Speaker
Description
A Search and measurement at Circular Electron Positron Collider (CEPC) is reported for Higgs Boson rare decay to $\mu^+\mu^-$, of which the SM branch ratio is $2.19 \times 10^{-4}$. This is an important channel to further examine the Higgs couplings with second generation of fermions. The analysis is performed on 240GeV CEPC with expected 5ab-1 luminosity in 10 years, with GEANT4-based full simulation.
The significance can reach 7.1 standard deviations ($\sigma$) in the model-independent analysis which uses only the information of Z boson decay, while can be 8.2 and 2.1$\sigma$ in the exclusive $Z\to qq$ and $Z \to \nu\nu$ channels, respectively. Impact of the Magnetic Field Strength and Tracker size to these measurements are further investigated
