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We extract the G-parity-violating branching ratio Br(omega->pi^+ pi^-) fromthe effective rho-omega mixing matrix element Pi_{rho omega}(s), determinedfrom e^+e^- -> pi^+ pi^- data. The omega->pi^+ pi^- partial width can bedetermined either from the time-like pion form factor or through the constraintthat the mixed physical propagator D_{rho omega}^{mu nu}(s) possesses no poles.The two procedures are inequivalent in practice, and we show why the first ispreferred, to find finally Br(omega->pi^+ pi^-) = 1.9 +/- 0.3%.Comment: 12 pages (published version

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

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ExtractingB(ω→π+π−