J/psi -- 50th anniversary (IMAGE) DOE/SLAC National Accelerator Laboratory Caption On Nov. 8, 2024, SLAC hosted a symposium to celebrate the 50th anniversary of the J/psi discovery, a key moment in modern particle physics now known as the November Revolution. Credit SLAC National Accelerator Laboratory Usage Restrictions No restrictions. License Public Domain 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.