Electromagnetic corrections to gamma pi(+) -> pi(0) pi(+)
High Energy Physics - Phenomenology
2009-11-07 v2 High Energy Physics - Experiment
Abstract
The amplitude for the anomalous transitions gamma pi(+) -> pi(0) pi(+) is analyzed within Chiral Perturbation Theory including electromagnetic interactions. The presence of a t-channel one-photon exchange contribution induces sizeable e^2 corrections which enhance the cross-section in the threshold region and bring the theoretical prediction into agreement with available data. In the case of the crossed reaction gamma pi(0) -> pi(+) pi(-), the same contribution appears in the s-channel and its effects are small.
Cite
@article{arxiv.hep-ph/0107127,
title = {Electromagnetic corrections to gamma pi(+) -> pi(0) pi(+)},
author = {Ll. Ametller and M. Knecht and P. Talavera},
journal= {arXiv preprint arXiv:hep-ph/0107127},
year = {2009}
}
Comments
16 pages, 4 figures, fixed two typos, no changes