interaction of a positron and an electron results in annihilation
3
interaction of a particle and its antiparticle results in annihilation and the production of radiant energy
4
n a formal organization of people or groups of people n the act of consorting with or joining with others n the state of being connected together as in memory or imagination n the process of bringing ideas or events together in memory or imagination n a social or business relationship n a relation resulting from interaction or dependence n (chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding n (ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species
5
any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions
