ON EXTRACTING THE RHO-OMEGA MIXING AMPLITUDE FROM THE PION FORM-FACTOR

In this paper we improve and extend a recent analysis which showed tha t the rho-omega mixing amplitude cannot be unambiguously extracted fro m the pion electromagnetic form-factor in a model independent way. In particular, we focus on the argument that the extraction is sensitive to the presence of any intrinsic omega(I) --> pi pi coupling. Our exte nded analysis confirms the original conclusion, with only minor, quant itative differences. The extracted mixing amplitude is shown to be sen sitive to both the intrinsic coupling omega(I) --> pi pi and to the va lue assumed for the mass of the rho(0)-meson.