Threshold Neutral Pion Photoproduction on the Proton
High Energy Physics - Phenomenology
2016-06-22 v1
Abstract
The neutral pion photoproduction on the proton near threshold has a very small scattering cross section when compared to the charged channels, which in ChPT is explained by strong cancellations between the lowest order pieces. Therefore it is very sensitive to higher-order corrections of chiral perturbation theory. We perform a fully covariant calculation up to chiral order p^3 and we investigate the effect of the inclusion of the Delta(1232) resonance as an explicit degree of freedom. We show that the convergence improves, leading to a much better agreement with data at a wide range of energies.
Cite
@article{arxiv.1508.03486,
title = {Threshold Neutral Pion Photoproduction on the Proton},
author = {Astrid Hiller Blin and Manuel Vicente Vacas and Tim Ledwig},
journal= {arXiv preprint arXiv:1508.03486},
year = {2016}
}
Comments
Proceedings to the NSTAR2015 conference, which will be published in JPS conference proceedings