CMS-SMP-12-026

CMS-SMP-12-026 ; CERN-PH-EP-2013-223
Measurement of the production cross section for a W boson and two b jets in pp collisions at $\sqrt{s}$ = 7 TeV
CMS Collaboration
23 December 2013
Phys. Lett. B 735 (2014) 204
Abstract: The production cross section for a W boson and two b jets is measured using proton-proton collisions at $\sqrt{s}$ = 7 TeV in a data sample collected with the CMS experiment at the LHC corresponding to an integrated luminosity of 5.0 inverse femtobarns. The W + $b\bar{b}$ events are selected in the $W \to \mu\nu$ decay mode by requiring a muon with transverse momentum $p_T$ > 25 GeV and pseudorapidity abs( $\eta$ ) < 2.1, and exactly two b-tagged jets with $p_T$ > 25 GeV and abs( $\eta$ ) < 2.4. The measured W + $b\bar{b}$ production cross section in the fiducial region, calculated at the level of final-state particles, is $\sigma(pp \to W+ b\bar{b}) B(W \to \mu\nu)$ = 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 + $b\bar{b}$ system are in agreement with the predictions of a simulation using MADGRAPH and PYTHIA.
Links: e-print arXiv:1312.6608 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; HepData record ; CADI line (restricted) ;

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