Extracting the rho-omega mixing amplitude from the pion form-factor
H. B. O'Connell, A. W. Thomas, A. G. Williams
Abstract
We re-examine and extend a recent analysis which showed that the rho-omega mixing amplitude cannot be unambiguously extracted from 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 omegaI -> 2pi coupling. Our extended analysis confirms the original conclusion, with only minor, quantitative differences. The extracted mixing amplitude is shown to be sensitive to both the intrinsic coupling omegaI -> 2pi and to the value assumed for the mass of the neutral rho meson.
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