Belle II Detector (IMAGE) Max Planck Institute for Physics Caption Model of the Belle II detector: Electrons and their antiparticles, the positrons, are accelerated in the SuperKEKB ring and collide in Belle II's core. Credit KEK/Belle II Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.