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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>0</mml:mn></mml:mrow></mml:msub></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>χ</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>decays into<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi><mml:mi>η</mml:mi></mml:math>,<…
Using a sample of 3×106 ψ(2S) decays collected by the CLEO III and CLEO-c detector configurations, we present results of a study of χc0 and χc2 decays into ηη, ηη′, and η′η′ final states. We find B(χc0→ηη)=(0.31±0.05±0.04±0.02)%, B(χc0→ηη′)<0.05% at the 90% confidence level, and B(χc0→η′η′)=(0.17±0.04±0.02±0.01)%. We also present upper limits …