Invariant Amplitudes for Pion Electroproduction
High Energy Physics - Phenomenology
2008-11-26 v1 Nuclear Theory
Abstract
The invariant amplitudes for pion electroproduction on the nucleon are evaluated by dispersion relations at constant t with MAID as input for the imaginary parts of these amplitudes. In the threshold region these amplitudes are confronted with the predictions of several low-energy theorems derived in the soft-pion limit. In general agreement with Chiral Perturbation Theory, the dispersive approach yields large corrections to these theorems because of the finite pion mass.
Cite
@article{arxiv.0712.2327,
title = {Invariant Amplitudes for Pion Electroproduction},
author = {B. Pasquini and D. Drechsel and L. Tiator},
journal= {arXiv preprint arXiv:0712.2327},
year = {2008}
}
Comments
18 pages, 8 figures