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Tests of Chiral Perturbation Theory in Rare Kaon Decays

Rainer Wanke
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Abstract

The neutral Kaon decays Ks->gamma gamma and Kl->pi0 gamma gamma are very sensitive to higher order loop effects of Chiral Perturbation Theory (ChPT). New measurements of the NA48 experiment show that ChPT contributions of O(p^6) cannot be neglected in these modes. In addition a new measurement of the related decay Kl->gamma gamma and an upper limit of the rate of Ks->pi0 gamma gamma are presented.

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Rainer Wanke. 2002-07-01. Tests of Chiral Perturbation Theory in Rare Kaon Decays. https://arxiv.org/abs/hep-ex/0207008

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