Systematic effects in the determination of the piNN Coupling from pbar p -> nbar n differential cross section

Abstract

We show that the $\pi NN$ coupling constant extracted model-independently from $\bar{p}p$ charge exchange is subject to a systematic correction, and, more importantly, that the strong absorption in the critical region prevents a determination of the coupling constant to high precision using this process. This attenuates the possible conflict with the value determined from the np charge exchange cross sections.

Comments: 14 pages, LaTeX, 4 encapsulated Postscript figures (uses epsf.tex), to be published in Phys. lett. B