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Description
Abstract
The charm Yukawa coupling is one of the least constrained parameters of the Standard Model, making it an important target for testing the Higgs mechanism and searching for signs of physics beyond the Standard Model. The first half of this Collider Cross Talk will discuss the theoretical motivation for measuring the Higgs-charm interaction, including its role in probing the flavor structure of the Standard Model and its sensitivity to extensions such as Two-Higgs-Doublet Models and scenarios with vector-like quarks. The second half will present the experimental perspective, focusing on the recent CMS search for associated Higgs production with a charm quark in the diphoton channel. The analysis strategy, the challenges of charm tagging and background suppression, and the resulting constraints on the charm Yukawa coupling will be discussed, together with the prospects for future measurements at the High-Luminosity LHC.
Speakers
Tiziano Bevilacqua is an experimental particle physicist at ETH Zurich, working within the CMS collaboration at CERN. His research focuses on Higgs boson production and coupling measurements, with particular emphasis on the associated production of the Higgs boson with heavy-flavour quarks in the diphoton decay channel, as well as di-Higgs production in the four b-quark final state. He completed his PhD at the University of Zurich and the Paul Scherrer Institute in 2025, and previously held a research stay at the Max Planck Institute for Physics in Munich.
Uli Haisch is a theoretical particle physicist at the Max Planck Institute for Physics (Munich), working in high-energy phenomenology beyond the Standard Model. His research focuses on collider phenomenology relevant to the LHC, dark matter, effective field theory, flavor physics, and Higgs and top physics. He has held research and visiting positions at several leading institutions, including CERN, Fermilab, Johannes Gutenberg University Mainz, the University of Oxford, and the University of Zurich.