A simple chiral Lagrangian approach toK→πππ decays andε′+0−

Fajfer, S.;Gérard, Jean-Marc;Fajfer, S.
(1989) Zeitschrift für Physik C Particles and Fields — Vol. 42, n° 3, p. 425-430 (1989)

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Authors
  • Fajfer, S.Max-Planck-Institut für Physik und Astrophysik, München
    Author
  • Gérard, Jean-MarcUCLouvain
    Author
  • Fajfer, S.Max-Planck-Institut für Physik und Astrophysik, München
    Author
Abstract
We analyse the K~nrcn decays in the framework of a chiral Lagrangian supplemented by the 1IN expansion (N being the number of colors). The measured KL--*n+Tz~ - Dalitz plot is very well reproduced. Contrary to a recent claim, the Li-Wolfenstein relation between the CP impurities associated with the K ~ nnn(e'+ o-) and the K ~ rcn(e') decay amplitudes is rather stable against isospinbreaking effects and higher-order (in the chiral expansion) weak operator corrections. We also predict a branching ratio of 2.1 10 -7 for the CP-conserving K s ~ n + ~~ decay.
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Fajfer, S., Gérard, J.-M., & Fajfer, S. (1989). A simple chiral Lagrangian approach toK→πππ decays andε′+0−. Zeitschrift für Physik C Particles and Fields, 42(3), 425-430. https://doi.org/10.1007/BF01548447 (Original work published 1989)