This left nuclear interactions of very energetic cosmic rays with atmospheric nuclei as the only possible source.

However, later particle physics experiments showed that the muon did not participate in the strong nuclear interaction.

Thus, the strong nuclear interaction results from the exchange of pions, which are 270 times as massive as electrons.

The weak nuclear interaction results from the ex- change of even more massive W-particles (which haven't been detected yet, by the way).

With a stronger nuclear interaction, it seems obvious that the fusion of small nuclei would take place more readily.

Because of the Pumping, the strong nuclear interaction is growing steadily stronger in our Universe at every moment.

Pions are the mediating particles of the strong nuclear interaction.

These natural elements can be assigned to the parts weak current that the strong nuclear interaction conserve.

Weak nuclear interactions, physicists discovered, actually have a slight left-handed bias.

This ability to "point back" at the sun was the first conclusive evidence that the sun is powered by nuclear interactions in the core.