Long-distance final-state interactions and J/psi decay

Abstract

To understand the short-distance vs long-distance final-state interactions, we have performed a detailed amplitude analysis for the two-body decay, J/psi into vector and pseudoscalar mesons. The current data favor a large relative phase nearly 90 degrees between the three-gluon and one-photon decay amplitudes. The source of this phase is apparently in the long-distance final-state interaction. Nothing anomalous is found in the magnitudes of the three-gluon and one-photon amplitudes. We discuss implications of this large relative phase in the weak decay of heavy particles.

11 pages, RevTex

Cited by in corpus (11)

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• Open charm effects in the explanation of the long-standing "$\rho \pi$ puzzle"
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• Study of $C$ parity violating and strangeness changing $J/\psi$ $\to$ $PP$ weak decays