Ferrando, James (2023) Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector. Physical review letters, 131 (18): 181901. ISSN 1079-7114
Full text not available from this repository.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 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 ) + 75 − 71 ( syst ) fb , to be compared with the standard model prediction of 515 + 36 − 42 fb at next-to-leading order in QCD.