Of potential interest:


Mesons violate Bell's inequality (Nov 6)
   The famous Bell's inequality of quantum mechanics has been tested in a
  high-energy particle physics experiment for the first time. The
  inequality was violated by three standard deviations in experiments with
  B mesons at the KEK laboratory in Japan - yet again confirming the
  predictions of quantum theory (arxiv.org/abs/quant-ph/0310192; J. Mod.
  Optics to be published). Previously most Bell's inequality experiments
  have been performed with photons or ions.

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