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Quantum-Mechanical Interference over Macroscopic Distances in the B0 B0 bar System

R. A. Bertlmann, W. Grimus

hep-pharXiv:hep-ph/9610301

Abstract

We argue that the B0 B0 bar state generated in the decay of Upsilon(4S) is well suited for performing tests of Einstein-Podolsky-Rosen correlations, i.e., quantum-mechanical interference effects over macroscopic distances. Using measurements of the ratio R = (#like-sign dilepton events)/(#opposite-sign dilepton events) and of the BH - BL mass difference we show that already presently existing data strongly favour the contribution of the interference term to R, as it is required by the rules of quantum mechanics.

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