χc0 and χc2 decays into ηη, ηη', and η'η' final states

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 χ_c0 and χ_c2 decays into ηη, ηη^', and η^'η^' final states. We find B(χ_c0→ηη)=(0.31±0.05±0.04±0.02)%, B(χ_c0→ηη^')<0.05% at the 90% confidence level, and B(χ_c0→η^'η^')=(0.17±0.04±0.02±0.01)%. We also present upper limits for the decays of χ_c2 into these final states. These results give information on the decay mechanism of χ_c states into pseudoscalars.