CP Violation and Dilaton Stabilization in Heterotic String Models

Details CP Violation and Dilaton Stabilization in Heterotic String Models CP Violation and Dilaton Stabilization in Heterotic String Models

2001-10-07

arxiv.org/abs/hep-th/0110063v4

Phys.Rev. D65 (2002) 115014

Physics

High Energy Physics

High Energy Physics - Theory

matches the PRD version

Scientific paper

10.1103/PhysRevD.65.115014

We study the possibility of spontaneous CP violation in string models with the dilaton field stabilized at a phenomenologically acceptable value. We consider three mechanisms to stabilize the dilaton: multiple gaugino condensates, a nonperturbative Kahler potential, and a superpotential based on S-duality, and analyze consequent CP phases in the soft SUSY breaking terms. Due to non-universality forced upon the theory by requiring a non-trivial CKM phase, the EDM problem becomes more severe. Even if there are no complex phases in the VEVs of the SUSY breaking fields, the electric dipole moments are overproduced by orders of magnitude. We also address the question of modular invariance of the physical CP phases.

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