Branching Fractions in B -> phi h and Search for Direct CP Violation in B+- -> phi K+-
The BABAR Collaboration, B. Aubert
Abstract
We present preliminary measurements of branching fractions of the b -> sss penguin-dominated decays B+ -> phi K+ and B0 -> phi K0 in a sample of approximately 89 million BBbar pairs collected by the BaBar detector at the PEP-II asymmetric-energy B-meson Factory at SLAC. We determine BF(B+ -> phi K+) = (10.0+0.9-0.8 (stat.) 0.5 (syst.)) * 10-6 and BF(B0 -> phi K0) = (7.6+1.3-1.2 (stat.) 0.5 (syst.)) * 10-6. Additionally, we measure the charge asymmetry ACP(B+ -> phi K+) = 0.039 0.086 (stat.) 0.011 (syst.) and set an upper limit on the CKM- and color-suppressed decay B+ -> phi pi+, BF(B+ -> phi pi+) < 0.41 * 10-6 (90% CL).
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