$K^0 $ Decays into Three Photons

Details $K^0 $ Decays into Three Photons $K^0 $ Decays into Three Photons

1994-02-03

arxiv.org/abs/hep-ph/9402216v1

Phys.Lett. B327 (1994) 145-148

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX (1 figure appended as postscript file). A complete postscript file is available via anonymous ftp at ttpux2.physik.uni-k

Scientific paper

10.1016/0370-2693(94)91542-3

The decays $K_{L,S} \to 3 \gamma $ are not forbidden by any selection rules or symmetry principles. However, gauge invariance and Bose statistics dictate that every photon pair in these transitions has at least two units of angular momentum. This gives rise to an extraordinary suppression. Using a simple model, we obtain the branching ratios $B(K_L \to 3 \gamma) \sim 3 \cdot 10^{-19}$, $B(K_S \to 3 \gamma) \sim 5 \cdot 10^{-22} $.

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