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

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Fajfer, S. [Max-Planck-Institut für Physik und Astrophysik, München] Gérard, Jean-Marc [UCL] Fajfer, S. [Max-Planck-Institut für Physik und Astrophysik, München]

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.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 1989
Language Anglais
Journal information "Zeitschrift für Physik C Particles and Fields" - Vol. 42, no. 3, p. 425-430 (1989)
Publisher Springer-Verlag
e-issn 1434-6052
issn 0170-9739
Publication status Publié
Affiliations Max-Planck-Institut für Physik und Astrophysik, München
UCL - SST/IRMP - Institut de recherche en mathématique et physique
Links
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Bibliographic reference Fajfer, S. ; Gérard, Jean-Marc ; Fajfer, S.. A simple chiral Lagrangian approach toK→πππ decays andε′+0−. In: Zeitschrift für Physik C Particles and Fields, Vol. 42, no. 3, p. 425-430 (1989)
Permanent URL http://hdl.handle.net/2078.1/73435