Photoproduction of neutral-kaon pairs is studied from the perspective of CP
and CPT studies. Interference of the P- and S-waves, with the former due t
o diffractive phi production and the latter to f(0)/a(0) production, is sho
wn to enhance the CPT reach. Results are presented of Monte Carlo studies b
ased on rates expected in future experiments. (C) 2001 Published by Elsevie
r Science B.V.