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Search for CP violation in tt¯ production and decay in proton-proton collisions at s√=8 TeV
CMS Collaboration
CMS Collaboration
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Abstract
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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Date
2017-03-20
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Springer Verlag
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Keywords
CP violation, Hadron-Hadron scattering (experiments), Top physics
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