(Pi+Pi-) Atom in Chiral Perturbation Theory
arXiv:hep-ph/9805356 · doi:10.1103/PhysRevD.58.094024
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.
36 pages, LaTeX-file (revtex.sty)