Anti D3-branes and gaugino condensation

TL;DR

This paper investigates how anti-D3 branes influence flux interactions and moduli stabilization in string theory, revealing constraints that impact de Sitter model building, especially in scenarios with small warping.

Contribution

It provides a detailed flux decomposition and analyzes the impact of (0,3) flux on Kähler moduli stabilization via gaugino condensation, introducing new constraints.

Findings

(0,3) flux affects Kähler moduli stabilization.

Constraints are mild for large warping scenarios.

Potential issues arise in models with small warping.

Abstract

Anti-D3 branes at the bottom of warped throats, commonly used to uplift the cosmological constant in String-Theory de Sitter proposals, source a plaethora of supersymmetry-breaking fluxes, that can interact nontrivially with other ingredients of the flux compactification. In this paper we perform a complex-structure decomposition of these fluxes, and compute the effect of the (0,3) flux component on the stabilization of K\"ahler moduli via D7-branes gaugino condensation. This allows us to obtain a new constraint on the validity of this stabilization mechanism. This effect does not appear hard to satisfy in de Sitter construction proposals that use long warped throats, but may be problematic in proposals where the warping is small.