کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1851137 | 1528821 | 2014 | 22 صفحه PDF | دانلود رایگان |
The production cross section for a W boson and two b jets is measured using proton–proton collisions at s=7 TeV in a data sample collected with the CMS experiment at the LHC corresponding to an integrated luminosity of 5.0 fb−1. The W+bb¯ events are selected in the W→μνW→μν decay mode by requiring a muon with transverse momentum pT>25 GeVpT>25 GeV and pseudorapidity |η|<2.1|η|<2.1, and exactly two b-tagged jets with pT>25 GeVpT>25 GeV and |η|<2.4|η|<2.4. The measured W+bb¯ production cross section in the fiducial region, calculated at the level of final-state particles, is σ(pp→W+bb¯)×B(W→μν)=0.53±0.05(stat.)±0.09(syst.)±0.06(theo.)±0.01(lum.) pb, in agreement with the standard model prediction. In addition, kinematic distributions of the W+bb¯ system are in agreement with the predictions of a simulation using MadGraph and pythia.
Journal: Physics Letters B - Volume 735, 30 July 2014, Pages 204–225