Measurement of electroweak production of two jets in association with a Z boson in proton–proton collisions at √s = 8 TeV
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Khachatryan-2015-Measurement of elect.pdf
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Author(s)
Apyan, Aram
Barbieri, Richard Alexander
Busza, Wit
Cali, Ivan Amos
Di Matteo, Leonardo
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Klute, Markus
Lai, Yue Shi
Date Issued
February 2015
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Ero, et al. “Measurement of Electroweak Production of Two Jets in Association with a Z Boson in Proton–proton Collisions at √s = 8 TeV.” Eur. Phys. J. C 75, no. 2 (February 2015). © 2015 CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
The purely electroweak (EW) cross section for the production of two jets in association with a Z boson, in proton–proton collisions at √s = 8 TeV, is measured using data recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 19.7 fb[superscript -1]. The electroweak cross section for the ℓℓ[subscript jj] final state (with ℓ = e or μ and j representing the quarks produced in the hard interaction) in the kinematic region defined by M[subscript ℓℓ] > 50 GeV, M[subscript jj] > 120 GeV, transverse momentum p[subscript Tj] > 25 GeV, and pseudorapidity |η[subscript j]|<5, is found to be σ[subscript EW](ℓℓ[subscript jj]) = 174 ± 15 (stat) ± 40(syst) \,fb, in agreement with the standard model prediction. The associated jet activity of the selected events is studied, in particular in a signal-enriched region of phase space, and the measurements are found to be in agreement with QCD predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-014-3232-5
