Cusps in K_L --> 3 pi decays
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
The pion mass difference generates a pronounced cusp in K --> 3 pi decays, the strength of which is related to the pi pi S-wave scattering lengths. We apply an effective field theory framework developed earlier to evaluate the amplitudes for K_L --> 3 pi decays in a systematic manner, where the strictures imposed by analyticity and unitarity are respected automatically. The amplitudes for the decay eta --> 3 pi are also given.
Cite
@article{arxiv.0710.4456,
title = {Cusps in K_L --> 3 pi decays},
author = {M. Bissegger and A. Fuhrer and J. Gasser and B. Kubis and A. Rusetsky},
journal= {arXiv preprint arXiv:0710.4456},
year = {2008}
}
Comments
15 pages, 3 figures, uses Elsevier style