Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at s = 7 TeV with the ATLAS detector
A measurement is presented of the cross section for the production of a W boson with one or two jets, of which at least one must be a b-jet, in pp collisions at √s = 7TeV. Production via top decay is not included in the signal definition. The measurement is based on 35pb–1 of data collected with the ATLAS detector at the LHC. The W + b-jet cross section is defined for jets reconstructed with the anti-kt clustering algorithm with transverse momentum above 25 GeV and rapidity within ±2.1. The b-jets are identified by reconstructing secondary vertices. The fiducial cross section is measured both for the electron and muon decay channel of the W boson and is found to be 10.2 ± 1.9(stat) ± 2.6(syst)pb for one lepton flavour. Here, the results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- ATLAS Collaboration
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1212533
- Alternate ID(s):
- OSTI ID: 1380170
- Report Number(s):
- SLAC-PUB-17032; S0370269311015036; PII: S0370269311015036
- Journal Information:
- Physics Letters B, Vol. 707, Issue 5; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
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