Abstract
The results of new measurements of J/ψ→n n and J/ψ→p p performed by the FENICE experiment are reported. The relative phase φ, between the strong and the electromagnetic decay amplitudes, is achieved from the branching ratios J/ψ→N N and from the nucleon form factors measurements near the J/ ψ. It turns out φ=89 o ±15 o , in agreement with other J/ ψ decay amplitudes.
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