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A Natural Model of Spontaneous CP Violation

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arxiv 2203.09002 v3 pith:44S4W46S submitted 2022-03-17 hep-ph hep-th

A Natural Model of Spontaneous CP Violation

Sudhakantha Girmohanta , Seung J. Lee , Yuichiro Nakai , Motoo Suzuki This is my paper
classification hep-ph hep-th
keywords modelspontaneousviolationconfinementnaturalproblemprovidesscale
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 3 Pith papers

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  1. Transient Bias for CP Domain Wall Decay and Dark Matter

    hep-ph 2026-06 unverdicted novelty 6.0

    A new scalar induces transient bias to decay CP domain walls from spontaneous CP violation while its oscillations constitute dark matter.

  2. Specially Embedding a Composite Axion Model

    hep-ph 2026-04 unverdicted novelty 6.0

    Special embedding of the composite axion and QCD gauge groups into a larger product gauge group reduces the domain wall number to unity and induces a controlled bias term from UV instantons that destabilizes the walls.

  3. Exploring the Landscape of Spontaneous CP Violation in Supersymmetric Theories

    hep-ph 2025-10 unverdicted novelty 5.0

    Spontaneous CP violation is realized in SUSY via an extended spurion formalism in the exact limit and a model with intermediate-scale breaking along pseudo-flat directions stabilized by soft terms and non-perturbative...