👉 In particle physics, an antineutrino is a fundamental entity that describes neutrinos in their absence. In this context, "antinucleon" refers to a hypothetical type of particle that has no nuclear charge. These particles are often referred to as "anti-neutrinos," as they have the opposite charge of a neutron and thus cannot be protons or neutrons but instead exhibit properties similar to those of anti-particles. In quantum mechanics, antinucleons play an important role