An effective-Lagrangian calculation of φ→π⁺π⁻π⁰ that separates resonant and direct amplitudes and applies a constant Omnès factor for ππ rescattering produces Γ_th = 0.695 MeV and C_Ω = 4.794.
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Three-body decay $\phi\to\pi^+\pi^-\pi^0$ with Omn\`es-type final-state interactions
An effective-Lagrangian calculation of φ→π⁺π⁻π⁰ that separates resonant and direct amplitudes and applies a constant Omnès factor for ππ rescattering produces Γ_th = 0.695 MeV and C_Ω = 4.794.