2024/10/28 by Taku Yamanaka, Yamanaka, Taku
Physics and Astronomy · #Atomic and Subatomic Physics Research #Astro and Planetary Science #Dark Matter and Cosmic Phenomena
paper · pdf · doi:10.48550/arxiv.2410.20721
After CP violation was discovered in the KL → π+π- decay, many theories were proposed to explain it, and the Kobayashi-Maskawa model and the Superweak model lasted for many years as strong candidates. High-precision kaon experiments with many new techniques and improvements rejected the Superweak model and supported the Kobayashi-Maskawa model in 1990's. After then, rare kaon decay experiments are studying KL → π0νν decays to search for CP violation caused by new physics beyond the Standard Model. Various techniques have been developed to increase the sensitivity and to suppress backgrounds.