Search for CP violation using $ \textrm{t}\overline{\textrm{t}} $ events in the lepton+jets channel in pp collisions at $ \sqrt{s} $ = 13 TeV
(2023) Journal of High Energy Physics — Vol. 06 (2023)
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- Abstract
- Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at $ \sqrt{s} $ = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb$^{−1}$. Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04 ± 0.10 (stat) ± 0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.[graphic not available: see fulltext]
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Benecke, A., Bethani, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Jaffel, K., Jain, S., Jain, S., Lemaitre, V., Mondal, K., Prisciandaro, J., Taliercio, A., Teklishyn, M., Tran, T. T., Vischia, P., et al. (2023). Search for CP violation using $ \textrm{t}\overline{\textrm{t}} $ events in the lepton+jets channel in pp collisions at $ \sqrt{s} $ = 13 TeV. Journal of High Energy Physics, 06. https://doi.org/10.1007/JHEP06(2023)081 (Original work published 2023)