You searched for: “meson
meson
1. A class of elementary particles whose masses are generally between those of the lepton class of lighter particles and those of the baryon class of heavier particles.
2. Any member of a family of subatomic particles composed of a quark and an antiquark.

A quark is a group of subatomic particles thought to be among the fundamental constituents of matter; more specifically, of protons and neutrons.

An antiquark is the antiparticle (atoms made up of antiprotons and antineutrons in a nucleus surrounded by positrons) of a quark. When a quark and an antiquark are brought together, mutual annihilation occurs.

This entry is located in the following unit: meso-, mes-, mesi- (page 6)
Word Entries containing the term: “meson
epsilon meson
A neutral scalar meson resonance with positive charge conjugation parity and an approximate mass of 1200 MeV (mega-electron volts).
rho meson
A very short-lived unstable meson with mass 1490 times the mass of an electron.

It plays an essential role in the electrical structure of nucleons.

This entry is located in the following unit: rho; Ρ, ρ + (page 1)