Search for CP violation using events in the lepton+jets channel in pp collisions at = 13 TeV
arXiv:2205.02314 · doi:10.1007/JHEP06(2023)081
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. 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 0.10 (stat) 0.07 (syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.
arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-20-005 (CMS Public Pages)
References in corpus (26)
- The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
- The anti-k_t jet clustering algorithm
- An Introduction to PYTHIA 8.2
- FastJet user manual
- A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
- A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
- Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
- LHAPDF6: parton density access in the LHC precision era
- Parton distributions from high-precision collider data
- Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
- Merging meets matching in MC@NLO
- Identification of b-quark jets with the CMS experiment
- Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
- String Formation Beyond Leading Colour
- High-precision differential predictions for top-quark pairs at the LHC
- Top-pair production at the LHC through NNLO QCD and NLO EW
- Top-pair production and decay at NLO matched with parton showers
- CP Violation in Top Physics
- Effects of color reconnection on final states at the LHC
- Top-quark pair production at the LHC: Fully differential QCD predictions at NNLO
- Top quark spin correlations and polarization at the LHC: standard model predictions and effects of anomalous top chromo moments
- CP violating anomalous top-quark couplings at the LHC
- CP violation and the CKM matrix
- CP-odd correlations using jet momenta from tt_bar events at the Tevatron
- Commissioning of the CMS High-Level Trigger with Cosmic Rays
- T-odd correlations from top-quark CEDM in lepton plus jets top-pair events