2008

Quantum entanglement at the psi(3770) and Upsilon(4S)

Yabsley, B. D.

Understand

We review results which explicitly depend on the entanglement of neutral meson pairs produced at the psi(3770) and Upsilon(4S).

Time-dependent CP-violation analyses at the B-factories use the flavour-singlet final state at the Upsilon(4S), but by assuming its quantum-mechanical evolution; Belle on the other hand has tested the time-dependent flavour correlation of the B-mesons, comparing predictions of quantum mechanics, spontaneous disentanglement, and Pompili-Selleri models.
At the psi(3770), decay rates are modulated by various combinations of the charm mixing parameters: this has been exploited by CLEO-c to provide the first effective constraint on the strong-phase difference delta.
Finally, the goal of a "model-independent" phi_3/Dalitz analysis is now within reach, using D-mesons from the psi(3770) to constrain the D0 -> K_S pi+ pi- decay amplitude.

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