
The SciencesFebruary 1, 1991
The Number of Families of Matter
How experiments at CERN and SLAC, using electron-positron collisions, showed that there are only three families of fundamental particles in the universe

The Number of Families of Matter
How experiments at CERN and SLAC, using electron-positron collisions, showed that there are only three families of fundamental particles in the universe

Quarkonium
An "atom" made up of a heavy quark and an antiquark provides the best available system for examining the forces that bind together the elementary constituents of subnuclear particles