Relativistic corrections to the Pionium Lifetime
High Energy Physics - Phenomenology
2009-10-31 v2
Abstract
Next to leading order contributions to the pionium lifetime are considered within non-relativistic effective field theory. A more precise determination of the coupling constants is then needed in order to be consistent with the relativistic pion-pion scattering amplitude which can be obtained from chiral perturbation theory. The relativistic correction is found to be 4.1% and corresponds simply to a more accurate value for the non-relativistic decay momentum.
Keywords
Cite
@article{arxiv.hep-ph/9905539,
title = {Relativistic corrections to the Pionium Lifetime},
author = {Xinwei Kong and Finn Ravndal},
journal= {arXiv preprint arXiv:hep-ph/9905539},
year = {2009}
}
Comments
5 pages, Latex. Includes corrections based on a more precise matching to the pion-pion scattering amplitude from chiral perturbation theory