Challenge for spontaneous CP violation in Type IIB orientifolds with fluxes

Tatsuo Kobayashi, Hajime Otsuka

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29 Citations (Scopus)


We systematically investigate the possibilities of realizing the spontaneous CP violation in Type IIB flux compactifications on toroidal orientifolds. Our detailed analysis for a generic choice of three-form fluxes leads to the presence of flat directions, where CP-breaking and -conserving vacua are degenerate, indicating that flux compactifications are not sufficient to realize the spontaneous CP violation. Furthermore, the four-dimensional CP can be embedded into the duality symmetries, namely modular symmetries for a particular choice of fluxes.

Original languageEnglish
Article number026004
JournalPhysical Review D
Issue number2
Publication statusPublished - Jul 15 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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