: 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.

Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector / Add, G.; Aloisio, A.; Alviggi, M.; Auricchio, S.; Canale, V.; Cirotto, F.; Della Pietra, M.; Merola, L.; Massarotti, P.; Rossi, E.; Conventi, F.; Izzo, V.; Sekhniaidze, G. G.; Camerlingo, M. T.; Iengo, P.; Di Donato, C.; De Asmundis, R.; Carlino, G.; Doria, A.; Al, Et. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:18(2023), p. 181901. [10.1103/PhysRevLett.131.181901]

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

A. Aloisio;M. Alviggi;S. Auricchio;V. Canale;F. Cirotto;M. Della Pietra;L. Merola;P. Massarotti;E. Rossi;LOFFREDO, Salvatore
2023

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) _{-71}^{+75}(syst)  fb, to be compared with the standard model prediction of 515_{-42}^{+36}  fb at next-to-leading order in QCD.
2023
Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector / Add, G.; Aloisio, A.; Alviggi, M.; Auricchio, S.; Canale, V.; Cirotto, F.; Della Pietra, M.; Merola, L.; Massarotti, P.; Rossi, E.; Conventi, F.; Izzo, V.; Sekhniaidze, G. G.; Camerlingo, M. T.; Iengo, P.; Di Donato, C.; De Asmundis, R.; Carlino, G.; Doria, A.; Al, Et. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:18(2023), p. 181901. [10.1103/PhysRevLett.131.181901]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/953146
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