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arXiv · 2412.00196

Spontaneous CP Violation and Flavor Changing Neutral Currents in Minimal SO(10)

Xiyuan Gao
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Abstract

We explore spontaneous CP violation (SCPV) in the minimal non-supersymmetric SO(10) grand unified theory (GUT), with a scalar sector comprising a CP-even $45_H$, a $126_H$, and a complex $10_H$. All renormalizable couplings are real due to CP symmetry, and the Kobayashi-Maskawa phase arises solely from complex electroweak vacuum expectation values. The model requires an additional Higgs doublet fine-tuned below 500 GeV and constrains new Yukawa couplings, linking certain flavor-violating (FV) processes. Future proton decay observations may reveal correlated FV decay ratios, offering insights into minimal SO(10).

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Xiyuan Gao. 2024-11-29. Spontaneous CP Violation and Flavor Changing Neutral Currents in Minimal SO(10). https://doi.org/10.1103/physrevd.111.055013

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