Isospin violation in epsilon'

Details Isospin violation in epsilon' Isospin violation in epsilon'

2003-07-02

arxiv.org/abs/hep-ph/0307030v1

Phys.Rev.Lett. 91 (2003) 162001

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages

Scientific paper

10.1103/PhysRevLett.91.162001

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 %.

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