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Measurement of W±Z production in proton-proton collisions At √s = 7 TeV with the ATLAS detector

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Fig. 1 The SM tree-level Feynman diagrams for W ± Z production through the s-, t -, and u-channel exchanges in q ¯q  interactions at hadron colliders
Figure 2 (c) shows the E T miss distribution of the selected trilepton events. The events have to satisfy E miss T > 25 GeV.
Table 2 summarizes the systematic uncertainties on the expected signal yields. For electrons and muons, the  recon-struction efficiencies, p T scale and resolution, and  efficien-cies for the isolation and impact-parameter requirements are studied using sa
Figure 3 shows the distributions of the transverse mo- mo-mentum p Z T of the Z boson and the invariant mass mW Z of the W ± Z pair in selected events
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