Search for CP violation using $\mathrm{t\bar{t}}$ events in the lepton+jets channel in pp collisions at $\sqrt{s}$ = 13 TeV

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.