Peccei-Quinn theory

proper noun

A proposal for the resolution of the strong CP problem. It proposes that the QCD Lagrangian be extended with a CP-violating term known as the θ parameter, and that this should be a dynamic field rather than a constant value. It also predicts the existence of particles called axions.

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Meanings

proper noun
  1. particlenatural sciencesA proposal for the resolution of the strong CP problem. It proposes that the QCD Lagrangian be extended with a CP-violating term known as the θ parameter, and that this should be a dynamic field rather than a constant value. It also predicts the existence of particles called axions.

Origin

Formulated by Roberto Peccei and Helen Quinn.

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Cite this entry
APA

Peccei-Quinn theory. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Peccei-Quinn%20theory

MLA

“Peccei-Quinn theory.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Peccei-Quinn%20theory. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Peccei-Quinn theory,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Peccei-Quinn%20theory.

Source: Peccei-Quinn theory on Wiktionary, CC BY-SA 4.0.