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T: Fachverband Teilchenphysik

T 25: Higgs Physics III

T 25.3: Talk

Tuesday, March 17, 2026, 16:45–17:00, KH 00.016

Measurement of H→γγ fiducial cross sections with 13.6 TeV CMS data — •Caio Daumann, Johannes Erdmann, Linus Erdmann, Jan Lukas Späh, and Maximilian Wrabetz — RWTH Aachen, Physikalisches Institut III A

The Higgs boson is of fundamental importance for the understanding of particle physics. Since its discovery in 2012, it has been studied extensively by the ATLAS and CMS collaborations. The measurement of Higgs boson production cross sections is crucial for studying deviations from the Standard Model (SM) in the scalar sector.

In this presentation, the developments and current status of the Run 3 H→γγ fiducial cross-section measurement are presented. With the increasing amount of data collected by the CMS experiment, these measurements are able to precisely test the SM and set constraints on scenarios beyond the SM. Effective Field Theory (EFT) and light-quark Yukawa coupling interpretations of these measurements are presented.

Special emphasis is placed on the statistical analysis, interpretations, and the new methods employed. In particular, the implementation and impact of the main systematic uncertainties are discussed, which become increasingly relevant with the unprecedented amount of data provided by the LHC during Run 3.

Keywords: Higgs Boson; Effective field Theory; Yukawa Couplings