Measurement of the cross section for the production of a $W$ boson in association with $b^-$ jets in $pp$ collisions at $\\sqrts=7$ TeV with the ATLAS detector
Journal
Physics Letters
Journal Volume
B707
Pages
418-437
Date Issued
2012
Author(s)
Aad, Georges et al. (The ATLAS Collaboration)
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 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 antik t 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.
Type
journal article