The potential of Higgs factories

Precision measurements of the Higgs boson provide a powerful pathway to explore the nature of electroweak symmetry breaking, including the possible discovery of physics beyond the standard model. With small backgrounds and unprecedented detectors, electron-positron Higgs factories can probe the Higgs boson at new levels of sensitivity. Model-independent determinations of couplings and other parameters will test a variety of new physics scenarios. The linear collider and circular e+e-colliders are possible realizations for this opportunity.