Particles composed of a quark and an antiquark; the lowest mass mesons (the pi and K mesons) have masses intermediate between leptons and baryons. All mesons are unstable.
- Lepton - Text by M. Alan Kazlev
Subatomic particle that is susceptible to the weak nuclear force but not the strong force (the force that binds an atomic nucleus together). There are six leptons: the electron, muon, tau, electron neutrino, muon neutrino, and tau neutrino.
- Meson Gun - Text by M. Alan Kazlev and Richard Baker
Hi-tech particle beam weapons that create high energy mesons and direct them at targets. The device, which is usually mounted on a ship or combat remotes, uses the collision of electrons (matter) and positrons (amat) creates pi neutral mesons. Being electrically neutral, these particle beams are not deflected by magnetic fields, and do not disperse as fast as charged particle beams.
- Pi-zero Meson - Text by Richard Baker
Meson with neutral electric charge. Pi-zero mesons can be produced by electron-positron collisions and can decay back into an electron-positron pair, but they are not a bound state of an electron and a positron. The electron and positron annihilate to form a virtual photon and that then decays into a quark and antiquark, which form the meson.
- Quark - Text by M. Alan Kazlev
The fundamental particles of hadronic matter such as protons, neutrons and mesons. There exist six 'flavors' of quarks: up, down, strange, charm, top and bottom. They are confined to hadrons by the strong force.