Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 3: Standard Model Physics I

T 3.5: Talk

Monday, March 16, 2026, 17:15–17:30, KH 00.014

Data-driven background estimation in EW VBF-Zjj ATLAS Analysis — •Simone Ruscelli — Technische Universität Dortmund (Germany)

Measurements exploiting weak vector-boson fusion (VBF) processes have become increasingly prominent at the Large Hadron Collider (LHC). Among these are studies of electroweak production of two jets in association with a weak boson (EW Vjj), a process highly sensitive to the VBF mechanism and to the gauge structure of the Standard Model, and potential anomalous weak-boson self-interactions. These measurements rely on precise theoretical predictions and Monte Carlo event generators, which are used to model electroweak processes, optimise event selections, and isolate the electroweak signal from dominant backgrounds. The results presented here employ the ABCD statistical method to estimate the strong-Zjj (QCD Zjj) background in signal-enriched regions, using fits to relevant kinematic distributions. The studies are based on √s = 13 TeV pp collision data collected by the ATLAS detector between 2015 and 2018.

Keywords: Z + jets (Zjj); Vector Boson Fusion (VBF); Standard Model (SM); ABCD method; Data-driven background estimation