Measurement of the production cross section of a W boson in association with two b jets in pp collisions at √s=8TeV

The production cross section of a W boson in association with two b jets is measured using a sample of proton–proton collisions at √s = 8TeV collected by the CMS experiment at the CERN LHC. The data sample corresponds to an integrated luminosity of 19.8 fb^(-1). The W bosons are reconstructed via their leptonic decays, W → lν, where l = μ or ee . The fiducial region studied contains exactly one lepton with transverse momentum p^l_T > 30 GeV and pseudorapidity |η^l| 25 GeV and |η| 25 GeV and |η|<4.7. The cross section is measured to be σ(pp → W (lν) + bb) = 0.64 ± 0.03(stat) ± 0.10(syst) ± 0.06 (theo) ± 0.02 (lumi) pb), in agreement with standard model predictions.