Isospin violation in epsilon'

Abstract

On the basis of a next-to-leading-order calculation in chiral perturbation theory, the first complete analysis of isospin breaking for direct CP violation in K^0 -> 2 pi decays is performed. We find a destructive interference between three different sources of isospin violation in the CP violation parameter epsilon'. Within the uncertainties of large-N_c estimates for the low-energy constants, the isospin violating correction for epsilon' is below 15 %.

4 pages

References in corpus (3)

• Meson resonances, large N_c and chiral symmetry
• Delta I=1/2 and epsilon'/epsilon in Large-Nc QCD
• Improved Determination of the Electroweak Penguin Contribution to epsilon'/epsilon in the Chiral Limit

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