noun
- a subatomic particle that mediates the strong nuclear force between protons and neutrons
Usage: physics
Examples
- The pion was discovered in cosmic ray experiments in 1947.
- Pions play a crucial role in holding atomic nuclei together.
- Scientists studied pion decay in the particle accelerator.
- The charged pion has a mass about 273 times that of an electron.
- Neutral pions decay very quickly into photons.
- Pion exchange between nucleons creates the strong force.