# Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

2 APC - Neutrinos
APC (UMR_7164) - AstroParticule et Cosmologie, LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6 Laboratoire de Physique Corpusculaire
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
Abstract : 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 sqrt(s)=7 TeV. Production via top decay is not included in the signal definition. The measurement is based on 35 pb^-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. The results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value.
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Journal articles
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http://hal.in2p3.fr/in2p3-00620629
Contributor : Swarna Bassava <>
Submitted on : Friday, September 9, 2011 - 3:50:32 PM
Last modification on : Wednesday, September 23, 2020 - 4:37:55 AM

### Citation

G. Aad, T. Beau, S. Bordoni, G. Calderini, A. Camard, et al.. Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physics Letters B, Elsevier, 2012, 707, pp.418-437. ⟨10.1016/j.physletb.2011.12.046⟩. ⟨in2p3-00620629⟩

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