On the pion electroproduction amplitude

Details On the pion electroproduction amplitude On the pion electroproduction amplitude

2001-05-16

arxiv.org/abs/nucl-th/0105038v2

Phys.Rev. C64 (2001) 055501

Physics

Nuclear Physics

Nuclear Theory

14 pages, 6 figures, revised version, accepted for publication in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.64.055501

We analyze amplitudes for the pion electroproduction on proton derived from Lagrangians based on the local chiral SU(2) x SU(2) symmetries. We show that such amplitudes do contain information on the nucleon axial form factor F_A in both soft and hard pion regimes. This result invalidates recent Haberzettl's claim that the pion electroproduction at threshold cannot be used to extract any information regarding F_A.

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