Isospin Breaking in $K\to3π$ Decays I: Strong Isospin Breaking

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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25 pages, 7 figures

Scientific paper

10.1016/j.nuclphysb.2004.07.011

The CP conserving amplitudes for the decays $K\to3\pi$ are calculated in Chiral Perturbation Theory. The calculation is made at the next-to-leading order including strong and local electromagnetic isospin breaking. A comparison is made between the squared amplitudes with and without isospin violation to estimate the size of the effect. We find corrections of order five percent in the amplitudes.

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