pion
/ˈpʌɪɒn
/noun Physics
A meson having a mass approximately 270 times that of an electron. Also called pi-meson.The proton and the neutron are baryons; the electron, the muon, and the neutrino are leptons; whilst the pions are mesons....
- Kaons and pions are examples of particles known as mesons, which contain a quark and an antiquark.
- He worked primarily on the interaction of pions with protons.
Derivatives
pionic
- In other words, the pionic system, having its specific ground state and elementary pionic excitations converts rapidly into free pions.
- Pionic atoms are exotic systems in which a negatively charged pion is bound in an atom-like orbital.
Origin
1950s: from pi1 (the letter used as a symbol for the particle) + -on.