We investigate cosmic baryon generation in the minimal low-energy supergravity model with the addition of dimension-four baryon-violating interactions. It is shown that gravitinos, if heavier than squarks, can give rise to a baryon asymmetry as they decay. Assuming that gravitinos are not diluted by inflation in the post-Planckian epoch, we find a realistic baryon-to-photon ratio for various ranges of gaugino and squark masses between 100 GeV and 10 TeV. We thus solve two problems simultaneously---the question of whence baryons originate and how to avoid washing out the baryon-photon ratio due to entropy production from decaying gravitinos.
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Cline et al. (1991) studied this question.
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