Previously, top quarks had only been observed when produced by the strong nuclear force. |
They do not feel the strong nuclear force. |
Then similar wisdom was applied to the strong nuclear force to yield quantum chromodynamics, or QCD, and this theory was also renormalizable. |
The strong nuclear force, not observed at the familiar macroscopic scale, is the most powerful force over subatomic distances. |
We never directly experience the strong nuclear force. |
Light is carried by photons, gravity by gravitons, the strong nuclear force by gluons. |