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T: Fachverband Teilchenphysik

T 25: Higgs Physics III

T 25.8: Talk

Tuesday, March 17, 2026, 18:00–18:15, KH 00.016

Combined measurements of the Higgs boson at ATLAS — •Ahmed Markhoos, Benedict Winter, and Karl Jakobs — University of Freiburg, Freiburg im Breisgau, Germany

Statistical combinations provide the cutting edge results for processes that can be studied through different signatures. Notable examples at the LHC have been measurements of Higgs boson production and decays. In this talk, I present the status of the latest combination of the Higgs boson measurements, performed by the ATLAS experiment with the Run 2 dataset spanning two main subjects. The first are measurements of the overall products of the Higgs-boson cross-sections and branching ratios, as well as a measurement performed in the Simplified Template Cross-section scheme, showcasing sensitivity gains in challenging parts of the phase space that may feature first hints of physics beyond the Standard Model. The second are interpretations of these measurements with the Kappa framework, which compares the measured coupling properties with those predicted by the Standard Model, and via Effective Field theory exploring possible couplings beyond the Standard Model.

Keywords: Higgs; Combination; Kappa; EFT; Coupling