Measurement of the Mass Difference Between Top Quark and Antiquark in pp Collisions At √s=8 TeV
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Author(s)
CMS Collaboration
Apyan, Aram
Barbieri, Richard Alexander
Bauer, Gerry P
Busza, Wit
Cali, Ivan Amos
Di Matteo, Leonardo
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
April 2017
Journal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S. et al. “Measurement of the Mass Difference Between Top Quark and Antiquark in pp Collisions At √s=8 TeV.” Physics Letters B 770 (July 2017): 50–71 © 2017 The Author(s)
Version
Final published version
Abstract
The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Δmt=mt−mt‾) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb⁻¹ collected by the CMS experiment at the LHC, and yields a value of Δmt=−0.15±0.19(stat)±0.09(syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements. Keywords: CMS; Top quark physics
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/10.1016/J.PHYSLETB.2017.04.028
