Observation of four top quark production in proton-proton collisions at = 13 TeV
arXiv:2305.13439 · doi:10.1016/j.physletb.2023.138290
Abstract
The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016-2018 at the CERN LHC and corresponding to an integrated luminosity of 138 fb. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7 (stat) (syst) fb, in agreement with the available standard model predictions.
Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-22-013 (CMS Public Pages)
References in corpus (16)
- An Introduction to PYTHIA 8.2
- Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
- Particle-flow reconstruction and global event description with the CMS detector
- Single-top Wt-channel production matched with parton showers using the POWHEG method
- Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
- Precision luminosity measurement in proton-proton collisions at 13 TeV in 2015 and 2016 at CMS
- Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC
- Jet Flavour Classification Using DeepJet
- Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at 13 TeV
- Evidence for production in the multilepton final state in proton-proton collisions at =13 TeV with the ATLAS detector
- Observation of four-top-quark production in the multilepton final state with the ATLAS detector
- Limiting Top-Higgs Interaction and Higgs-Boson Width from Multi-Top Productions
- Top-philic heavy resonances in four-top final states and their EFT interpretation
- Probing top-philic sgluons with LHC Run I data
- Four-top quark physics at the LHC
- On the BSM reach of four top production at the LHC
Cited by in corpus (16)
- The CMS statistical analysis and combination tool: COMBINE
- Anomalies in Particle Physics
- Dispelling the myth for the High-Luminosity LHC
- Search for top-philic heavy resonances in collisions at TeV with the ATLAS detector
- Attention to the strengths of physical interactions: Transformer and graph-based event classification for particle physics experiments
- Mutually elusive: vectorlike antileptons and leptoquarks
- Third-generation-philic Hidden Naturalness
- Muon identification using multivariate techniques in the CMS experiment in proton-proton collisions at = 13 TeV
- Naturalness-motivated composite Higgs model for generating the top Yukawa coupling
- Search for production in proton-proton collisions at TeV with the ATLAS detector
- is all you need: production of multiple semi-invisible resonances at hadron colliders
- Five-flavour scheme predictions for at next-to-leading order accuracy
- Modelling top-quark decays in production at the LHC
- Machine learning in top quark physics at ATLAS and CMS
- : NLO QCD corrections in production and decays for the channel
- Observation of tWZ production at the CMS experiment