SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 38: Heavy-Ion Collisions and QCD Phases VIII

HK 38.5: Talk

Wednesday, March 22, 2023, 16:45–17:00, SCH/A315

Search for QCD Instantons with the ATLAS Detector — •Radek Vavricka and Matthias Schott for the ATLAS collaboration — Johannes Gutenberg University Mainz

The Standard Model of particle physics predicts the existence of quantum tunnelling processes across topological inequivalent vacua, known as Instantons. In the*electroweak sector, instantons provide a source of baryon asymmetry within the Standard Model. In Quantum Chromodynamics they are linked to chiral symmetry*breaking and confinement. So far, no direct experimental evidence of instanton-induced processes has been found. Recently, new calculations for QCD Instanton processes in proton-proton collisions became public, suggesting promising experimental signatures at the LHC. In this work, we give an update on the ongoing searches for instanton signatures with the ATLAS Detector.