arXiv:hep-ph/9706244·v1·High Energy Physics — Phenomenology
Perturbative framework for the study of the properties of the pi(+)pi(-) atom
V. E. Lyubovitskij (JINR, Dubna and Tomsk University) · E. Z. Lipartia (JINR, Dubna and Tbilisi University) · A. G. Rusetsky (JINR, Dubna and Tbilisi University)
Abstract
The perturbative framework is developed for the calculation of the pi(+)pi(-) atom characteristics (energy level shift and lifetime) 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.
Comments: 11 pages, LaTeX-file (elsart.sty)