Extractions of Resonance Parameters with Speed-Plot and Time-Delayed methods
ORAL
Abstract
Within several exactly soluable multi-channel multi-resonance models, the conditions under which the Speed-Plot and Time-Delayed Methods are valid in extracting resonances from the scattering amplitudes are studied. We then apply the methods to extract the nucleon resonances from the $\pi N$ amplitudes generated from a recently constructed dynamical coupled-channel model of $\pi N$ scattering up to $W=2$ GeV. The results comparing our findings and the values of Particle Data Group will be presented and discussed.
*This work is supported by a Grant-in-Aid for Scientific Research on Priority Areas(MEXT), Japan with No. 18042003, the US Department of Energy, Office of Nuclear Physics Division No.DE-AC02-06CH11357 and No. DE-AC06-06R23177.
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