Measurements of Branching Fractions and CP Asymmetries in Decays of a B Meson to Two Phi Mesons and a K Meson
- Author(s): Atmacan, Hulya
- Advisor(s): Long, Owen R
- et al.
We present measurements of the decays B+ to phi phi K+ and B0 to phi phi K0 using about 464 million BBbar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We report the branching fractions of the decays B+ to phi phi K+ and B0 to phi phi K0, and CP asymmetry in the charged B mode for phi phi invariant mass below 2.85 GeV/c2:
B(B0 to phi phi K0)=(4.5±0.8±0.3)×10-6,
B(B+ to phi phi K+)=(5.6±0.5±0.3)×10-6,
Ach(B+ to phi phi K+) = - 0.10 ± 0.08 ± 0.02.
Additionally, we measure the direct CP asymmetry in B+ to phi phi K+ for phi phi invariant mass within the eta_c resonance region ([2.94 - 3.02] GeV/c2):
Ach(B+ to phi phi K+) = - 0.09 ± 0.10 ± 0.02.
No direct CP asymmetry is observed both below the eta_c and within the eta_c resonance, as expected within the Standard Model.
In each case the uncertainties are statistical and systematic, respectively.