and fields — Vol. 66, n° 3, p. 323-340 (1995)

Files

art_101007_BF01556358.pdf
  • Open Access
  • Adobe PDF
  • 1.68 MB
Download

Details

Authors
Abstract
The partial decay width of the Z to bb quark pairs has been measured by the DELPHI detector at LEP. b-hadrons, containing b-quarks, were tagged by leptons with high transverse momentum relative to the hadron or by tracks with large impact parameters to the primary vertex. The ratio of the numbers of events with a single such tag to those with two tags was used to estimate the efficiency of the method and to reduce the systematic uncertainty. Combining all methods, the value: ... was found, where the third error corresponds to a 4-8% uncertainty on the cg production width. A maximum likelihood fit to the single and di-lepton distributions gave the branching fraction of the decays of b-quarks to leptons as: ...
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1995). Measurement of Gamma (bbˉ) / Gamma (hadrons) using impact parameter measurements and lepton identification. Zeitschrift für Physik. C, Particles and fields, 66(3), 323-340. https://doi.org/10.1007/BF01556358 (Original work published 1995)