Can confinement ensure natural CP invariance of strong interactions?

Research output: Contribution to journalArticlepeer-review

1844 Scopus citations


P- and T-invariance violation in quantum chromodynamics due to the so-called θ-term is discussed. It is shown that irrespectively of how the confinement works there emerge observable P- and T-odd effects. The proof is based on the assumption that QCD resolves the U(1) problem, i.e., the mass of the singlet pseudoscalar meson does not vanish in the chiral limit. We suggest a modification of the axion scheme which restores the natural P and T invariance of the theory and cannot be ruled out experimentally.

Original languageEnglish (US)
Pages (from-to)493-506
Number of pages14
JournalNuclear Physics, Section B
Issue number3
StatePublished - Apr 28 1980


Dive into the research topics of 'Can confinement ensure natural CP invariance of strong interactions?'. Together they form a unique fingerprint.

Cite this