Spontaneous CP violation and the strong CP problem

Abstract

We derive sufficient conditions that guarantee a robust solution of the strong CP problem in theories with spontaneous CP violation, and introduce a class of models satisfying these requirements. In the simplest scenarios the dominant contribution to the topological angle arises at 3-loop order in the Yukawa couplings. A variety of realizations are possible on a warped extra dimension, which can simultaneously address the Planck-TeV hierarchy. Experimental signatures of this approach to the strong CP problem include flavor violation and vector-like partners of the top or bottom quarks.

17 pages + Appendix, 3 figures, JHEP style

References in corpus (4)

• Anomalous solutions to the strong CP problem
• Search for pair and single production of new heavy quarks that decay to a $Z$ boson and a third-generation quark in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Phenomenology of a light scalar: the dilaton
• Reexamination of The Standard Model Nucleon Electric Dipole Moment

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