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Oxana Smirnova

Oxana Smirnova

Senior Lecturer, Deputy Head of division

Oxana Smirnova

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

Author

  • G. Aad
  • T.P.A. Åkesson
  • Eric Edward Corrigan
  • Caterina Doglioni
  • Alexander Ekman
  • Jannik Geisen
  • Vincent Hedberg
  • Göran Jarlskog
  • Balazs Konya
  • Else Lytken
  • Katja Mankinen
  • Caterina Marcon
  • Ulf Mjörnmark
  • Geoffrey André Adrien Mullier
  • Ruth Pöttgen
  • Nathan Daniel Simpson
  • Eleni Skorda
  • Oxana Smirnova
  • L. Zwalinski

Summary, in English

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 139 fb^{-1} 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 688±23(stat) _{-71}^{+75}(syst) fb, to be compared with the standard model prediction of 515_{-42}^{+36} fb at next-to-leading order in QCD.

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration
  • Department of Physics

Publishing year

2023

Language

English

Publication/Series

Physical Review Letters

Volume

131

Issue

18

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Keywords

  • article
  • human
  • photon
  • quark

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114