Constraints imposed by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>CP</mml:mi></mml:math>conservation in the presence of pseudoparticles
R.D. PecceiInstitute of Theoretical Physics, Department of Physics, Stanford University, Stanford, California 94305Helen R. QuinnInstitute of Theoretical Physics, Department of Physics, Stanford University, Stanford, California 94305
1977en
ABI
Abstract
We elaborate on an earlier discussion of $\mathrm{CP}$ 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 $\mathrm{CP}$ 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) $\mathrm{CP}$ nonconservation.
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