Expected Measurements of the Higgs boson mass and ZH production cross sections at the Future e⁺e^- Circular Collider (FCC-ee)

At the Future e⁺e^- Circular Collider, data-taking is foreseen at various energy points.

We first study the precision that can be achieved on the Higgs boson mass and ZH cross-section in ZH events at √s = 240 GeV, using the recoil mass technique in the e⁺e^- and μ⁺μ^- final states. Additionally, a full simulation and a study on the variation of detector design for the Higgs boson mass measurement is presented.

We also investigate the precision that can be achieved at the ttbar production threshold (√s = 365 GeV). The Higgs boson mass and total ZH cross section measurements at √s = 365 GeV are studied, and the expected precisions for the measurements at the energy points of the ttbar production threshold are also presented.