This web page summarizes the measurement of rare flavor-changing neutral current B meson decays with two muons in the final state, based based upon 924 pb^{&minus 1} of CDF II data. The results have been approved as of November 30, 2006.

We measure:

B(B⁺ &rarr &mu⁺&mu^&minusK⁺) = (0.60 ± 0.15 ± 0.04)×10^-6,
B(B⁰ &rarr &mu⁺&mu^&minusK*⁰) = (0.82 ± 0.31 ± 0.10)×10^-6, and
B(B_s &rarr &mu⁺&mu^&minus&phi)/ B(B_s &rarr J/ψ&phi) < 2.61(2.30)×10^-3 at 95(90)%CL.

• B→J/ψh yields with loose cuts: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Signal to background comparison of the lifetime significance: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Signal to background comparison of the pointing angle: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Signal to background comparison of the isolation variable: B⁺: eps gif B⁰: eps gif B_s: eps gif
• B→J/ψh yields with tight cuts: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Dependence of the selection efficiency on the dimuon invariant mass B⁺: eps gif B⁰: eps gif B_s: eps gif
• Data/MC comparison of the lifetime significance: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Data/MC comparison of the pointing angle: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Data/MC comparison of the &chi probability of the vertex fit: B⁺: eps gif B⁰: eps gif B_s: eps gif
• B&rarr&mu⁺&mu^&minush signals: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Raw dimuon invariant mass in B&rarr&mu⁺&mu^&minush signal winows: B⁺: eps gif B⁰: eps gif B_s: eps gif
• Comparison with previous measurements: B⁺: eps gif B⁰: eps gif