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Title: Effective field theory approach to pionium
Author: Eiras, Dolors
Soto Riera, Joan
Keywords: Teoria de camps (Física)
Partícules (Física nuclear)
Interaccions electromagnètiques
Mesons (Física nuclear)
Field theory (Physics)
Particles (Nuclear physics)
Electroweak interactions
Issue Date: 2000
Publisher: The American Physical Society
Abstract: The various dynamical scales below the pion mass involved in $\pi^{+}$ $\pi^{-}$ atoms are sequentially integrated out using non-relativistic effective field theory techniques. This allows us to systematically organise the corrections to the energy levels and decay width. We present our results in terms of a single unknown constant which may be obtained by matching to the Chiral Lagrangian with electromagnetic interactions at two loops.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review D, 2000, vol. 61, núm. 11, p. 114027-1-114027-11
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ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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