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Type: Journal article
Title: Measurement of the cross-section for b-jets produced in association with a Z boson at √ s = 7 TeV with the ATLAS detector
Other Titles: Measurement of the cross-section for b-jets produced in association with a Z boson at root s = 7 TeV with the ATLAS detector
Author: Aad, G.
ATLAS Collaboration
Citation: Physics Letters B, 2012; 706(4-5):295-313
Publisher: Elsevier
Issue Date: 2012
ISSN: 0370-2693
Statement of
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M. J. White ... et al. (ATLAS Collaboration)
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⁻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.
Keywords: standard Model; Z boson; b-Jet; Cross-section
Rights: © 2011 CERN. Published by Elsevier B.V. Open access under CC BY-NC-NC license [].
RMID: 0020132896
DOI: 10.1016/j.physletb.2011.11.059
Published version: http://elsevier/
Appears in Collections:Physics publications

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