@misc{10481/86034,
year = {2023},
month = {10},
url = {https://hdl.handle.net/10481/86034},
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.},
organization = {ANPCyT, Argentina},
organization = {YerPhI, Armenia},
organization = {ARC, Australia},
organization = {BMWFW and FWF, Austria},
organization = {ANAS, Azerbaijan},
organization = {CNPq and FAPESP, Brazil},
organization = {NSERC, NRC, and CFI, Canada},
organization = {CERN},
organization = {ANID, Chile},
organization = {CAS, MOST, and NSFC, China},
organization = {Minciencias, Colombia},
organization = {MEYS CR, Czech Republic},
organization = {DNRF and DNSRC, Denmark},
organization = {IN2P3-CNRS and CEA-DRF/IRFU, France},
organization = {SRNSFG, Georgia},
organization = {BMBF, HGF, and MPG, Germany},
organization = {GSRI, Greece},
organization = {RGC and Hong Kong SAR, China},
organization = {ISF and Benoziyo Center, Israel},
organization = {INFN, Italy},
organization = {MEXT and JSPS, Japan},
organization = {CNRST, Morocco},
organization = {NWO, Netherlands},
organization = {RCN, Norway},
organization = {MEiN, Poland},
organization = {FCT, Portugal},
organization = {MNE/IFA, Romania},
organization = {MESTD, Serbia},
organization = {MSSR, Slovakia},
organization = {ARRS and MIZŠ, Slovenia},
organization = {DSI/NRF, South Africa},
organization = {MICINN, Spain},
organization = {SRC and Wallenberg Foundation, Sweden},
organization = {SERI, SNSF, and Cantons of Bern and Geneva, Switzerland},
organization = {MOST, Taiwan},
organization = {TENMAK, Türkiye},
organization = {STFC, United Kingdom},
organization = {DOE and NSF, USA},
organization = {BCKDF, CANARIE, Compute Canada, and CRC, Canada},
organization = {PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic},
organization = {COST, ERC, ERDF, Horizon 2020, and Marie Skłodowska-Curie Actions,
European Union},
organization = {Investissements d’Avenir Labex, Investissements d’Avenir Idex, and ANR, France},
organization = {DFG and AvH Foundation, Germany},
organization = {Herakleitos, Thales, and Aristeia programs cofinanced by EU-ESF and the Greek},
organization = {NSRF, Greece},
organization = {BSF-NSF and MINERVA, Israel},
organization = {Norwegian Financial Mechanism 2014-2021, Norway},
organization = {NCN and NAWA, Poland},
organization = {La Caixa Banking Foundation, CERCA Programme Generalitat de
Catalunya},
organization = {PROMETEO and GenT Programmes
Generalitat Valenciana, Spain},
organization = {Göran Gustafssons Stiftelse, Sweden},
organization = {The Royal Society and Leverhulme Trust, United Kingdom},
organization = {CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada)},
organization = {NDGF (Denmark, Norway, Sweden)},
organization = {CC-IN2P3 (France)},
organization = {KIT/GridKA (Germany)},
organization = {INFN-CNAF (Italy)},
organization = {NL-T1 (Netherlands)},
organization = {PIC (Spain)},
organization = {ASGC (Taiwan)},
organization = {RAL (UK)},
organization = {BNL (USA)},
publisher = {American Physical Society},
title = {Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector},
doi = {10.1103/PhysRevLett.131.181901},
author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Rodríguez Chala, Mikael and Atlas Collaboration},
}