Measurement of the inclusive 3-jet production differential cross section in proton–proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range
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Khachatryan-2015-Measurement of the i.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
Gulhan, Doga Can
Klute, Markus
Date Issued
May 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 the Inclusive 3-Jet Production Differential Cross Section in Proton–proton Collisions at 7 TeV and Determination of the Strong Coupling Constant in the TeV Range.” Eur. Phys. J. C 75, no. 5 (May 2015). © 2015 CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
This paper presents a measurement of the inclusive 3-jet production differential cross section at a proton–proton centre-of-mass energy of 7 TeV using data corresponding to an integrated luminosity of 5 fb[superscript −1] collected with the CMS detector. The analysis is based on the three jets with the highest transverse momenta. The cross section is measured as a function of the invariant mass of the three jets in a range of 445–3270 GeV and in two bins of the maximum rapidity of the jets up to a value of 2. A comparison between the measurement and the prediction from perturbative QCD at next-to-leading order is performed. Within uncertainties, data and theory are in agreement. The sensitivity of the observable to the strong coupling constant α[subscript S] is studied. A fit to all data points with 3-jet masses larger than 664 GeV gives a value of the strong coupling constant of α[subscript S](M[subscript Z]) = 0.1171 ± 0.0013(exp)[+0.0073 over −0.0047](theo).
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/s10052-015-3376-y
