Isospin Breaking in Low-Energy Charged Pion and Kaon Elastic Scattering
High Energy Physics - Phenomenology
2011-09-13 v1
Abstract
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.
Keywords
Cite
@article{arxiv.hep-ph/0111212,
title = {Isospin Breaking in Low-Energy Charged Pion and Kaon Elastic Scattering},
author = {A. Nehme},
journal= {arXiv preprint arXiv:hep-ph/0111212},
year = {2011}
}
Comments
23 pages, LATEX2e, 2 figures, 2 tables