Measurement of the production cross section for a W boson and two b jets in pp collisions at sqrt(s) = 7 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physics Letters B Year : 2014

Measurement of the production cross section for a W boson and two b jets in pp collisions at sqrt(s) = 7 TeV

S. Chatrchyan
  • Function : Author
P. Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier

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 b-bar events are selected in the W to mu nu decay mode by requiring a muon with transverse momentum pt>25 GeV and pseudorapidity abs(eta)<2.1, and exactly two b-tagged jets with pt>25 GeV and abs(eta)<2.4. The measured W+b b-bar production cross section in the fiducial region, calculated at the level of final-state particles, is sigma(pp to W+b b-bar) 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 b-bar system are in agreement with the predictions of a simulation using MADGRAPH and PYTHIA.

Dates and versions

in2p3-00925482 , version 1 (08-01-2014)

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Cite

S. Chatrchyan, S. Baffioni, F. Beaudette, L. Benhabib, M. Bluj, et al.. Measurement of the production cross section for a W boson and two b jets in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, 2014, 735, pp.204-225. ⟨10.1016/j.physletb.2014.06.041⟩. ⟨in2p3-00925482⟩
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