S-Track Stabilization of Heterotic de Sitter Vacua

Details S-Track Stabilization of Heterotic de Sitter Vacua S-Track Stabilization of Heterotic de Sitter Vacua

2006-06-26

arxiv.org/abs/hep-th/0606243v2

Phys.Rev.D75:126003,2007

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, 2 figures; final PRD version

Scientific paper

10.1103/PhysRevD.75.126003

We present a new mechanism, the S-Track, to stabilize the volume modulus S in heterotic M-theory flux compactifications along with the orbifold-size T besides complex structure and vector bundle moduli stabilization. The key dynamical ingredient which makes the volume modulus stabilization possible, is M5-instantons arising from M5-branes wrapping the whole Calabi-Yau slice. These are natural in heterotic M-theory where the warping shrinks the Calabi-Yau volume along S^1/Z_2. Combined with H-flux, open M2-instantons and hidden sector gaugino condensation it leads to a superpotential W which stabilizes S similar like a racetrack but without the need for multi gaugino condensation. Moreover, W contains two competing non-perturbative effects which stabilize T. We analyze the potential and superpotentials to show that it leads to heterotic de Sitter vacua with broken supersymmetry through non-vanishing F-terms.

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