/ 99 06 52 0 v 3 2 9 M ar 2 00 1 Measuring the finite width and unitarity corrections to the φω mixing amplitude

Measuring the finite width and unitarity corrections to the φω mixing amplitude. Abstract It is shown that the phase of φω interference in the reaction e + e − → π + π − π 0 at energies close to the φ(1020) peak can be calculated in a way that is practically independent of the model of φω mixing. The magnitude of the presently measured interference phase, still of poor accuracy, is in agreement with the predictions based on extending the ω(782) resonance tail from the peak position to the φ mass upon assuming the ω → ρπ → 3π model. The calculated ω width at the φ mass is about 200 MeV.