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The Pion-Nucleon coupling constant from np charge exchange scattering

Abstract : 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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http://hal.in2p3.fr/in2p3-00195859
Contributor : Dominique Girod <>
Submitted on : Tuesday, December 11, 2007 - 3:43:44 PM
Last modification on : Friday, April 10, 2020 - 5:23:05 PM

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B. Loiseau, T. E. O. Ericson, J. Rahm, J. Blomgren, N. Olsson. The Pion-Nucleon coupling constant from np charge exchange scattering. Seventh International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Jul 1997, Vancouver, Canada. pp.117. ⟨in2p3-00195859⟩

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