Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 20: Higgs 1 (boson final states)

T 20.4: Talk

Monday, March 4, 2024, 16:45–17:00, Geb. 30.41: HS 2

First measurement of H → γ γ fiducial cross sections with 13.6 TeV CMS data — Caio Daumann, Johannes Erdmann, Nitish Kumar, Florian Mausolf, and •Jan Lukas Späh — III. Physikalisches Institut A, RWTH Aachen University

The Higgs boson, which is of fundamental interest for the understanding of matter, has been studied in detail by the ATLAS and CMS collaborations since its discovery in 2012. Measurements of Higgs boson production cross sections are important to probe possible beyond the standard model effects in the scalar sector.

In this talk, the measurement of Higgs boson production cross sections in the diphoton decay channel at √s=13.6 TeV based on a sample of proton-proton collision data collected in 2022 with the CMS experiment is presented. This analysis benefits from the clean topology of the diphoton decay channel. The cross sections are measured in a fiducial phase space at particle level, reducing extrapolation uncertainties and enhancing the model independence of the measurement. In this talk, special emphasis is placed on the statistical analysis, which includes the simulation-based signal modelling and the data-driven background modelling.

This analysis lays the foundation for further measurements of Higgs boson processes in the diphoton decay channel by the CMS collaboration in Run 3 of the LHC and beyond.

Keywords: Higgs boson; Photon; Cross section