Since the discovery of the Higgs boson by ATLAS and CMS, its measured properties and couplings to gauge bosons and third-generation fermions have been found to be consistent with Standard Model predictions. A key open question is the direct measurement of Higgs couplings to second-generation quarks, in particular the charm Yukawa coupling, which poses significant experimental challenges and relies on advanced techniques for jet reconstruction and flavour identification.
This seminar provides an overview of recent efforts at CMS, introducing modern jet flavour tagging methods and their application to Higgs boson measurements. Selected searches targeting decays to charm quark pairs (H→cc), which provide direct sensitivity to the charm Yukawa coupling, are highlighted.
Paolo Beltrame