A Natural Model of Spontaneous CP Violation

Abstract

We examine the possibility of building a natural non-supersymmetric model of spontaneous CP violation equipped with the Nelson-Barr (NB) mechanism to address the strong CP problem. Our approach is to utilize a doubly composite dynamics where the first confinement of the CFT occurs at the scale of spontaneous CP violation (SCPV) and the second confinement at the TeV scale. A holographic dual description of this 4D set-up via a warped extra dimension with three 3-branes provides an explicit realization of this idea.In this model, radiative corrections to the strong CP phase are well under control, and the coincidence of mass scales, which we generally encounter in NB models, is addressed. Our model also provides an explanation to the quark Yukawa hierarchies, and a solution to the gauge hierarchy problem just as in the usual Randall-Sundrum model with the Higgs being localized on the TeV brane.

9 pages, 5 figures, model updated, published version

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Cited by in corpus (9)

• Vector-like Singlet Quarks: a Roadmap
• Chiral Nelson--Barr Models: Quality and Cosmology
• Multi-brane cosmology
• Revisiting the Minimal Nelson-Barr Model
• Explicit parametrization of more than one vector-like quark of Nelson-Barr type
• Interplay of ALP Couplings at a Muon Collider
• Variant Nelson-Barr Mechanism with Minimal Flavor Violation
• Spontaneous CP violation, sterile neutrino dark matter, and leptogenesis
• Exploring the Landscape of Spontaneous CP Violation in Supersymmetric Theories