We present the first evidence for the decay B0(s) --> phi phi and
a measurement of the Branching Ratio BR(B0(s) --> phi phi) using 180 pb-1 of
data collected by the CDF II experiment at the Fermilab Tevatron collider.
In addition, the BR and direct CP asymmetry for the B+ --> phi K+ decay are
measured. We obtain: BR(B0(s) --> phi phi) = (14+6_5(stat.) +/- 6(syst.)) x
10-6, BR(B+ --> phi K+) = (7.6 +/- 1.3(stat.) +/- 0.6(syst.)) x 10-6, and
A_CP(B+ --> phi K+) = -0.07 +/- 0.17(stat.) +0.03_-0.02(syst.). Both
decays are governed in the Standard Model by second order (penguin) b -->
ss-bar s amplitudes.
Return to top of page.
Go to Physics Results
Updated: Friday, 2005 August 26 10:18:05 CDT automatically from input from Carol Picciolo