The off-Shell Electromagnetic Vertex of the Nucleon in Chiral Perturbation Theory

Details The off-Shell Electromagnetic Vertex of the Nucleon in Chiral Perturbation Theory The off-Shell Electromagnetic Vertex of the Nucleon in Chiral Perturbation Theory

1993-05-10

arxiv.org/abs/hep-ph/9305233v1

Nucl.Phys. A563 (1993) 539-548

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages (LaTeX), 1 figure (available upon request), NIKHEF 93-P1

Scientific paper

10.1016/0375-9474(93)90054-2

We study the electromagnetic vertex of a nucleon in next-to-leading order chiral perturbation theory (CPT). We consider the case where one of the nucleons at the $\gamma$NN vertex is off its mass shell. We define relevant measures for the off-shell dependence in the limited kinematical range allowed, and analyze their expansion in the pion mass. The leading nonanalytic contributions are calculated to estimate their size.

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