Abstract
We report final results on prompt electron production in hadronic events from e/sup +/e/sup -/ annihilations at ..sqrt..s = 29 GeV, obtained with the DELCO detector at the SLAC storage ring PEP. We find the semielectronic branching ratios of charm and bottom quarks to be B(c..-->..se/sup +/..nu../sub e/) = (11.6/sub -0.9/ /sup +1.1/)% and B(b..-->..ce/sup -/nu-bar/sub e/) = (14.9/sub -1.9/ /sup +2.2/)% respectively. These results, from the complete data set, are consistent with an earlier analysis of partial data and indicate hard fragmentation functions for both c and b quarks, with mean values = 0.59 +- 0.04 and = 0.72 +- 0.05. The errors indicated here are a combination of statistical and systematic uncertainties.
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