arXiv:hep-ph/9805356·v1·High Energy Physics — Phenomenology
(Pi+Pi-) Atom in Chiral Perturbation Theory
M. A. Ivanov (JINR, Dubna) · V. E. Lyubovitskij (JINR, Dubna and Tomsk State University) · E. Z. Lipartia (JINR, Dubna and IHEP, Tbilisi State University) · A. G. Rusetsky (JINR, Dubna and IHEP, Tbilisi State University)
Abstract
Hadronic (Pi+Pi-) atom is studied in the relativistic perturbative approach based on the Bethe-Salpeter equation. The general expression for the atom lifetime is derived. Lowest-order corrections to the relativistic Deser-type formula for the atom lifetime are evaluated within the Chiral Perturbation Theory.
Comments: 36 pages, LaTeX-file (revtex.sty)