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

Johan Bijnens·Fredrik Borg
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Abstract

The CP conserving amplitudes for the decays $K\to3π$ 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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Johan Bijnens, Fredrik Borg. 2004-05-04. Isospin Breaking in $K\to3π$ Decays I: Strong Isospin Breaking. https://doi.org/10.1016/j.nuclphysb.2004.07.011

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