# CP Conservation in the Presence of Pseudoparticles

@article{Peccei1977CPCI,
title={CP Conservation in the Presence of Pseudoparticles},
author={Roberto D. Peccei and Helen R. Quinn},
journal={Physical Review Letters},
year={1977},
volume={38},
pages={1440-1443}
}
• Published 20 June 1977
• Physics
• Physical Review Letters
We give an explanation of the $\mathrm{CP}$ conservation of strong interactions which includes the effects of pseudoparticles. We find it is a natural result for any theory where at least one flavor of fermion acquires its mass through a Yukawa coupling to a scalar field which has nonvanishing vacuum expectation value.
3,719 Citations
The strong CP problem and axions Seminar
• Physics
• 2017
We investigate the possibility of CP symmetry violation in strong interactions, also called the strong CP problem. We show how the problem arises in the theory of quantum chromodynamics and its
Effective Field Theory Techniques Applied to the Properties of the Axion
• Physics
• 2015
We utilize the effective field theory approach to study the properties of the axion. In particular, with s as well as u and d quarks regarded to be relatively light we derive a formula for the mass
Interaction of axions with relativistic spinning particles
• Physics
• 2016
We consider a covariant phenomenological model, which describes an interaction between a pseudoscalar (axion) field and massive spinning particles. The model extends the Bagrmann-Michel-Telegdy
Geometrodynamics and charge-like unification: On the vanishing of C, CP violation in QCD, in the limit GF → 0
• P. Minkowski
• Physics
International Journal of Modern Physics A
• 2018
We present two original derivations of the restoration of C and CP symmetry within QCD, simplest in “standalone QCD” but extendable to include conserved QED, in the limit [Formula: see text]

## References

SHOWING 1-8 OF 8 REFERENCES
Phys. Rev. D
• Phys. Rev. D
• 1976
Phys. Rev. Lett
• Phys. Rev. Lett
• 1976
Phys. Rev. Lett
• Phys. Rev. Lett
• 1973
This fact has been previously discussed in other contexts by L. Schulman, Phys. Bev
• This fact has been previously discussed in other contexts by L. Schulman, Phys. Bev
• 1968
Bjorken for useful discussions
• Bjorken for useful discussions
Work supported in part by National Science Foundation Grants No. PHY 75-18444 and No
• Work supported in part by National Science Foundation Grants No. PHY 75-18444 and No