FCC-ee could measure B_s -> phi mu+ mu- branching ratio to 0.5% and time-dependent CP observables D_f, C_f, S_f to 0.1, 0.02, and 0.02, giving order-of-magnitude better Wilson coefficient constraints than pre-FCC projections.
Determining the Quark Mixing Matrix From CP-Violating Asymmetries
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If the Standard Model explanation of CP violation is correct, then measurements of CP-violating asymmetries in $B$ meson decays can in principle determine the entire quark mixing matrix.
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Time-Dependent Precision Measurement of $B_s^0\rightarrow \phi \mu^+\mu^-$ Decay at FCC-$ee$
FCC-ee could measure B_s -> phi mu+ mu- branching ratio to 0.5% and time-dependent CP observables D_f, C_f, S_f to 0.1, 0.02, and 0.02, giving order-of-magnitude better Wilson coefficient constraints than pre-FCC projections.