  We study the impact of decoherence on B meson systems with specific emphasis
on Bs. For consistency we also study the Bd mesons based on the most recent
data. We find that the Bd mesons are 34 sigma away from total decoherence,
while the Bs mesons are seen to be upto 31sigma away from total decoherence.
Thus, our results prove, with experimental verity, that neutral meson systems
are free from decoherence effects. Therefore, this provides a very useful
laboratory for testing the foundations of quantum mechanics.
