Isospin breaking in low-energy charged pion–kaon elastic scattering

We use chiral perturbation theory to evaluate the scattering amplitude for the process \(\pi^+K^-\rightarrow\pi^+K^-\) at leading and next-to-leading orders in the chiral counting and in the presence of isospin breaking effects. We also discuss the influence of the latter on the combination of the \...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2002-04, Vol.23 (4), p.707-718
Main Author: Nehme, A.
Format: Article
Language:English
Subjects:
Breaking
Chiral dynamics
Elastic scattering
Energy levels
Kaons
Perturbation theory
Pions
Scattering amplitude
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Summary:We use chiral perturbation theory to evaluate the scattering amplitude for the process \(\pi^+K^-\rightarrow\pi^+K^-\) at leading and next-to-leading orders in the chiral counting and in the presence of isospin breaking effects. We also discuss the influence of the latter on the combination of the \(S\)-wave \(\pi K\) scattering lengths which is relevant for the 2S–2P energy level shift of \(K\pi\) atoms.
ISSN:1434-6044
1434-6052
DOI:10.1007/s100520200902