#hadron decay
- Antimeson — The antiparticle corresponding to a meson; an unstable boson-type hadron structurally composed of an inverted symmetrical pair consisting of a quark and an antiquark, possessing the same mass and spin as the respective meson, but opposite electric charge, strangeness, charm, or isospin. In an experimental sense, the collision between a meson and an antimeon leads to their mutual quantum annihilation.