Measurement of the production cross section for W-bosons in association with jets in pp collisions at √s = 7 TeV with the ATLAS detector
Author(s)Taylor, Frank E.
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This Letter reports on a first measurement of the inclusive W+jets cross section in proton–proton collisions at a centre-of-mass energy of 7 TeV at the LHC, with the ATLAS detector. Cross sections, in both the electron and muon decay modes of the W-boson, are presented as a function of jet multiplicity and of the transverse momentum of the leading and next-to-leading jets in the event. Measurements are also presented of the ratio of cross sections [σ(W+⩾n) over σ(W+⩾n−1)] for inclusive jet multiplicities n=1–4. The results, based on an integrated luminosity of 1.3 pb[superscript −1], have been corrected for all known detector effects and are quoted in a limited and well-defined range of jet and lepton kinematics. The measured cross sections are compared to particle-level predictions based on perturbative QCD. Next-to-leading order calculations, studied here for n⩽2, are found in good agreement with the data. Leading-order multiparton event generators, normalized to the NNLO total cross section, describe the data well for all measured jet multiplicities.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physics Letters B
Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Measurement of the Production Cross Section for W-Bosons in Association with Jets in Pp Collisions at √s = 7 TeV with the ATLAS Detector.” Physics Letters B 698, no. 5 (April 2011): 325–345.
Final published version