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: 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 / Aad, G., Abbott, B., Abbott, D.C., Abeling, K., Abidi, S.H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A.C., Acharya, B.S., Achkar, B., Adam, L., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Addepalli, S.V., Adelman, J., Adiguzel, A., Adorni, S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:18(2023). [10.1103/PhysRevLett.131.181901]

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

Follega, F M;Iuppa, R;Ricci, E;
2023-01-01

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
PHYSICAL REVIEW LETTERS
18
37977601
2-s2.0-85179841715
WOS:001094321900001
Aad, G; Abbott, B; Abbott, D C; Abeling, K; Abidi, S H; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Abusleme Hoffman, A C; Acharya, B S; Achk...espandi
Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector / Aad, G., Abbott, B., Abbott, D.C., Abeling, K., Abidi, S.H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A.C., Acharya, B.S., Achkar, B., Adam, L., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Addepalli, S.V., Adelman, J., Adiguzel, A., Adorni, S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:18(2023). [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/11572/412613
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