Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 8: Top Physics I (tt+X)
T 8.1: Vortrag
Montag, 31. März 2025, 16:45–17:00, VG 1.103
Measurement of the associated production of top quark pairs with a photon at √s=13.6 TeV with the ATLAS detector — Diptaparna Biswas1, Beatrice Cervato1, Markus Cristinziani1, Carmen Diez Pardos1, Ivor Fleck1, Arpan Ghosal1, Gabriel Gomes1, •Jan Joachim Hahn1, Vadim Kostyukhin1, Nils Krengel1, Buddhadeb Mondal1, Stefanie Müller1, Sebastian Rentschler1, Elisabeth Schopf1, Katharina Voss1, Wolfgang Walkowiak1, Adam Warnerbring1, and Tongbin Zhao1,2 — 1Experimentelle Teilchenphysik, Center for Particle Physics Siegen, Universität Siegen — 2Shandong University, China
The production of top quark pairs in association with a photon (ttγ) is an important process to investigate the coupling between the photon and the top quark. Precise measurements of this interaction allow testing the Standard Model (SM) and set limits on physics beyond the SM phenomena which affect the electroweak couplings of the top quark. The increased centre-of-mass energy of 13.6 TeV and luminosity of the ongoing LHC Run 3 allow for more precise measurement of this process, compared to the recent result for Run 2. In this talk, the ongoing measurement of the ttγ production using Run 3 data taken with the ATLAS experiment is presented, including first data-driven measurements of relevant background processes.
Keywords: Top Quark; Photon; ATLAS