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Non-leptonic kaon decays and the chiral anomaly

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Non-leptonic kaon decays and the chiral anomaly

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Ecker, Gerhard; Neufeld, Helmut; Pich Zardoya, Antonio Perfil

This document is a artículoDate1994

Este documento está disponible también en : http://hdl.handle.net/10550/42285

An investigation is performed of all non-leptonic kaon decays sensitive to the chiral anomaly. Within the framework of chiral perturbation theory, there are two classes of anomalous amplitudes at O(p4): reducible and direct contributions. Only radiative transitions are affected by the anomaly. The phenomenology of the decays K(L) --> pi+pi-gamma and K+ --> pi+pi0gamma is studied in detail. Including the dominant contributions of O(p6), the experimentally observed dependence of the direct emission amplitude for K(L) --> pi+pi-gamma on the photon energy can be understood. A survey is made of the rare ''anomalous'' decays K --> pipigammagamma and K --> 3pigamma(gamma), including some numerical estimates.

Ecker, Gerhard Neufeld, Helmut Pich Zardoya, Antonio 1994 Non-leptonic kaon decays and the chiral anomaly Nuclear Physics B 413 1-2 321 352

http://dx.doi.org/10.1016/0550-3213(94)90623-8