Measurement and QCD analysis of double-differential inclusive jet cross sections in pp collisions at √s = 8 TeV and cross section ratios to 2.76 and 7 TeV
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Khachatryan2017_Article_MeasurementAndQCDAnalysisOfDou.pdf
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Author(s)
CMS Collaboration
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Demiragli, Zeynep
Date Issued
March 2017
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, T. Bergauer, et al. “Measurement and QCD analysis of double-differential inclusive jet cross sections in pp collisions at √s = 8 TeV and cross section ratios to 2.76 and 7 TeV.” Journal of High Energy Physics 2017, 3 (March 2017): 156 © 2017 The Author(s)
Version
Final published version
Abstract
A measurement of the double-differential inclusive jet cross section as a function of the jet transverse momentum pT and the absolute jet rapidity |y| is presented. Data from LHC proton-proton collisions at √s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb⁻¹, have been collected with the CMS detector. Jets are reconstructed using the anti-kTclustering algorithm with a size parameter of 0.7 in a phase space region covering jet pTfrom 74 GeV up to 2.5 TeV and jet absolute rapidity up to |y| = 3.0. The low-pTjet range between 21 and 74 GeV is also studied up to |y| = 4.7, using a dedicated data sample corresponding to an integrated luminosity of 5.6 pb⁻¹. The measured jet cross section is corrected for detector effects and compared with the predictions from perturbative QCD at next-to-leading order (NLO) using various sets of parton distribution functions (PDF). Cross section ratios to the corresponding measurements performed at 2.76 and 7 TeV are presented. From the measured double-differential jet cross section, the value of the strong coupling constant evaluated at the Z mass is αS(MZ) = 0.1164[subscript − 0.0043][subscript + 0.0060], where the errors include the PDF, scale, nonperturbative effects and experimental uncertainties, using the CT10 NLO PDFs. Improved constraints on PDFs based on the inclusive jet cross section measurement are presented.[Figure not available: see fulltext.]
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP03(2017)156
