Abstract
The problem whether the interpretation of strong interactions as high-energy effects of the universal Fermi interactions (UFI) is consistent with experimental evidence on parity conservation in low-energy nuclear physics is investigated. The parity-nonconserving part of the one-nucleon-off-shell $\ensuremath{\pi}\ensuremath{-}N$ vertex, which originates in the UFI (which we consider smeared out with a heavy vector boson of such a mass that they bind an extreme relativistic nucleon-antinucleon pair into a pion) of the nucleons, is evaluated using dispersion methods and is found to have a relative magnitude of order ${10}^{\ensuremath{-}5}$ when compared with the parity-conserving part. This yields a parity-nonconserving $\ensuremath{\pi}\ensuremath{-}N$ scattering amplitude of the same relative order of magnitude, a result which does not contradict the existing experimental data.
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