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 / Betti, A., DE SALVO, A., Di Domenico, Antonio., Dionisi, Carlo., Bini, C., Luci, C., Morodei, F., Lacava, F., SAFAI TEHRANI, F., Artoni, G., Santi, L., Padovano, G., Martinelli, L., Maiani, L., Bauce, M., Gauzzi, P., Gentile, S., Giagu, S., Ippolito, V.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:18(2023), pp. 1-35. [10.1103/PhysRevLett.131.181901]
Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector
Betti Alessandra;De Salvo Alessandro;Di Domenico Antonio.;Dionisi Carlo.;Bini Cesare;Luci Claudio;Morodei Federico;Lacava Francesco;Safai Tehrani Francesco;Artoni Giacomo;Santi Lorenzo;Padovano Giovanni;Martinelli Luca;Maiani Luciano;Bauce Matteo;Gauzzi Paolo;Gentile Simonetta;Giagu Stefano;Ippolito Valerio
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.| File | Dimensione | Formato | |
|---|---|---|---|
|
Aad_Observation_2023.pdf
accesso aperto
Note: Articolo su rivista
Tipologia:
Documento in Post-print (versione successiva alla peer review e accettata per la pubblicazione)
Licenza:
Creative commons
Dimensione
1.47 MB
Formato
Adobe PDF
|
1.47 MB | Adobe PDF |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
