(Pi+Pi-) Atom in Chiral Perturbation Theory

A. G. Rusetsky (JINR; Dubna; Dubna); E. Z. Lipartia (JINR; IHEP; M. A. Ivanov (JINR; Tbilisi State University); Tomsk State University); V. E. Lyubovitskij (JINR

arxiv: hep-ph/9805356 · v1 · submitted 1998-05-18 · ✦ hep-ph

(Pi+Pi-) Atom in Chiral Perturbation Theory

M. A. Ivanov (JINR , Dubna) , V. E. Lyubovitskij (JINR , Dubna , Tomsk State University) , E. Z. Lipartia (JINR , IHEP , Tbilisi State University)

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A. G. Rusetsky (JINR

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classification ✦ hep-ph

keywords atomchirallifetimeperturbationrelativistictheoryapproachbethe-salpeter

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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.

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(Pi+Pi-) Atom in Chiral Perturbation Theory

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