Perturbative framework for the pi(+)pi(-) atom

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

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Perturbative framework for the pi(+)pi(-) atom

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arxiv hep-ph/9801215 v2 submitted 1998-01-05 hep-ph

V. E. Lyubovitskij (JINR , Dubna , Tomsk University) , E. Z. Lipartia (JINR , Tbilisi University) , A. G. Rusetsky (JINR This is my paper · ORCID

classification hep-ph

keywords atomframeworkperturbativeapproachbasisbeenbethe-salpetercalculation

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The perturbative framework is developed for the calculation of the pi(+)pi(-) atom characteristics on the basis of the field-theoretical Bethe-Salpeter approach. A closed expression for the first-order correction to the pi(+)pi(-) atom lifetime has been obtained.

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