Dispersion Analysis of Possible Parity Nonconservation in Low-Energy Pion-Nucleon Scattering

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Abstract
An attempt is made to analyze the possible parity nonconservation in low-energy pion-nucleon scattering. The use of relativistic dispersion relations enables us to relate such effects to the possible parity nonconservation in strange-particle production from pion-nucleon collisions. We show that large violations of parity conservation in strange-particle production are indeed compatible with small effects in low-energy pion-nucleon scattering. It is suggested that our result might be useful in order to understand the very good evidence for parity conservation in nuclear physics.