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- W2074236557 startingPage "3144" @default.
- W2074236557 abstract "With the purpose of taking scalar-meson mixing into account in the framework of the SU(3) ifmmodetimeselsetexttimesfi{} SU(3) $ensuremath{sigma}$ model of L'evy, we compute the ratio between the axial-vector form factor ${F}_{A}$ and the vector form factor ${F}_{V}$ for the $ensuremath{pi}ensuremath{rightarrow}eensuremath{nu}ensuremath{gamma}$ decay. Our results do not agree with previous calculations in this model even in the limit of no scalar-meson mixing. However, we find agreement with the experimental values of $frac{{F}_{A}}{{F}_{V}}$ for uncolored integrally charged quarks, and disagreement with colored fractionally charged quarks. This in turn implies that one must discard the SU(3) ifmmodetimeselsetexttimesfi{} SU(3) $ensuremath{sigma}$ model or the quark-loop-dominance framework because this fits the meson radiative decays only for colored fractionally charged quarks." @default.
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- W2074236557 date "1980-06-01" @default.
- W2074236557 modified "2023-10-03" @default.
- W2074236557 title "π→eνγdecay and the SU(3) × SU(3)σmodel" @default.
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- W2074236557 doi "https://doi.org/10.1103/physrevd.21.3144" @default.
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