CPT, Strings, and Neutral Mesons

A sketch of our results on CPT and strings is given. A mechanism for spontaneous CPT violation in string theory is briefly reviewed, and recent theoretical progress is summarized. Possible CPT-violating contributions to a four-dimensional low-energy effective theory could produce effects at levels testable in neutral-meson systems. Likely experimental signatures and attainable bounds are outlined in candidate experiments with correlated and uncorrelated neutral mesons.