Further comment on pion electroproduction and the axial form factor
V. Bernard, N. Kaiser, Ulf-G. Meißner
Abstract
We show that a recent claim (H.Haberzettl, Phys. Rev. Lett. 85 (2000) 3576) that one cannot extract the nucleon weak axial form factor GA (t) from charged pion threshold electroproduction is incorrect. Thus previous calculations remain valid and threshold charged pion electroproduction experiments can indeed be used to determine GA (t), and they should certainly be pursued.
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