AGGREGATION WITH MULTIPLE CONSERVATION-LAWS

Aggregation processes with an arbitrary number of conserved quantities are investigated. On the mean-field level, an exact solution for the size distribution is obtained. The asymptotic form of this solution ex hibits nontrivial ''double'' scaling. While processes with one conserv ed quantity are governed by a single scale, processes with multiple co nservation laws exhibit an additional diffusionlike scale. The theory is applied to ballistic aggregation with mass and momentum conserving collisions and to diffusive aggregation with multiple species.