Speaker
Description
We propose a model-independent approach to test for CP (Charge-Parity)-violation in the scalar sector. We simply extend the Standard Model (SM) by introducing a heavy neutral scalar particle and the couplings of $h_2VV$ ($V = W^{\pm}, Z$) and $h_2h_1Z$ vertices, where $h_1, h_2$ stand for the 125 GeV SM Higgs boson and the heavy neutral scalar particle we add respectively. This is possible at the future muon collider by exploiting $h_2$ production from Vector-Boson Fusion (VBF) and decay to $h_1Z$. When the coupling parameters at the vertices $h_2VV$ ($V = W^{\pm}, Z$) and $h_2h_1Z$ are both nonzero, CP-violation exists in the scalar sector. We simulate the signal and backgrounds for the processes mentioned above at the future muon colliders with the $\sqrt{s}$ = 10 TeV (3 TeV) and the integrated luminosity of 10 ab$^{-1}$ (0.9 ab$^{-1}$). Finally, we provided the discovery potential of CP-violation under different coupling parameters.
