Parapositronium Decay and Dispersion Relations
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
Positronium decay rates are computed at the one-loop level, using convolution-type factorized amplitudes. The dynamics of this factorization is probed with dispersion relations, showing that unallowed approximations are usually made, and some ordre alpha^2 corrections missed. Further, we discuss the relevance of the Schrodinger wavefunction as the basis for perturbative calculations. Finally, we apply our formalism to the parapositronium two-photon decay.
Cite
@article{arxiv.hep-ph/0006016,
title = {Parapositronium Decay and Dispersion Relations},
author = {G. Lopez Castro and J. Pestieau and C. Smith and S. Trine},
journal= {arXiv preprint arXiv:hep-ph/0006016},
year = {2007}
}
Comments
LaTeX, 13 pages, 1 eps figure