© SLAC National Accelerator Laboratory.
This is a display of tracks of particles emanating from a Z particle produced at the Stanford Linear Collider (SLAC). This picture is viewed "head-on" along the beam line. The collider produced more than half a million Z particles during its seven years of operation, while the Large Electron-Positron collider (LEP), running at the same time, produced over 17 million. (Unit: 2)