Electromagnetic effects in eta --> 3 pi
High Energy Physics - Phenomenology
2012-05-01 v1 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_d-m_u) 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.0910.0210,
title = {Electromagnetic effects in eta --> 3 pi},
author = {Christoph Ditsche and Bastian Kubis and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:0910.0210},
year = {2012}
}
Comments
9 pages, 5 figures, talk given at 6th International Workshop on Chiral Dynamics, Bern, Switzerland, July 6-10, 2009