Entropy production by dilaton decay is studied in the model where the dilaton acquires a potential via gaugino condensation in the hidden gauge group. Its effect on Affleck-Dine baryogenesis is investigated with and without nonrenormalizable terms in the potential. It is shown that the baryon asymmetry produced by this mechanism with higher-dimensional terms is diluted by the dilaton decay and can be regulated to the observed value.

• Received 16 October 2002

DOI:https://doi.org/10.1103/PhysRevD.67.103515