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arXiv · 1007.4496

Kaon Decay into Three Photons Revisited

Shu-Yu Ho·Jusak Tandean
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Abstract

We evaluate the rare radiative kaon decays K_{L,S} -> 3 gamma. Applying the requirements of gauge invariance and Bose symmetry, we derive a general form of the decay amplitude, including both parity-conserving and parity-violating contributions. We employ a chiral-Lagrangian approach combined with dimensional analysis arguments to estimate the branching ratios of these decays in the standard model, obtaining values as large as B(K_L -> 3 gamma) ~ 1 x 10^{-14} and B(K_S -> 3 gamma) ~ 2 x 10^{-17}, which exceed those found previously by a few orders of magnitude. Measurements on the branching ratios which are significantly larger than these numbers would likely hint at the presence of new physics beyond the standard model.

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Shu-Yu Ho, Jusak Tandean. 2010-07-26. Kaon Decay into Three Photons Revisited. https://doi.org/10.1103/physrevd.82.114010

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