The properties of the σ and κ resonances in a new unitarization approach
H. Q. Zheng, Z. Y. Zhou, G. Y. Qin, Z. G. Xiao
Abstract
A new unitarization approach is discussed and applied to study the elastic πK scattering process. The existence of the light κ resonance is firmly established if the scattering length in the I=1/2 channel does not deviate too much from its value obtained from chiral perturbation theory, and a precise determination to the mass and width of the κ resonance requires a precise determination of the scattering length parameter.
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