  We analyze the prospects for observing CPT violation using neutral-meson
P0-P0bar systems. Before one can claim a measurement of CPT violation, one must
be able to rule out the possibility that its result is due to simpler
new-physics effects. In particular, one must be able to separate the
CPT-violating quantities from parameters violating the Delta P = \Delta Q rule
of semileptonic decays, and from new-physics contributions to the production
mechanism of the neutral mesons. One can isolate CPT violation using the
semileptonic decays of single, tagged neutral mesons; unfortunately, this
situation cannot be implemented at the Upsilon(4S). For P0-P0bar pairs produced
in a correlated parity-odd state we show that, by combining the di-lepton with
the single-lepton decays, it is in principle possible to extract unambiguously
one CPT-violating parameter. Finally, we develop the formalism necessary for
describing new-physics effects in the production mechanism; this includes both
cascade decays and violations of the rule of associated production.

High Energy Physics - Phenomenology