Measurement of the integrated and differential t[bar over t] production cross sections for high- pT top quarks in pp collisions at √s = 8 TeV
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Author(s)
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Demiragli, Zeynep
Di Matteo, Leonardo
Alternative Title
Measurement of the integrated and differential t ¯ t production cross sections for high- pT top quarks in pp collisions at √s = 8 TeV
Date Issued
October 2016
Journal
Physical Review D
Publisher
American Physical Society
Citation
Khachatryan, V. et al. “Measurement of the Integrated and Differential T[bar over T] Production Cross Sections for High-PT Top Quarks in P P Collisions at √S = 8 TeV.” Physical Review D 94.7 (2016): n. pag. © 2016 CERN for the CMS Collaboration
Version
Final published version
Abstract
The cross section for pair production of top quarks (t[bar over t]) with high transverse momenta is measured in p collisions, collected with the CMS detector at the LHC with √s = 8 TeV in data corresponding to an integrated luminosity of 19.7 fb [superscript -1]. The measurement is performed using lepton + jets events, where one top quark decays semileptonically, while the second top quark decays to a hadronic final state. The hadronic decay is reconstructed as a single, large-radius jet, and identified as a top quark candidate using jet substructure techniques. The integrated cross section and the differential cross sections as a function of top quark pT and rapidity are measured at particle level within a fiducial region related to the detector-level requirements and at parton level. The particle-level integrated cross section is found to be σ[subscript t[bar over t]] = 0.499
± 0.035 (stat + syst) ± 0.095 (theo) ± 0.013 (lumi) pb
for top quark pT > 400 GeV. The parton-level measurement is σ[subscript t[bar over t]] = 1.44 ± 0.10 (stat + syst) ± 0.29 (theo) ± 0.04 (lumi) pb. The integrated and differential cross section results are compared to predictions from several event generators.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 3.0 Unported license
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.94.072002
