Abstract
We have measured the inclusive cross section for eta production in e/sup +/e/sup -/ interactions near charm threshold using the Crystal Ball detector. No pronounced structure in the energy dependence is observed. By comparing cross sections above and below charm threshold we obtain the limits (90% confidence limit): R(e/sup +/e/sup -/..-->..FF-barX)Br(F..-->..etax) ..etax)<0.13 (averaged over charged and neutral D components of the psi''(3770) decays). Our results are inconsistent with a previous report of a large energy dependence of the eta cross section ascribed to the crossing the FF* and F*F* production thresholds.
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