running coupling

noun

A coupling whose strength measurement appears to deviate from its true value as the energy scale at which it is probed shrinks, the deviation being a consequence of higher-order interaction terms and associated renormalization issues becoming relevant; metaphorically, a coupling whose strength "runs" from its limiting macroscopic value.

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Meanings

nounrunning coupling (plural running couplings)

plural running couplings

  1. natural sciencesA coupling whose strength measurement appears to deviate from its true value as the energy scale at which it is probed shrinks, the deviation being a consequence of higher-order interaction terms and associated renormalization issues becoming relevant; metaphorically, a coupling whose strength "runs" from its limiting macroscopic value.
Cite this entry
APA

running coupling. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/running%20coupling

MLA

“running coupling.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/running%20coupling. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “running coupling,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/running%20coupling.

Source: running coupling on Wiktionary, CC BY-SA 4.0.