K_L -> pi0 gamma e+ e- and its relation to CP and chiral tests

Details K_L -> pi0 gamma e+ e- and its relation to CP and chiral tests K_L -> pi0 gamma e+ e- and its relation to CP and chiral tests

1997-02-06

arxiv.org/abs/hep-ph/9702278v3

Phys.Rev. D56 (1997) 1605-1611

Physics

High Energy Physics

High Energy Physics - Phenomenology

Some misprints corrected, results unchanged. 12 pages, 7 eps figures. Version accepted for publication on Phys, Rev. D. LaTeX,

Scientific paper

10.1103/PhysRevD.56.1605

The decay K_L -> pi0 gamma e+ e- occurs at a it higher rate than the nonradiative process K_L -> pi0 e+ e-, and hence can be a background to CP violation studies using the latter reaction. It also has an interest in its own right in the context of chiral perturbation theory, through its relation to the decay K_L -> pi0 gamma gamma. The leading order chiral loop contribution to K_L -> pi0 gamma e+ e-, including the [q(e+) + q(e-)]^2/m^2(pi) dependence, is completely calculable. We present this result and also include the higher order modifications which are required in the analysis of K_L -> pi0 gamma gamma.

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