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 √ 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.

Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2023). Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6), 0-46 [10.1007/JHEP06(2023)081].

Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV

Battilana, C.;Bonacorsi, D.;Borgonovi, L.;Castro, A.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Lunerti, L.;Rovelli, T.;Siroli, G. P.;
2023

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 √ 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.
2023
Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2023). Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6), 0-46 [10.1007/JHEP06(2023)081].
Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Escalante Del Valle, A.; Frühwirth, R.; Jeitl...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/954018
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