The Pion-Nucleon coupling constant from np charge exchange scattering

Details The Pion-Nucleon coupling constant from np charge exchange scattering The Pion-Nucleon coupling constant from np charge exchange scattering

1998-04-09

arxiv.org/abs/nucl-th/9804019v1

Invited Talk at The Seventh International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Vancouver, Brit

Physics

Nuclear Physics

Nuclear Theory

6 pages, 3 encapsulated figures, epsfig, menu97.cls (included)

Scientific paper

A novel extrapolation method has been used to deduce the charged Pion-Nucleon coupling constant from backward $np$ differential scattering cross sections. We applied it to new measurements performed at 162 MeV at the The Svedberg Laboratory in Uppsala. In the angular range $150^\circ-180^\circ$, the carefully normalized data are steeper than those of most previous measurements. The extracted value, $g^2_{\pi^\pm} = 14.52 \pm 0.26$, in good agreement with the classical value, is higher than those determined in recent nucleon-nucleon partial-wave analyses.

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