Numerical upper bounds on theCPnonconservation of neutral-heavy-meson systems in the standard six-quark model

Using recently obtained bounds on the mixing angles in the standard six-quark model and our own calculations of ImΓ₁₂ReΓ₁₂ as well as the standard expressions of ImM₁₂ReM₁₂ for the heavy-meson systems D⁰-D̄⁰, B⁰-B̄⁰, and Bₛ⁰-B̄ₛ⁰, we find upper limits of 4×{}10^-3, 5×{}10^-4, and 7×{}10^-4 for the magnitude of the phase-convention-independent quantity 2Reε(1+|ε|²) as a measure of the size of CP nonconservation in these respective systems. Although our numerical results depend crucially on the specific values for the mixing angles taken from the work of others, our method is of general application and can be used to set upper limits on 2Reε(1+|ε|²), whatever values these angles might take.