Study of psi(2S) decays to X J/psi

Details Study of psi(2S) decays to X J/psi Study of psi(2S) decays to X J/psi

2004-04-14

arxiv.org/abs/hep-ex/0404020v1

Phys.Rev.D70:012003,2004

Physics

High Energy Physics

High Energy Physics - Experiment

13 pages, 8 figures

Scientific paper

10.1103/PhysRevD.70.012003

Using J/psi -> mu^+ mu^- decays from a sample of approximately 4 million psi(2S) events collected with the BESI detector, the branching fractions of psi(2S) -> eta J/psi, pi^0 pi^0 J/psi, and anything J/psi normalized to that of psi(2S) -> pi^+ pi^- J/psi are measured. The results are B(psi(2S) -> eta J/psi)/B(psi(2S) -> pi^+ pi^- J/psi) = 0.098 \pm 0.005 \pm 0.010, B(psi(2S) -> pi^0 pi^0 J/psi)/B(psi(2S) -> pi^+ pi^- J/psi) = 0.570 \pm 0.009 \pm 0.026, and B(psi(2S) -> anything J/psi)/B(psi(2S) -> pi^+ pi^- J/psi) = 1.867 \pm 0.026 \pm 0.055.

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