Swipe left and right to see more photos

1 (of 3) SLAC's Burton Richter and MIT's Samuel Ting at a SLAC symposium in 1984, celebrating the 10th anniversary of the J/psi discovery.

Photo: Archives, History & Records Office/SLAC National Accelerator Laboratory

Swipe left and right to see more photos

2 (of 3) On 11 November, 1974, two research teams announced they had independently of each other discovered a new subatomic particle, J/psi. While the teams performed their experiments, the J/psi popped up as a bump in the data where none was expected.

Photo: Archives, History & Records Office/SLAC National Accelerator Laboratory

Swipe left and right to see more photos

3 (of 3) SLAC's SPEAR collider, 1975. Here, a SLAC/Berkeley Lab team found a new subatomic particle, J/psi, when crashing electron and positron beams into each other.

Photo: Archives, History & Records Office/SLAC National Accelerator Laboratory