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Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector

  • (ATLAS Collaboration)
  • Aix-Marseille Université
  • University of Oklahoma
  • University of Massachusetts
  • University of Göttingen
  • United States Department of Energy
  • Mohammed V University in Rabat
  • Tel Aviv University
  • Technion-Israel Institute of Technology
  • New York University
  • Pontificia Universidad Católica de Chile
  • National Institute for Nuclear Physics
  • Abdus Salam International Centre for Theoretical Physics
  • King's College London
  • Johannes Gutenberg University Mainz
  • Université Savoie Mont Blanc
  • AGH University of Krakow
  • University of Toronto
  • Brandeis University
  • Northern Illinois University
  • Istanbul University
  • University of Geneva
  • Rutherford Appleton Laboratory
  • University of California at Santa Cruz
  • CERN
  • Institute for High Energy Physics
  • University of Pavia
  • Alexandru Ioan Cuza University of Iaşi
  • University of Granada
  • Azerbaijan National Academy of Sciences
  • McGill University
  • Royal Holloway University of London
  • German Electron Synchrotron
  • University of Rome Tor Vergata
  • Weizmann Institute of Science
  • Lund University
  • Columbia University
  • University of Victoria BC
  • Universidad Nacional de La Plata

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

This Letter reports the observation of single top quarks produced together with a photon, which directly probes the electroweak coupling of the top quark. The analysis uses Formula Presented of 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. Requiring a photon with transverse momentum larger than 20 GeV and within the detector acceptance, the fiducial cross section is measured to be Formula Presented, to be compared with the standard model prediction of Formula Presented at next-to-leading order in QCD.

Original languageEnglish
Article number181901
JournalPhysical Review Letters
Volume131
Issue number18
DOIs
StatePublished - Nov 3 2023

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