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

CMS Collaboration

Preprint

PUBDB-2022-04478

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

CMS Collaboration (Collaboration author)DESY*

2022

[10.3204/PUBDB-2022-04478]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2022-04478

Report No.: CERN-EP-2022-051; CMS-TOP-20-005; arXiv:2205.02314

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 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb$^{-1}$. Possible CP violation effects are evaluated by measuring uncorrected 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 $\pm$ 0.10 (stat) $\pm$ 0.07 (syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.

Keyword(s): p p: colliding beams ; CP: violation ; p p: scattering ; top: pair production ; top: decay ; asymmetry: CP ; final state: ((n)jet lepton) ; moment: dipole ; dipole: chromoelectric ; CERN LHC Coll ; CMS ; data analysis method ; experimental results ; 13000 GeV-cms

Note: Submitted to the Journal of High Energy Physics. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-20-005 (CMS Public Pages)

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