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Measurements of branching fractions and CP asymmetries and studies of angular distributions for B to phi phi K decays

Abstract : We present branching fraction and CP asymmetry measurements as well as angular studies of B to phi phi K decays using 464 x 10^6 BBbar events collected by the BaBar experiment. The branching fractions are measured in the phi phi invariant mass range below the eta_c resonance (m_phiphi <2.85 GeV). We find B(B+ to phi phi K+) = (5.6 +/- 0.5 +/- 0.3) x 10^-6 and B(B0 to phi phi K0) = (4.5 +/- 0.8 +/- 0.3) x 10^-6, where the first uncertaintiy is statistical and the second systematic. The measured direct CP asymmetries for the B+- decays are A_CP = -0.10 +/- 0.08 +/- 0.02 below the eta_c threshold and A_CP = 0.09 +/- 0.10 +?- 0.02 in the eta_c resonance region (m_phiphi in [2.94,3.02] GeV). Angular distributions are consistent with J^P = 0- in the eta_c resonance region and favor J^P = 0+ below the eta_c resonance.
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http://hal.in2p3.fr/in2p3-00597162
Contributor : Claudine Bombar <>
Submitted on : Tuesday, May 31, 2011 - 11:41:52 AM
Last modification on : Wednesday, September 16, 2020 - 4:26:29 PM

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J.P. Lees, V. Poireau, E. Prencipe, V. Tisserand, D. Bernard, et al.. Measurements of branching fractions and CP asymmetries and studies of angular distributions for B to phi phi K decays. Physical Review D, American Physical Society, 2011, 84, pp.012001. ⟨10.1103/PhysRevD.84.012001⟩. ⟨in2p3-00597162⟩

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