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A measurement of the ratio of the production cross sections for W and Z bosons in association with jets with the ATLAS detector

et al.
Abstract

The ratio of the production cross sections for W$$W$$ and Z$$Z$$ bosons in association with jets has been measured in proton–proton collisions at s=7TeV$$\sqrt{s}=7\,\mathrm {TeV}$$ with the ATLAS experiment at the Large Hadron Collider. The measurement is based on the entire 2011 dataset, corresponding to an integrated luminosity of 4.6fb-1$$4.6\,\mathrm {fb}^{-1}$$. Inclusive and differential cross-section ratios for massive vector bosons decaying to electrons and muons are measured in association with jets with transverse momentum pT>30GeV$$p_\mathrm {T} >30\,\mathrm {GeV}$$ and jet rapidity |y|<4.4$$|y| < 4.4$$. The measurements are compared to next-to-leading-order perturbative QCD calculations and to predictions from different Monte Carlo generators implementing leading-order matrix elements supplemented by parton showers.

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