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arXiv · hep-ph/0112260

The String CP Problem

S. Abel·S. Khalil·O. Lebedev
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Abstract

We show that string models with low energy supersymmetry which accommodate the fermion mass hierarchy generally give non-universal soft trilinear couplings (A-terms). In conjunction with the apparently large Cabibbo-Kobayashi-Maskawa (CKM) phase, this results in large fermion EDMs even in the absence of CP violating phases in the supersymmetry breaking terms and the mu-term. Nonobservation of the EDMs therefore implies that strings select special flavor and/or supersymmetry breaking patterns.

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S. Abel, S. Khalil, O. Lebedev. 2002-08-02. The String CP Problem. https://doi.org/10.1103/physrevlett.89.121601

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