Spontaneous breaking of CPT is possible in string theory. We show that it can arise at a level within reach of experiments at meson factories currently being built or designed. For φ, B, and τ-charm factories, we discuss the likely experimental string signatures and provide estimates of the bounds that might be attained in these machines.

• Received 17 May 1994

DOI:https://doi.org/10.1103/PhysRevD.51.3923