Fig. 5: Reduced Higgs boson coupling strength modifiers and their uncertainties.
From: A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
They are defined as κFmF/vev for fermions (F = t, b, τ, μ) and \(\sqrt{{\kappa }_{V}}{m}_{V}/{\rm{vev}}\) for vector bosons as a function of their masses mF and mV. Two fit scenarios with κc = κt (coloured circle markers), or κc left free-floating in the fit (grey cross markers) are shown. Loop-induced processes are assumed to have the standard model (SM) structure, and Higgs boson decays to non-SM particles are not allowed. The vertical bar on each point denotes the 68% confidence interval. The p values for compatibility of the combined measurement and the SM prediction are 56% and 65% for the respective scenarios. The lower panel shows the values of the coupling strength modifiers. The grey arrow points in the direction of the best-fit value and the corresponding grey uncertainty bar extends beyond the lower panel range. Data are from ATLAS Run 2.