Learning from Higgs Physics at Future Higgs Factories

by Prof. Shufang Su (University of Arizona)

Tuesday 11 Sep 2018, 15:00 → 16:30 Asia/Shanghai

B105 (CHEP)

Future Higgs factories can reach impressive precision on Higgs property measurements. In this talk, we explore its sensitivity to new physics models at the electron-positron colliders. We illustrate this by focusing on the Type-II two Higgs doublet model. We include the contributions from the heavy Higgs bosons at the tree-level and at the one-loop level in a full model-parameter space. We perform a multiple variable global fit to various Higgs search channels to obtain the 95%C.L. constraints on the model parameter space. In particular, we study the extent to which the parameters of non-alignment and non-degenerate masses can be probed by the precision measurements. We find that the allowed parameter ranges are tightly constrained by the future Higgs precision measurements, especially for small and large values of tanβ. Indirect limits on the masses of heavy Higgs can be obtained, which can be complementary to the direct searches of the heavy Higgs bosons at hadron colliders. We also find that the expected accuracies at the Z-pole and at a Higgs factory are quite complementary in constraining mass splittings of heavy Higgs bosons. We also compare the sensitivity of various future Higgs factories, namely Circular Electron Positron Collider (CEPC), Future Circular Collider (FCC)-ee and International Linear Collider (ILC)