Isospin Breaking in Low-Energy Charged Pion and Kaon Elastic Scattering

Details Isospin Breaking in Low-Energy Charged Pion and Kaon Elastic Scattering Isospin Breaking in Low-Energy Charged Pion and Kaon Elastic Scattering

2001-11-16

arxiv.org/abs/hep-ph/0111212v1

Eur.Phys.J.C23:707-718,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, LATEX2e, 2 figures, 2 tables

Scientific paper

10.1007/s100520200902

We use chiral perturbation theory to evaluate the scattering amplitude for the process Pi^+ K^- to 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 levels shift of K Pi atoms.

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