antihadrona

Antihadron is a hypothetical antimatter particle that is composed of antiquarks bound together by gluons, analogous to how hadrons are composed of quarks. Just as hadrons are categorized into baryons (three quarks) and mesons (a quark and an antiquark), antihadrons can be antinucleons or antimesons. Antiprotons, for example, are antihyperons made of two up antiquarks and one down antiquark. Antineutrons are also antihyperons, composed of one up antiquark and two down antiquarks. Antimesons would consist of an antiquark and a quark. Like other antiparticles, antihadrons have the same mass as their corresponding hadrons but opposite charge and other quantum numbers. When an antihadrons encounters its corresponding hadron, annihilation occurs, releasing energy in the form of photons or other particle-antiparticle pairs. The existence of antihadrons is a consequence of the symmetry between matter and antimatter predicted by quantum field theory. While individual antiquarks and antileptons have been observed, the creation of complex antihadrons in experiments requires high energies. Scientists have successfully produced and studied antiprotons and some other antihadrons in particle accelerators, providing crucial tests of fundamental physics principles.