KTeV Results on Chiral Perturbation Theory

Details KTeV Results on Chiral Perturbation Theory KTeV Results on Chiral Perturbation Theory

2006-10-25

arxiv.org/abs/hep-ex/0610078v1

ECONFC0610161:010,2006

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 8 figures. Contribution to the proceedings of HQL06

Scientific paper

The KTeV experiment has carried out a broad program of studies of rare kaon decays. In this paper we present results on KL -> pi0 gamma gamma, KL -> pi0 e+ e- gamma and KL -> pi0 pi0 gamma. These decays provide a window for testing chiral perturbation theory at O(p^6). We find BR(KL-> pi0 pi0 gamma) = (1.30 +/- 0.03 +/- 0.04)E-6, BR(KL-> pi0 e+ e- gamma) = (1.90 +/- 0.16 +/- 0.12)E-8, and set the limit BR(KL->pi0 pi0 gamma)< 2.32E-7. The KTeV measurements are competitive with or better than the world's best results in these decays.

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