#antiparticle

• Antihyperon — The antiparticle corresponding to a hyperon; an unstable baryon with a negative baryon number, composed exclusively of antiquarks, at least one of which is a strange, charm, bottom, or top antiquark. In a structural sense, it possesses the same mass and lifespan as the respective hyperon, but opposite electric charge and strangeness number.
• 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.
• Antineutrino — The antiparticle corresponding to a neutrino; an electrically neutral lepton with an extremely small (or zero) rest mass and half-integer spin, typically emitted during beta-minus decay processes of atomic nuclei. In a structural sense, it possesses an opposite helicity (right-handed) compared to that of the neutrino (left-handed) and interacts extremely weakly with matter.
• Antineutrino — The antiparticle corresponding to the neutrino, characterized by an extremely small (nearly zero) mass, a neutral electric charge, and half-integer spin, possessing an opposite helicity (right-handed) compared to that of the neutrino. This subatomic entity is predominantly emitted during beta-minus decay processes, interacting with matter exclusively through the weak nuclear force and gravity, which makes it extremely difficult to detect.
• Antineutron — The antiparticle corresponding to the neutron, possessing exactly the same mass and spin, but characterized by an opposite baryon number and a magnetic moment of opposite sign relative to the neutron. Although globally electrically neutral, its internal structure is composed of antiquarks (two down antiquarks and one up antiquark), determining its specific annihilation behavior upon contact with ordinary baryonic matter.
• Antiparticle — An elementary particle that has exactly the same mass, lifetime, and spin as a corresponding particle of ordinary matter, but whose electric charges, quantum numbers, and magnetic moments have opposite mathematical signs. Upon direct contact between a particle and an antiparticle, the structural phenomenon of mutual annihilation occurs, converting their entire mass into energy in the form of high-frequency photons.
• Antiton — A hypothetical or experimental elementary particle representing the corresponding antiparticle of a ton, sharing the same mass and spin but possessing an opposite electric charge or quantum number. In advanced quantum physics theories or subatomic structure models, the interaction between a ton and an antiton leads to mutual annihilation with the release of energy waves or high-frequency photons.