2021/07/04 by CMS Collaboration, A. Tumasyan, W. Adam +191 · 1 citation
Mathematics · Physics and Astronomy · #Bar (unit) #Channel (broadcasting) #Charged particle #Computer science #Differential (mechanical device) #Electron #Galaxy #Hadronization #High-Energy Particle Collisions Research #Interpretation (philosophy) #Large Hadron Collider #Lepton #Linguistics #Luminosity #Mathematics #Neutrino Physics Research #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Philosophy #Physics #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Standard Model (mathematical formulation) #Telecommunications #Top quark #hep-ex
paper · pdf · doi:10.1007/jhep12(2021)180
published in CERN Document Server (European Organization for Nuclear Research) 2021(12), 1-50 (European Organization for Nuclear Research) · Replaced with the published version. Added the journal reference and DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-18-010 (CMS Public Pages)
openalex publication_date 2021/07/04 · arxiv created 2021/12/29 · arxiv updated 2021/12/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
The production cross section of a top quark pair in association with a photon is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The data set, corresponding to an integrated luminosity of 137 fb-1, was recorded by the CMS experiment during the 2016-2018 data taking of the LHC. The measurements are performed in a fiducial volume defined at the particle level. Events with an isolated, highly energetic lepton, at least three jets from the hadronization of quarks, among which at least one is b tagged, and one isolated photon are selected. The inclusive fiducial \mathrmttγ cross section, for a photon with transverse momentum greater than 20 GeV and pseudorapidity |η| < 1.4442, is measured to be 800 ± 7 (stat) ± 46 (syst) fb, in goo d agreement with the prediction from the standard model at next-to-leading order in quantum chromodynamics. The differential cross sections are also measured as a function of several kinematic observables and interpreted in the framework of the standard model effective field theory (EFT), leading to the most stringent direct limits to date on anomalous electromagnetic dipole moment interactions of the top quark and the photon.