Solutions to the strong CP problem in a world with gravity

1992/03/09 by R. Holman, S. D. H. Hsu, T. Kephart +3 · 4 citations
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1016/0370-2693(92)90491-l

published as Phys.Lett.B282:132-136,1992 · 10 pages

arxiv created 1992/03/09 · arxiv updated 2010/11/01

Abstract

We examine the sensitivity of several solutions of the strong-CP problem to violations of global symmetries by Planck scale physics. We find that the Peccei-Quinn solution is extremely sensitive to U(1)_PQ violating operators of dimension less than 10. We construct models in which the PQ symmetry is protected by gauge symmetries to the requisite level.

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