Mirror matter admixtures in K_L \to γγ

Details Mirror matter admixtures in K_L \to γγ Mirror matter admixtures in K_L \to γγ

2004-02-18

arxiv.org/abs/hep-ph/0402199v1

Mod.Phys.Lett. A19 (2004) 3019

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1142/S0217732304015427

Based on possible albeit tiny, admixtures of mirror matter in ordinary mesons we study the K_L \to \gamma\gamma transition. We find that this process can be described with a small SU(3) symmetry breaking of only 3%. We also determine the eta-eta' mixing angle and the pseudoscalar decay constants. The results for these parameters are consistent with some obtained in the literature. They favor two recent determinations; one based on two analytical constraints, and another one based on next-to-leading order power corrections.

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