Title:
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Effective field theory approach to pionium
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Author:
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Eiras, Dolors; Soto Riera, Joan
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Other authors:
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Universitat de Barcelona |
Abstract:
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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. |
Subject(s):
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-Teoria de camps (Física) -Partícules (Física nuclear) -Interaccions electromagnètiques -Mesons (Física nuclear) -Field theory (Physics) -Particles (Nuclear physics) -Electroweak interactions -Mesons |
Rights:
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(c) The American Physical Society, 2000
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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