Electromagnetic corrections in eta --> 3 pi decays
High Energy Physics - Phenomenology
2010-04-30 v2 High Energy Physics - Experiment
Nuclear Experiment
Abstract
We re-evaluate the electromagnetic corrections to eta --> 3 pi decays at next-to-leading order in the chiral expansion, arguing that effects of order e^2(m_u-m_d) disregarded so far are not negligible compared to other contributions of order e^2 times a light quark mass. Despite the appearance of the Coulomb pole in eta --> pi+ pi- pi0 and cusps in eta --> 3 pi0, the overall corrections remain small.
Keywords
Cite
@article{arxiv.0812.0344,
title = {Electromagnetic corrections in eta --> 3 pi decays},
author = {Christoph Ditsche and Bastian Kubis and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:0812.0344},
year = {2010}
}
Comments
21 pages, 11 figures; references updated, version published in EPJC