K→3π decays in chiral perturbation theory Original Research Article

The CP conserving amplitudes for the decays K→3π are calculated in chiral perturbation theory at the next-to-leading order. We present the expressions in a compact form with single parameter functions only. These expressions are then fitted to all available K→2π and K→3π data to obtain a fit of the parameters that occur. We compare with the work of Kambor, Missimer and Wyler.