November Revolution
New quark discovered in 1974: charm
Sam Ting leads discovery of a resonance in proton-nucleon collisions at Brookhaven National Laboratory: calls it the J particle
Burt Richter leads discovery of a resonance at an e+e- collider at SLAC: calls it the Psi particle
Richter, Ting share 1976 Nobel prize
Example of charmonium
- Bound state of c c
- Like positronium (e+e-) but for strong force
- In other words, like H atom
Higher mass excited states exist also, like ? ‘