Measurements of $ψ(2S)$ decays into $φπ^0$, $φη$, $φ η^{'}$, $ωη$, and $ωη^{'}$

Details Measurements of $ψ(2S)$ decays into $φπ^0$, $φη$, $φ η^{'}$, $ωη$, and $ωη^{'}$ Measurements of $ψ(2S)$ decays into $φπ^0$, $φη$, $φ η^{'}$, $ωη$, and $ωη^{'}$

2004-08-24

arxiv.org/abs/hep-ex/0408118v2

Phys.Rev.D70:112003,2004

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 7 figures, 2 tables

Scientific paper

10.1103/PhysRevD.70.112003

Decays of the $\psi(2S)$ into Vector plus Pseudoscalar meson final states have been studied with 14 million $\psi(2S)$ events collected with the BESII detector. Branching fractions of $\psi(2S) \rar\phi\eta$, $\phi\etap$, and $\omega\etap$, and upper limits of $\psi(2S) \rar \phi\piz$ and $\omega\eta$ are obtained: $B(\psi(2S) \rar\phi\eta) = (3.3\pm 1.1 \pm 0.5) \times 10^{-5}$, $B(\psi(2S) \rar\phi\etap) = (3.1\pm 1.4 \pm 0.7)\times 10^{-5}$, and $B(\psi(2S) \rar\omega\etap) = (3.2^{+2.4}_{-2.0} \pm 0.7) \times 10^{-5}$; and $B(\psi(2S) \rar\phi\piz) < 0.40 \times 10^{-5}$, and $B(\psi(2S) \rar\omega\eta) < 3.1 \times 10^{-5}$ at the 90 % C.L.. These results are used to test the pQCD ``12% rule''.

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