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Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at √s=7 TeV with the ATLAS detector

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 / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin
Published in Physics Letters. B. 2012, vol. 707, no. 5, p. 418-437
Abstract A measurement is presented of the cross section for the production of a W boson with one or two jets, of which at least one must be a b -jet, in pp collisions at √s=7 TeV. Production via top decay is not included in the signal definition. The measurement is based on 35 pb−135 pb−1 of data collected with the ATLAS detector at the LHC. The W+bW+b-jet cross section is defined for jets reconstructed with the anti-ktkt clustering algorithm with transverse momentum above 25 GeV and rapidity within ±2.1. The b-jets are identified by reconstructing secondary vertices. The fiducial cross section is measured both for the electron and muon decay channel of the W boson and is found to be 10.2±1.9(stat)±2.6(syst) pb10.2±1.9(stat)±2.6(syst) pb for one lepton flavour. The results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value.
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ATLAS COLLABORATION. Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at √s=7 TeV with the ATLAS detector. In: Physics Letters. B, 2012, vol. 707, n° 5, p. 418-437. https://archive-ouverte.unige.ch/unige:40539

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Deposited on : 2014-09-26

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