Constraining the charm Yukawa and Higgs-quark coupling universality

We introduce four different types of data-driven analyses with different levels of robustness that constrain the size of the Higgs–charm Yukawa coupling: (i)Recasting the vector-boson associated Vh analyses that search for the bottom-pair final state. We use this mode to directly and model independently constrain the Higgs-to-charm coupling, yc/ySMc≲234. (ii) The direct measurement of the total width, yc/ySMc≲120–140. (iii) The search for h→J/ψγ, yc/ySMc≲220. (iv) A global fit to the Higgs signal strengths, yc/ySMc≲6.2. A comparison with tt h data allows us to show that the Higgs does not couple to quarks in a universal way, as is expected in the Standard Model. Finally, we demonstrate how the experimental collaborations can further improve our direct bound by roughly an order of magnitude by charm tagging, as is already used in new-physics searches.