Search for CP violation in t[bar over t¯] production and decay in proton-proton collisions at √s=8 TeV
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Khachatryan2017_Article_SearchForCPViolationInTtTOverl.pdf
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Author(s)
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Date Issued
March 2017
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
The CMS collaboration, et al. “Search for CP Violation in t[bar over t ¯] Production and Decay in Proton-Proton Collisions at √s = 8 TeV.” Journal of High Energy Physics, vol. 2017, no. 3, Mar. 2017. © 2017, The Author(s).
Version
Final published version
Abstract
The results of a first search for CP violation in the production and decay of top quark-antiquark (t[bar over t]) pairs are presented. The search is based on asymmetries in T-odd, triple-product correlation observables, where T is the time-reversal operator. The analysis uses a sample of proton-proton collisions at √s=8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb[superscript −1]. Events are selected having one electron or muon and at least four jets. The T-odd observables are measured using four-momentum vectors associated with t[bar over t] production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model. Keywords: CP violation, Hadron-Hadron scattering (experiments), Top physics
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP03(2017)101
