Abstract

We apply Chiral perturbation theory at one loop to analyze the general formula Ibr the pi(+) pi(-) atom lifetime derived recently in the framework of QCD [A. Gall ct al., Phys. Lett. B 462 (1999) 335]. The corresponding analytic expression is investigated numerically, and compared with recent work in the literature. (C) 1999 Elsevier Science B.V. All rights reserved.