Numerical analysis of the pi+pi- atom lifetime in ChPT
J. Gasser (Bern University), V. E. Lyubovitskij (Bern University,, JINR, Dubna, Tomsk University), A. Rusetsky (Bern University, JINR, Dubna, and HEPI, Tbilisi University)
TL;DR
This paper uses one-loop Chiral Perturbation Theory to analyze the lifetime of the pi+pi- atom, providing a detailed numerical investigation and comparison with existing literature.
Contribution
It offers a new analytic expression for the pi+pi- atom lifetime within ChPT and compares it with recent theoretical results.
Findings
Analytic formula for pi+pi- atom lifetime derived in ChPT
Numerical analysis of the lifetime expression conducted
Comparison with recent literature shows consistency or differences
Abstract
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.
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