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- W2808990803 startingPage "1795" @default.
- W2808990803 abstract "Starting with partial-wave amplitudes for $ensuremath{pi}Nensuremath{rightarrow}Nensuremath{pi}$ and $ensuremath{pi}Nensuremath{rightarrow}mathrm{several}$ isobar-model states of $Nensuremath{pi}ensuremath{pi}$, we are able to apply the constraint of unitarity (using the $K$ matrix). This permits the removal of the overall phase ambiguity of the isobar amplitudes at each energy. The $K$-matrix fits generate a smooth prescription for the $T$-matrix amplitudes, enabling us to search the complex energy plane for poles. The uniqueness of these poles is demonstrated by doing Breit-Wigner refits to the fitted $T$-matrix amplitudes. The success of the refits and the obvious interpretation justifies a simple determination of coupling signs for which there can be checks with theory." @default.
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- W2808990803 date "1978-04-01" @default.
- W2808990803 modified "2023-09-26" @default.
- W2808990803 title "K-matrix fits toπN→NπandπN→Nππin the resonance regions=1.3 to 2.0GeV" @default.
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- W2808990803 doi "https://doi.org/10.1103/physrevd.17.1795" @default.
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