The Search for $K_L\to {\pi }^0{\pi }^0\gamma \gamma$ and $K_L\to {\pi }^0{\pi }^{0}X$ where $X\to 2\gamma$ at the KOTO Experiment

J. Redeker, C. Lin, Y. W. Wah +23

We performed searches for $K_L\to {\pi }^0{\pi }^{0}X$ where $X$ may be an axion-like particle which promptly decays to two photons, and the first search for $K_L\to {\pi }^0{\pi }^0\gamma \gamma$…