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arXiv · 0902.3501

Measurement of the Branching Fraction for J/\psi -> p \bar{p}\eta and p \bar{p} \eta^{'}

BES collaboration
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Abstract

Using 58$\times 10^{6}$ $\jpsi$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC), the branching fractions of $\jpsi$ to $p\bar{p}\eta$ and $p\bar{p}\etap$ are determined. The ratio $\frac{\Gamma(\jpsi\rar\ppb\eta)}{\Gamma(\jpsi\rar\ppb)}$ obtained by this analysis agrees with expectations based on soft-pion theorem calculations.

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BES collaboration. 2009-02-20. Measurement of the Branching Fraction for J/\psi -> p \bar{p}\eta and p \bar{p} \eta^{'}. https://doi.org/10.1016/j.physletb.2009.04.066

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