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

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

1998-01-13

arxiv.org/abs/hep-ph/9801284v1

Phys.Rev.D57:5717-5722,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, RevTex

Scientific paper

10.1103/PhysRevD.57.5717

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.

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