arXiv subjects
Publications and source records attributed to Michael Milnik.
We present the CDF results using 1.0 fb^{-1} of data on the mixing frequency measurement in the B_s system and the lifetime measurements of several B hadrons. We obtain Δm_s=17.77 +- 0.1 +- 0.07 ps^{-1} and cτ(Λ_b)=473.8 +- 23.1 +- 3.5 μm. The later one is more than 3 sigma above the world average, but in reasonable agreement with HQE calculations.
We report on searches for B^0_s to μ^+ μ^-, B^0_d to μ^+ μ^- decays and b to s μ^+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(B^0_s to μ^+ μ^-) < 5.8 x 10^{-8} and B(B^0_d to μ^+ μ^-) < 1.8 x 10^{-8} at 95% confidence level. Using 924 pb^{-1} of data we measure the branching fractions B(B^+ to μ^+ μ^- K^+) = (0.60 \pm 0.15 \pm 0.04) x 10^{-6}, B(B^0_d to μ^+ μ^- K^{*0}) = (0.82 \pm 0.31 \pm 0.10) x 10^{-6} and the limit B(B^0_s to μ^+ μ^- phi)/B(B^0_s to J/ψϕ) < 2.61(2.30) x 10^{-3} at 95(90)% confidence level.