pi-NN Coupling Constants from NN Elastic Data between 210 and 800 Mev

Abstract

High partial waves for $pp$ and $np$ elastic scattering are examined critically from 210 to 800 MeV. Non-OPE contributions are compared with predictions from theory. There are some discrepancies, but sufficient agreement that values of the $πNN$ coupling constants $g_0^2$ for $π^0$ exchange and $g^2_{c}$ for charged $π$ exchange can be derived. Results are $g^2_0 = 13.91 \pm 0.13 \pm 0.07$ and $g^2_c = 13.69 \pm 0.15 \pm 0.24$, where the first error is statistical and the second is an estimate of the likely systematic error, arising mostly from uncertainties in the normalisation of total cross sections and $dσ/dΩ$.