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

T. E. O. Ericson, B. Loiseau

hep-pharXiv:hep-ph/9612420

Abstract

We show that the πNN coupling constant extracted model-independently from pp 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.

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