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T: Fachverband Teilchenphysik

T 24: Standard Model Physics II

T 24.4: Vortrag

Dienstag, 17. März 2026, 17:00–17:15, KH 00.014

Study of electroweak production of W(ℓν)γγ events in the Run-2 and Run-3 proton-proton collision data of the ATLAS detector. — •Sina Aktas, Gia Khoriauli, Raimund Ströhmer, and Thomas Trefzger — Julius-Maximilians-Universität Würzburg, Würzburg, Germany

Production of electroweak vector bosons provides a sensitive probe of the gauge interactions of the Standard Model, especially through the study of heavy gauge boson polarisation. The longitudinal polarisation of the W and Z bosons is of particular interest. The electroweak production of the Wγγ events in proton-proton collisions at the LHC is sensitive to triple and quartic electroweak gauge couplings and its study provides an opportunity to test the predictions of the electroweak theory.

We work on the development of analysis methods to measure differential cross sections and polarisation fractions of the W boson in the electroweak production of W(ℓν)γγ in the ATLAS detector. The analysis will use the full datasets of proton-proton collisions at the LHC at √s=13 TeV (Run-2) and √s=13.6 TeV (Run-3).

In this work, we discuss the current status of the study. The methods and preliminary results of the analysis based on Monte Carlo simulations are presented.

Keywords: W boson polarisation; quartic gauge couplings; Standard Model; LHC Run-2 Run-3; ATLAS experiment