Further comment on pion electroproduction and the axial form factor

Details Further comment on pion electroproduction and the axial form factor Further comment on pion electroproduction and the axial form factor

2001-01-08

arxiv.org/abs/hep-ph/0101062v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 pp, somewhat more detailed than the comment by P. Guichon, hep-ph/0012126

Scientific paper

We show that a recent claim (H.Haberzettl, Phys. Rev. Lett. 85 (2000) 3576)
that one cannot extract the nucleon weak axial form factor G_A (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 G_A (t), and they should certainly be pursued.

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