Numerical analysis of the #pi#~+#pi#~- atom lifetime in ChPT

摘要

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 A. Gall et al., Phys. Lett. B 462 (1999) 335. The corresponding analytic expression is investigated numerically, and compared with recent work in the literature.