Upper Limit Oncpviolation in Thebs0−b¯s0system

In a previous publication we noted that the time dependence of an incoherent ${B}^{0}\ensuremath{-}{\overline{B}}^{0}$ mixture undergoes a qualitative change when the magnitude of $CP$ violation $\ensuremath{\delta}$ 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 $\ensuremath{\delta}$. 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.