Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 3: Standard Model Physics I

T 3.6: Talk

Monday, March 16, 2026, 17:30–17:45, KH 00.014

Improvement of Parton Distribution Functions through the ATLAS W-boson Measurement at High Transverse Masses — •Luca Nicastro, Tim Frederik Beumker, Frank Ellinghaus, and Johanna Wanda Kraus — Bergische Universität Wuppertal

High-precision measurements of W bosons at large transverse masses offer sensitivity to the proton*s parton distribution functions (PDFs), particularly in the high Bjorken-x region. In this work, the impact of the recently published ATLAS Run-2 measurement of double-differential charged-current Drell-Yan cross sections at √s=13 TeV is investigated. Using the xFitter framework, the study assesses how this dataset can refine existing PDF sets through profiling. Different analysis strategies, including the treatment of lepton channels, the choice between additive and multiplicative electroweak corrections, and the use of charge asymmetries, are systematically compared. The results demonstrate which configurations yield the strongest quantitative constraints on specific PDF components and illustrate these constraints.

Keywords: parton distribution functions (PDFs); double-differential charged-current Drell-Yan