Perturbative framework for the pi(+)pi(-) atom
arXiv:hep-ph/9801215 · doi:10.1134/1.567598
Abstract
The perturbative framework is developed for the calculation of the pi(+)pi(-) atom characteristics on the basis of the field-theoretical Bethe-Salpeter approach. A closed expression for the first-order correction to the pi(+)pi(-) atom lifetime has been obtained.
8 pages, LaTeX-file