Quantum mechanical interference over macroscopic distances in the B0 anti-B0 system

We argue that the B~0 B~0 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 B_H - B_L 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.

13.25.Hw
14.40.Nd
03.65.Bz
B 0 B 0 system
Dilepton events
Entangled state EPR-correlations
Decoherence parameter
[formula omitted] system
Upsilon(10570): hadronic decay
B0: pair production

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