Compton scattering from the proton at NLO in the chiral expansion
Abstract
We present calculations of differential cross sections for Compton scattering from the proton, using amplitudes calculated to fourth order in heavy baryon chiral perturbation theory. We compare with available data up to 200 MeV. We find that the agreement for angles below 90 degree is acceptable over the whole energy range, but that at more backward angles the agreement decreases above about 100 MeV, and fails completely above the photoproduction threshold.
Keywords
Cite
@article{arxiv.nucl-th/0101057,
title = {Compton scattering from the proton at NLO in the chiral expansion},
author = {Judith A. McGovern},
journal= {arXiv preprint arXiv:nucl-th/0101057},
year = {2014}
}
Comments
13 pages RevTeX, 7 eps figures. Revised version correcting some errors, principally in the coding of 3rd order contributions; figures changed slightly and contribution from diagram 1h revised. Conclusions are largely unchanged, but the failure of the chiral expansion is visible at rather lower angles than appeared previously to be the case