%0 Journal Article
%A Oller, J. A.
%A Oset, E.
%A Peláez Sagredo, José Ramón
%T φ →π⁺π⁻ decay within a chiral unitary approach
%D 2000
%@ 1550-7998
%U https://hdl.handle.net/20.500.14352/59871
%X Starting from the chiral perturbation theory Lagrangian, but keeping different masses for the charged and neutral mesons (m_u ≠ m_d), and using a previously developed nonperturbative unitary scheme that generates the lightest meson-meson resonances, we construct KK̅→KK̅ and KK̅→π⁺π⁻ in the vector channel. This allows us to obtain the kaon-loop contribution to φ-ρ mixing and study the φ→π⁺π⁻  decay. The dominant contribution to this decay comes from the φ→ϒ→π⁺π⁻ process. However, there can be large interferences with the subdominant contributions coming from φ-ρ and φ-ω mixing, or of these two contributions among themselves. As a consequence, a reliable measurement of φ→π⁺π⁻  decay could be used to differentiate between some φ-ω mixing scenarios proposed in the literature.
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