Measurement of the cross-section for b-jets produced in association with a Z boson at √s = 7 TeV with the ATLAS detector
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Aad-2012-Measurement of the c.pdf
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1.11 MB
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5ec9d29125ff7c7b37b627c13d057989
Author(s)
Taylor, Frank E.
Date Issued
December 2011
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Measurement of the Cross-Section for b-Jets Produced in Association with a Z Boson at √s = 7 TeV with the ATLAS Detector.” Physics Letters B 706, no. 4–5 (January 2012): 295–313. © 2011 CERN
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Final published version
Abstract
A measurement is presented of the inclusive cross-section for b-jet production in association with a Z boson in pp collisions at a centre-of-mass energy of √s = 7 TeV. The analysis uses the data sample collected by the ATLAS experiment in 2010, corresponding to an integrated luminosity of approximately 36 pb[superscript −1]. The event selection requires a Z boson decaying into high pT electrons or muons, and at least one b-jet, identified by its displaced vertex, with transverse momentum pT>25 GeV and rapidity |y|<2.1. After subtraction of background processes, the yield is extracted from the vertex mass distribution of the candidate b-jets. The ratio of this cross-section to the inclusive Z cross-section (the average number of b-jets per Z event) is also measured. Both results are found to be in good agreement with perturbative QCD predictions at next-to-leading order.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2011.11.059
