Search for rare b-hadron decays at CDF

We report on searches for Bs0 → μ+μ-, Bd0 → μ+μ- decays and b → sμ+μ-transitions in exclusive decays of B mesons. Using 2 fb-1 of data collected by the CDF II detector we find upper limits on the branching fractions B(Bd0 μ+μ-) < 5.8 → 10-8 and B(Bd0 → μ+μ-) < 1.8 → 10-8 at 95% confidence level. Using 924 pb-1 of data we measure the branching fractions B(B+ → μ+μ-K+) = (0.60 ± 0.15 ± 0.04) x 10-6, B(Bd0 → μ+μ-K*0) = (0.82 ±0.31 ±0.10) x 10-6 and the limit B(Bs0 → μ+μ-φ)/B(Bs0 → J/ψφ) < 2.61(2.30) x 10-3 at 95(90)% confidence level