We reconstruct the rare decays B+ --> K+ mu+mu-, B0 ->
K*(892)0 mu+ mu-, and B_s0 --> phi(1020) mu+ mu- in a data sample
corresponding to 4.4 fb-1 collected in p anti-p collisions at s**(1/2)
ñ.96 TeV by the CDF II detector at the Fermilab Tevatron Collider.
Using 120 +/- 16 B+ --> K+ mu+ mu- and 101 +/- 12 b0 --> K*0 mu+
mu- decays we report the branching ratios. In addition, we report
the measurement of the differential branching ratio and the muon
forward-backward asymmetry in the B+ and B0 decay modes, and the
K*0 longitudinal polarization in the B0 decay mode with respect to
the squared dimuon mass. These are consistent with the theoretical
prediction from the standard model, and most recent determinations from
other experiments and of comparable accuracy. We also report the first
observation of the B_s0 --> phi mu+ mu- decay and measure its branching
ratio B(B_s0 --> phi mu+ mu-) ÿ1.44 +/- 0.33 +/- 0.46] x 10-65 using 27
+/- 6 signal events. This is currently the most rate B_s0 decay observed.
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Updated: Monday, 2011 April 18 16:29:34 CDT automatically from input from "Carol Picciolo"