Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 20: Higgs 1 (boson final states)
T 20.1: Vortrag
Montag, 4. März 2024, 16:00–16:15, Geb. 30.41: HS 2
Higgs Boson Production Cross-section Measurements at √s=13.6 TeV in the H → ZZ* → 4l Channel With the ATLAS Detector — •Alice Reed, Sandra Kortner, and Oliver Kortner — Max Planck Institut für Physik, München
An important process for the measurement of Higgs boson properties is the Higgs boson decay into two Z bosons, which subsequently decay into a µ+µ− or e+e− pair, H → ZZ* → 4l. Due to its clear signature, this decay channel can be studied with the first Run 3 collision data collected with the ATLAS detector in 2022 and 2023, providing measurements at a new centre-of-mass energy of √s = 13.6 TeV.
To reduce the model dependence, the cross-section for this process is measured in a fiducial phase space which closely matches the detector-level kinematic selection and is corrected for detector effects. The inclusive fiducial cross-section measured using the 2022 ATLAS dataset, corresponding to 29.0 fb−1, is in agreement with the corresponding Standard Model prediction. Expanding upon this measurement, differential fiducial cross-section measurements for observables sensitive to the Higgs boson production and decay can also be performed. Strategies for upcoming differential fiducial cross-section measurements with 56 fb−1 of data from the ATLAS detector in 2022 and 2023 will be presented.
Keywords: Higgs; ATLAS; lepton; boson; cross-section