antimatterrelated
Antimatter refers to particles that have the same mass as their matter counterparts but opposite electric charge and other quantum numbers. When a particle meets its corresponding antiparticle, they annihilate each other, typically producing photons and, in some cases, other particle-antiparticle pairs. The best known example is the positron, the antiparticle of the electron. Antiprotons, antineutrons, and other antiparticles have been observed in laboratories and in cosmic rays.
Antimatter can be produced in high-energy collisions, nuclear reactions, and certain radioactive decays. Modern accelerators routinely
Antimatter has practical uses and is central to fundamental physics. Positrons are used in medical imaging,
Cosmologically, the universe appears to contain far more matter than antimatter, a disparity known as baryon