An upper limit on CP violation in the $B^0_s-\bar{B}^0_s$ system

In a previous publication we noted that the time dependence of an incoherent B-0 - (B) over bar (0) mixture undergoes a qualitative change when the magnitude of CP violation delta exceeds a critical value. Requiring, on physical grounds, that the system evolve from an initial incoherent state to a final pure state in a monotonic way yields a new upper limit for delta. The recent measurement of the wrong charge semileptonic asymmetry of B-s(0) mesons presented by the D0 collaboration is outside this bound by 1 standard deviation. If this result is confirmed it implies the existence of a new quantum mechanical oscillation phenomenon.