Search for CP violation in tt¯ production and decay in proton-proton collisions at s√=8 TeV
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Issue Date
2017-03-20Author
CMS Collaboration
Publisher
Springer Verlag
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
© The Author(s) 2017
Metadata
Show full item recordAbstract
The results of a first search for CP violation in the production and decay of top quark-antiquark ( tt¯ ) 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−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 tt¯ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.
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Citation
The CMS collaboration, Khachatryan, V., Sirunyan, A.M. et al. J. High Energ. Phys. (2017) 2017: 101. https://doi.org/10.1007/JHEP03(2017)101
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