The Status of the Pion-Nucleon Coupling Constant
de Swart, J. J. · Rentmeester, M. C. M. · Timmermans, R. G. E.
Original · EN
A review is given of the various determinations of the different piNN coupling constants in analyses of the low-energy pp, np, pbarp, and pi-p scattering data. The most accurate determinations are in the energy-dependent partial-wave analyses of the NN data. The recommended value is f² = 0.075. A recent determination of f² by the Uppsala group from backward np cross sections is shown to be model dependent and inaccurate, and therefore completely uninteresting. We also argue that an accurate determination of f² using pp forward dispersion relations is not a realistic option.
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