On the pion electroproduction amplitude
Nuclear Theory
2009-11-07 v2 High Energy Physics - Phenomenology
Abstract
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.
Keywords
Cite
@article{arxiv.nucl-th/0105038,
title = {On the pion electroproduction amplitude},
author = {E. Truhlik},
journal= {arXiv preprint arXiv:nucl-th/0105038},
year = {2009}
}
Comments
14 pages, 6 figures, revised version, accepted for publication in Phys. Rev. C