Phys. Rev. Lett. 91, 162001 (2003) [4 pages]Isospin Violation in ϵ′Received 3 July 2003; published 17 October 2003 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 K0→2π decays is performed. We find a destructive interference between three different sources of isospin violation in the CP violation parameter ϵ′. Within the uncertainties of large-Nc estimates for the low-energy constants, the isospin violating correction for ϵ′ is below 15%. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.162001
DOI:
10.1103/PhysRevLett.91.162001
PACS:
12.39.Fe, 11.30.Er, 13.25.Es
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