Measurement of the branching fractions of and in
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文摘
We study View the MathML source decays to final states involving the η with a 482 pb−1 data sample collected at View the MathML source with the BESIII detector at the BEPCII collider. We measure the branching fractions View the MathML source and View the MathML source where the first uncertainty is statistical and the second is systematic. In addition, we estimate an upper limit on the non-resonant branching ratio View the MathML source at the 90% confidence level. Our results are consistent with CLEO's recent measurements and help to resolve the disagreement between the theoretical prediction and CLEO's previous measurement of View the MathML source.

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