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1. One of the four fundamental interactions of nature, mediated by the intermediate vector bosons and acting on leptons and quarks. It is responsible for the decay of many hadrons, for the beta decay of nuclei, and for the interactions of neutrinos. The weak interaction is weaker than the strong and electromagnetic interactions, but stronger than the gravitational interaction.
2. An instance of this interaction.
(General Physics) physics an interaction between elementary particles that is responsible for certain decay processes, operates at distances less than about 10–15 metres, and is 1012 times weaker than the strong interaction. The weak interaction and electromagnetic interactions are now described by the unifying electroweak theory. Also called: weak nuclear interaction or weak nuclear force See interaction2, electroweak interaction
the interaction between elementary particles and the three intermediate vector bosons that carry the weak force.
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|Noun||1.||weak interaction - (physics) an interaction between elementary particles involving neutrinos or antineutrinos that is responsible for certain kinds of radioactive decay; mediated by intermediate vector bosons|
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"