Precision determination of the pi-N scattering lengths and the charged pi-NN coupling constant
Ericson, T. E. O. · Loiseau, B. · Thomas, A. W.
Original · EN
We critically evaluate the isovector GMO sumrule for the charged πN N coupling constant using recent precision data from π-p and π-d atoms and with careful attention to systematic errors. From the π-d scattering length we deduce the pion-proton scattering lengths 1/2(aπ₋ₚ+aπ₋ₙ)=(-20± 6(statistic) ± 10 (systematic)) · 10⁻⁴mπc⁻¹ and 1/2(aπ₋ₚ-aπ₋ₙ)=(903 ± 14)· 10⁻⁴mπc⁻¹. From this a direct evaluation gives g²c(GMO)/4π=14.20± 0.07(statistic)± 0.13(systematic) or f²c/4π= 0.0786± 0.0008.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.