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A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at √es=7 TeV with ATLAS

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Berglund, Frida Elina / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / Ferrere, Didier / Gadomski, Szymon / Garcia Navarro, Jose Enrique / Gaumer, Olivier / Gonzalez Sevilla, Sergio / Goulette, Marc / Hamilton, Andrew / Iacobucci, Giuseppe / Leger, Annie / Lister, Alison / Martin Dit Latour, Bertrand / Mora Herrera, Maria Clemencia Rosario / Nektarijevic, Snezana / Nikolics, Katalin / Pasztor, Arpad / Pohl, Martin / Robichaud-Veronneau, Andrée / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin
Published in Physics letters. B. 2012, vol. 708, no. 4-5, p. 221-240
Abstract The ratio of production cross sections of the W and Z bosons with exactly one associated jet is presented as a function of jet transverse momentum threshold. The measurement has been designed to maximise cancellation of experimental and theoretical uncertainties, and is reported both within a particle-level kinematic range corresponding to the detector acceptance and as a total cross-section ratio. Results are obtained with the ATLAS detector at the LHC in pp collisions at a centre-of-mass energy of 7 TeV using an integrated luminosity of 33 pb−1. The results are compared with perturbative leading-order, leading-log, and next-to-leading-order QCD predictions, and are found to agree within experimental and theoretical uncertainties. The ratio is measured for events with a single jet with pT>30 GeVpT>30 GeV to be 8.73±0.30(stat)±0.40(syst)8.73±0.30(stat)±0.40(syst) in the electron channel, and 8.49±0.23(stat)±0.33(syst)8.49±0.23(stat)±0.33(syst) in the muon channel.
Keywords W bosonZ bosonStandard ModelPerturbative QCD
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ATLAS COLLABORATION. A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at √es=7 TeV with ATLAS. In: Physics letters. B, 2012, vol. 708, n° 4-5, p. 221-240. doi: 10.1016/j.physletb.2012.01.042 https://archive-ouverte.unige.ch/unige:40826

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Deposited on : 2014-10-10

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