Quantum-Mechanical Interference over Macroscopic Distances in the B0 B0 bar System
R. A. Bertlmann, W. Grimus
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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