antinucleon

An antinucleon is the antiparticle of a nucleon, which is either a proton or a neutron. Like other antiparticles, antinucleons have the same mass as their corresponding particles but opposite electric charge and magnetic moment. For instance, the antiproton has a negative charge, while the proton has a positive charge. The antineutron, like the neutron, has no net electric charge, but its magnetic polarity is reversed.12345

When a particle and its antiparticle meet, they annihilate each other, releasing a significant amount of energy. This phenomenon is a fundamental aspect of particle physics and has implications for our understanding of the universe's composition, particularly the matter-antimatter asymmetry.3467