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The Status of the Pion-Nucleon Coupling Constant

J. J. de Swart·M. C. M. Rentmeester·R. G. E. Timmermans
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Abstract

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 f^2 = 0.075 . A recent determination of f^2 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 f^2 using pp forward dispersion relations is not a realistic option.

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J. J. de Swart, M. C. M. Rentmeester, R. G. E. Timmermans. 1998-02-27. The Status of the Pion-Nucleon Coupling Constant. https://arxiv.org/abs/nucl-th/9802084

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