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| Standard Model of particle physics |
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In nuclear physics and particle physics, the weak interaction, also called the weak force is one of the four known fundamental interactions, with the others being electromagnetism, the strong interaction, and gravitation. It is the mechanism of interaction between subatomic particles that is responsible for the radioactive decay of atoms: The weak interaction participates in nuclear fission and nuclear fusion. The theory describing its behaviour and effects is sometimes called quantum flavourdynamics (QFD); however, the term QFD is rarely used, because the weak force is better understood by electroweak theory (EWT).[1]
The effective range of the weak force is limited to subatomic distances and is less than the diameter of a proton.[2]
- ^ Griffiths, David (2009). Introduction to Elementary Particles. pp. 59–60. ISBN 978-3-527-40601-2.
- ^ Schwinger, Julian (1 November 1957). "A theory of the fundamental interactions". Annals of Physics. 2 (5): 407–434. Bibcode:1957AnPhy...2..407S. doi:10.1016/0003-4916(57)90015-5. ISSN 0003-4916.