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Journal Article

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

##### MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30612

Holthausen,  Martin
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

##### Fulltext (public)

1307.0710.pdf
(Preprint), 445KB

##### Supplementary Material (public)
There is no public supplementary material available
##### Citation

Antusch, S., Holthausen, M., Schmidt, M. A., & Spinrath, M. (2013). Solving the Strong CP Problem with Discrete Symmetries and the Right Unitarity Triangle. Nuclear Physics B, 877(3), 752-771. doi:10.1016/j.nuclphysb.2013.10.028.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-B55B-0
##### Abstract
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.