A measure of the strength of interaction between two particles, or between a particle and a field.
More example sentences
- Newton's constant is the coupling constant for the gravitational force, for example.
- For electromagnetism, the coupling constant is called the fine structure constant a and is formed by the electron charge, Planck's constant and the speed of light.
- But its predictions for the coupling constants - the constants that describe the strengths of the strong, weak and electromagnetic interactions - were wrong.
Definition of coupling constant in:
- The British & World English dictionary