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Current algebra and kaon-nucleon scattering length sum rules

Research paper by W. W. Wada

Indexed on: 12 Apr '08Published on: 12 Apr '08Published in: Il Nuovo Cimento A (1971-1996)



Abstract

The method of Fubini and Furlan has been used to obtain hard-kaon corrections to the current algebra values for the kaon-nucleon scattering amplitudes at physical threshold. Using the experimental values for the scattering lengths, we have made several predictions on the low-energy kaon-nucleon interactions in the resonance approximation. It is shown that the unsubtracted dispersion relations and superconvergence relations which form the basis of the method are sufficient conditions for yet another derivation of the Adler-Weisberger low-energy theorem.