alpha^2 corrections to parapositronium decay
High Energy Physics - Phenomenology
2009-10-31 v2 Atomic Physics
Abstract
Two-loop QED corrections to the decay rate of parapositronium (p-Ps) into two photons are presented. We find Gamma(p-Ps --> 2 photons) = 7989.64(2)/microsec. The non-logarithmic O(alpha^2) corrections turn out to be small, contrary to some earlier estimates. We speculate that the so-called ``orthopositronium lifetime puzzle'' will not likely be solved by large QED corrections.
Cite
@article{arxiv.hep-ph/9904478,
title = {alpha^2 corrections to parapositronium decay},
author = {Andrzej Czarnecki and Kirill Melnikov and Alexander Yelkhovsky},
journal= {arXiv preprint arXiv:hep-ph/9904478},
year = {2009}
}
Comments
4 pages, revtex