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



Aad, G ORCID: 0000-0002-6665-4934, Abbott, B, Abbott, DC, Abeling, K, Abidi, SH, Aboulhorma, A ORCID: 0000-0002-9987-2292, Abramowicz, H ORCID: 0000-0001-5329-6640, Abreu, H ORCID: 0000-0002-1599-2896, Abulaiti, Y ORCID: 0000-0003-0403-3697, Abusleme Hoffman, AC
et al (show 2896 more authors) (2023) Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector. Physical review letters, 131 (18). 181901-.

Access the full-text of this item by clicking on the Open Access link.

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.

Item Type: Article
Uncontrolled Keywords: ATLAS Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 06 Nov 2023 15:45
Last Modified: 13 Feb 2024 09:07
DOI: 10.1103/physrevlett.131.181901
Open Access URL: https://journals.aps.org/prl/abstract/10.1103/Phys...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3176657