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- W2011036907 abstract "Abstract The analysis of Manley and collaborators [1] of the decay of the Roper into two pions requires the introduction of an effective scalar-isosclar ϵ or σ meson in order to describe the s-wave ππ interaction. Here we try to understand at a more fundamental level the origin of this effective channel. In our model the two pions are produced in single pion-baryon-baryon vertices and their re-scattering in the L=0, I=0 channel is explicitly evaluated. For that purpose we use unitarized chiral perturbation theory to obtain the Bethe-Salpeter amplitude for the two pion re-scattering in the appropriate channel. Our model produces invariant mass distributions in agreement with the ones obtained in Manley's approach." @default.
- W2011036907 created "2016-06-24" @default.
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- W2011036907 date "2003-06-01" @default.
- W2011036907 modified "2023-10-01" @default.
- W2011036907 title "Chiral approach to the two pion decay of the Roper" @default.
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- W2011036907 doi "https://doi.org/10.1016/s0375-9474(03)01126-6" @default.
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