Heidelberg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 29: Invited Topical Talks 2

T 29.1: Eingeladener Vortrag

Dienstag, 22. März 2022, 14:00–14:25, T-H16

Testing the Standard Model through Gauge-boson Self-interactions — •Philip Sommer — The University of Sheffield, Sheffield, United Kingdom; CERN, Geneva, Switzerland

In the Standard Model, electroweak interactions of fermions proceed through the exchange of gauge bosons, the W and Z bosons, and the photon. In addition, self-interactions of the gauge bosons through trilinear and quartic couplings are predicted. At the LHC, these lead to the production of single- and multiboson final states. Measurements of such processes, thus, provide a sensitive probe of the gauge structure of the electroweak theory. The pp collision data from the second experimental phase of the LHC has allowed for precise measurements of processes proceeding through trilinear couplings and facilitated, for the first time, the observation of a number of processes that proceed through quartic electroweak couplings. Recent measurements of single- and multi-boson production by the ATLAS collaboration are presented. The agreement of the measurements with the theoretical predictions is quantified by constraining Effective Field Theory operators that modify the trilinear and quartic gauge-boson self-interactions in a general extension of the Standard Model.