KEKB, or the KEK B-Factory, is a particle accelerator facility located in Tsukuba, Japan, that was primarily designed to collide electrons and positrons at high energies. It was developed to enhance the study of B mesons and the phenomena of CP violation, which have important implications for our understanding of the matter-antimatter asymmetry in the universe. The KEKB accelerator has two main rings: the high-energy ring (HER) and the low-energy ring (LER).
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