The cusp effect in eta' --> eta pi pi decays
High Energy Physics - Phenomenology
2009-08-05 v2 High Energy Physics - Experiment
Nuclear Experiment
Abstract
Strong final-state interactions create a pronounced cusp in eta' --> eta pi0 pi0 decays. We adapt and generalize the non-relativistic effective field theory framework developed for the extraction of pi pi scattering lengths from K --> 3 pi decays to this case. The cusp effect is predicted to have an effect of more than 8% on the decay spectrum below the pi+ pi- threshold.
Keywords
Cite
@article{arxiv.0904.1320,
title = {The cusp effect in eta' --> eta pi pi decays},
author = {Bastian Kubis and Sebastian P. Schneider},
journal= {arXiv preprint arXiv:0904.1320},
year = {2009}
}
Comments
11 pages, 8 figures; comment added, typos corrected, version published in Eur. Phys. J. C