We apply Chiral Perturbation Theory at one loop to analyze the general formula for the pi+pi- atom lifetime derived recently in the framework of QCD. The corresponding analytic expression is investigated numerically, and compared with recent work in the literature.
@article{arxiv.hep-ph/9910438,
title = {Numerical analysis of the pi+pi- atom lifetime in ChPT},
author = {J. Gasser and V. E. Lyubovitskij and A. Rusetsky},
journal= {arXiv preprint arXiv:hep-ph/9910438},
year = {2015}
}