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Solving the Strong CP Problem with Discrete Symmetries and the Right Unitarity Triangle

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arxiv 1307.0710 v2 pith:Q53VBHTY submitted 2013-07-02 hep-ph

Solving the Strong CP Problem with Discrete Symmetries and the Right Unitarity Triangle

Stefan Antusch , Martin Holthausen , Michael A. Schmidt , Martin Spinrath This is my paper
classification hep-ph
keywords quarkstrongdiscretemassmatricesmodelproblemreal
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We present a solution to the strong CP problem based on spontaneous CP violation and discrete family symmetries. The model predicts in a natural way the almost right-angled quark unitarity triangle angle ($\alpha \simeq 90^\circ$) by making the entries of the quark mass matrices either real or imaginary. By this choice the determinants of the mass matrices are rendered real and hence the strong CP phase vanishes. We present a toy model for the quark sector that demonstrates the viability of our approach.

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