publication . Other literature type . Article . 1980

Can confinement ensure natural CP invariance of strong interactions?

Mikhail "Misha" Shifman; Arkady Vainshtein; Valentin I. Zakharov;
Open Access
  • Published: 01 Apr 1980
  • Publisher: Elsevier BV
Abstract
Abstract 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.
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Subjects
arXiv: High Energy Physics::PhenomenologyHigh Energy Physics::LatticeHigh Energy Physics::Experiment
free text keywords: Physics, Eta meson, Particle physics, Axino, Quantum chromodynamics, Observable, Axion, Axion Dark Matter Experiment, Strong CP problem, Pseudoscalar meson
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