Constraints imposed by CP conservation in the presence of pseudoparticles

R. D. Peccei and Helen R. Quinn
Phys. Rev. D 16, 1791 – Published 15 September 1977
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We elaborate on an earlier discussion of CP conservation of strong interactions which includes the effect of pseudoparticles. We discuss what happens in theories of the quantum-chromodynamics type when we include weak and electromagnetic interactions. We find that strong CP conservation remains a natural symmetry if the full Lagrangian possesses a chiral U(1) invariance. We illustrate our results by considering in detail a recent model of (weak) CP nonconservation.

  • Received 31 May 1977


©1977 American Physical Society

Authors & Affiliations

R. D. Peccei and Helen R. Quinn*

  • Institute of Theoretical Physics, Department of Physics, Stanford University, Stanford, California 94305

  • *Work supported in part by the A. P. Sloan Foundation. On leave from Physics Dept., Harvard University, Cambridge, Mass. 02138.

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Vol. 16, Iss. 6 — 15 September 1977

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