LO ChPT calculation shows O(M_N)-enhanced Nπ contamination in axial 3-pt functions with linear time dependence and momentum-dependent distortions in pseudoscalar form factors that violate the generalized Goldberger-Treiman relation.
Parisi, Phys
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$N\pi$-excited state contamination in nucleon 3-point functions using ChPT
LO ChPT calculation shows O(M_N)-enhanced Nπ contamination in axial 3-pt functions with linear time dependence and momentum-dependent distortions in pseudoscalar form factors that violate the generalized Goldberger-Treiman relation.