# 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} }

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.

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## References

SHOWING 1-6 OF 6 REFERENCES

### 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

### Phys. Rev. D

- Phys. Rev. D
- 1976

### 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