We present branching fraction and CP asymmetry measurements as well as angular studies of B→ϕϕK decays using 464×106 BB̅ events collected by the BABAR experiment. The branching fractions are measured in the ϕϕ invariant mass range below the ηc resonance (mϕϕ<2.85  GeV). We find B(B+→ϕϕK+)=(5.6±0.5±0.3)×10-6 and B(B0→ϕϕK0)=(4.5±0.8±0.3)×10-6, where the first uncertainty is statistical and the second systematic. The measured direct CP asymmetries for the B± decays are ACP=-0.10±0.08±0.02 below the ηc threshold (mϕϕ<2.85  GeV) and ACP=0.09±0.10±0.02 in the ηc resonance region (mϕϕ in [2.94, 3.02] GeV). Angular distributions are consistent with JP=0- in the ηc resonance region and favor JP=0+ below the ηc resonance.

Measurements of branching fractions and CP asymmetries and studies of angular distributions for B→ϕϕK decays / J., L., V., P., E., P., V., T., J., G.T., E., G., M., M., D., M., A., P., M., P., G., E., B., S., L., S., D., B., L., K., Kolomensky, Y.u., G., L., H., K., T., S., D., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 84:(2011), pp. 012001-1-012001-13. [10.1103/PhysRevD.84.012001]

Measurements of branching fractions and CP asymmetries and studies of angular distributions for B→ϕϕK decays

LANCERI, LIVIO;VITALE, LORENZO;
2011-01-01

Abstract

We present branching fraction and CP asymmetry measurements as well as angular studies of B→ϕϕK decays using 464×106 BB̅ events collected by the BABAR experiment. The branching fractions are measured in the ϕϕ invariant mass range below the ηc resonance (mϕϕ<2.85  GeV). We find B(B+→ϕϕK+)=(5.6±0.5±0.3)×10-6 and B(B0→ϕϕK0)=(4.5±0.8±0.3)×10-6, where the first uncertainty is statistical and the second systematic. The measured direct CP asymmetries for the B± decays are ACP=-0.10±0.08±0.02 below the ηc threshold (mϕϕ<2.85  GeV) and ACP=0.09±0.10±0.02 in the ηc resonance region (mϕϕ in [2.94, 3.02] GeV). Angular distributions are consistent with JP=0- in the ηc resonance region and favor JP=0+ below the ηc resonance.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2567029
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