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

Author(s)
Apyan, Aram; Bauer, Gerry P; Busza, Wit; Cali, Ivan Amos; Di Matteo, Leonardo; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Levin, Andrew Michael; Luckey Jr, P David; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Stephans, George S. F.; Stoeckli, Fabian; Sumorok, Konstanty C; Velicanu, Dragos Alexandru; Wolf, R.; Wyslouch, Boleslaw; Yang, M.; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Wyslouch, Victoria; Chan, M.; Kim, Y.; ... Show more Show less
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Abstract
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[superscript −1]. The W + b[bar over b] events are selected in the Wdecay mode by requiring a muon with transverse momentum p[subscript T] and 25 GeV pseudorapidity |η| < 2.1, and exactly two b-tagged jets with and p[subscript T] and 25 GeV pseudorapidity |η| < 2.4. The measured W + b[bar over b] production cross section in the fiducial region, calculated at the level of final-state particles, is σ(pp → W + b[bar over b) x B(W → μν) = 0.53 ± 0.05 (stat.) ± 0.09 (syst.) ± 0.06, in (theo.) ± 0.01 (lum.)pb, in agreement with the standard model prediction. In addition, kinematic distributions of the W + b(bar over b) system are in agreement with the predictions of a simulation using MadGraph and pythia. Keywords: CMS, Physics, SMP
Date issued
2014-06
URI
http://hdl.handle.net/1721.1/115582
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S., et al. “Measurement of the Production Cross Section for a W Boson and Two b Jets in Pp Collisions at √S=7 TeV.” Physics Letters B, vol. 735, July 2014, pp. 204–25. © 2014 The Authors
Version: Final published version
ISSN
0370-2693

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