Measurement of W+W−production in association with one jet in proton–proton collisions at √s=8 TeVwith the ATLAS detector
Citable Link (URL):http://resolver.sub.uni-goettingen.de/purl?gs-1/13830
The production of Wboson pairs in association with one jet in ppcollisions at √s=8TeVis studied using data corresponding to an integrated luminosity of 20.3fb−1collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The cross section is measured in a fiducial phase-space region defined by the presence of exactly one electron and one muon, missing transverse momentum and exactly one jet with a transverse momentum above 25GeV and a pseudorapidity of |η| <4.5. The leptons are required to have opposite electric charge and to pass transverse momentum and pseudorapidity requirements. The fiducial cross section is found to be σfid,1-jetWW=136 ±6 (stat)±14 (syst)±3 (lumi)fb. In combination with a previous measurement restricted to leptonic final states with no associated jets, the fiducial cross section of WWproduction with zero or one jet is measured to be σfid,≤1-jetWW=511 ±9 (stat)±26 (syst)±10 (lumi)fb. The ratio of fiducial cross sections in final states with one and zero jets is determined to be 0.36 ±0.05. Finally, a total cross section extrapolated from the fiducial measurement of WWproduction with zero or one associated jet is reported. The measurements are compared to theoretical predictions and found in good agreement.
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