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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

Sudhakantha Girmohanta , Seung J. Lee , Yuichiro Nakai , Motoo Suzuki This is my paper · ORCID
classification hep-phhep-th
keywords modelspontaneousviolationconfinementnaturalproblemprovidesscale
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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

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The absence of global anomalies of CP symmetry

    hep-ph 2026-02 conditional novelty 7.0 of 10

    Gauged CP symmetry in four dimensions introduces no new global anomalies for connected, simply-connected gauge groups; the standard model matter content is anomaly-free under a gauged CP.

  2. Upper Bound on Parity Breaking Scale for Doublet WIMP Dark Matter

    hep-ph 2025-07 conditional novelty 6.0 of 10

    In a Parity-symmetric extension of the Standard Model with doublet-pair WIMP dark matter, thermal relic abundance requires the Parity breaking scale to be below 25-60 TeV.

  3. Domain walls in Nelson-Barr axion model

    hep-ph 2024-12 conditional novelty 6.0 of 10

    The QCD instanton potential can act as a bias that collapses the domain walls of the Nelson-Barr axion, dynamically selecting the CP-conserving vacuum and yielding either dark matter or a NANOGrav-range gravitational ...

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