Abstract

su3⊗su3 chiral algebra and PCAC have been employed to derive pion and kaon scattering amplitudes on nuclei from sum rules of the Fubini-Furlan type. The nuclear states are described as finite systems in a simple, nonrelativistic impulse approximation. The effects of the break down of chiralSU3⊗SU3 symmetry are described in a (3, 3*)+(3*, 3) model. The πN sigma-term turns out to be about 46 MeV and we find good agreement between the model by Gell-Mann, Oakes and Renner and both pion and kaon-nucleus data.

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