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Scientific article
English

Measurement of the cross-section for b-jets produced in association with a Z boson at √s=7 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 706, no. 4-5, p. 295-313
Publication date2012
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 pTpT electrons or muons, and at least one b-jet, identified by its displaced vertex, with transverse momentum pT>25 GeVpT>25 GeV and rapidity |y|<2.1|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
Citation (ISO format)
ATLAS Collaboration. Measurement of the cross-section for <em>b</em>-jets produced in association with a <em>Z</em> boson at √s=7 TeV with the ATLAS detector. In: Physics letters. B, 2012, vol. 706, n° 4-5, p. 295–313. doi: 10.1016/j.physletb.2011.11.059
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Article (Published version)
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ISSN of the journal0370-2693
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