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http://hdl.handle.net/2445/131757
Title: | Measurements of branching fractions and CP asymmetries and studies of angular distributions for B→ϕϕK decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 5-Jul-2011 |
Publisher: | American Physical Society |
Abstract: | We present branching fraction and C P asymmetry measurements as well as angular studies of B → ϕ ϕ K decays using 464 × 10 6 B ¯¯¯ B events collected by the BABAR experiment. The branching fractions are measured in the ϕ ϕ invariant mass range below the η c resonance ( m ϕ ϕ < 2.85 GeV ). We find B ( B + → ϕ ϕ K + ) = ( 5.6 ± 0.5 ± 0.3 ) × 10 − 6 and B ( B 0 → ϕ ϕ K 0 ) = ( 4.5 ± 0.8 ± 0.3 ) × 10 − 6 , where the first uncertainty is statistical and the second systematic. The measured direct C P asymmetries for the B ± decays are A C P = − 0.10 ± 0.08 ± 0.02 below the η c threshold ( m ϕ ϕ < 2.85 GeV ) and A C P = 0.09 ± 0.10 ± 0.02 in the η c resonance region ( m ϕ ϕ in [2.94, 3.02] GeV). Angular distributions are consistent with J P = 0 − in the η c resonance region and favor J P = 0 + below the η c resonance. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.84.012001 |
It is part of: | Physical Review D, 2011, vol. 84, num. 1, p. 012001 |
URI: | http://hdl.handle.net/2445/131757 |
Related resource: | https://doi.org/10.1103/PhysRevD.84.012001 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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