Measurement of the semileptonic t[¯ over t] + γ production cross section in pp collisions at √s=8 TeV
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Sirunyan2017_Article_MeasurementOfTheSemileptonicTt.pdf
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Author(s)
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Azzolini, Virginia
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Date Issued
October 2017
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
The CMS collaboration, et al. “Measurement of the Semileptonic t[¯ over t] $$ + γ Production Cross Section in Pp Collisions at √s = 8 TeV.” Journal of High Energy Physics, vol. 2017, no. 10, Oct. 2017. © 2017 The Authors
Version
Final published version
Abstract
A measurement of the cross section for top quark-antiquark (t[¯ over t) pairs produced in association with a photon in proton-proton collisions at s=8 TeV is presented. The analysis uses data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.7 fb[superscript 1]. The signal is defined as the production of a t[¯ over t] pair in association with a photon having a transverse energy larger than 25 GeV and an absolute pseudorapidity smaller than 1.44. The measurement is performed in the fiducial phase space corresponding to the semileptonic decay chain of the t[¯ over t] pair, and the cross section is measured relative to the inclusive t[¯ over t] pair production cross section. The fiducial cross section for associated t[¯ over t] pair and photon production is found to be 127 ±27 (stat+syst) fb per semileptonic final state. The measured value is in agreement with the theoretical prediction. Keywords: Hadron-Hadron scattering (experiments), Top physics
MIT Department
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/JHEP10(2017)006
