DYNAMICAL BREAKING OF CPT SYMMETRY IN DEFECT NETWORKS AND BARYOGENESIS

Based on a study of charge (C), parity (P) and time reversal (T) symme tries we show how a CP violating network of defects in the early Unive rse may bias baryon number production. A static network, even though i t violates CP, respects CPT and hence does not bias baryon number prod uction. On the other hand, the ordering dynamics of defects in a netwo rk, governed by the interplay of string tension, friction, inertia and the expansion of the Universe, results in the dynamical breakdown of CPT symmetry and may lead to a net baryon number production.