On Flux Compactification and Moduli Stabilization

TL;DR

This paper explores how adding charged matter fields to flux compactifications in type IIB string theory can lead to stable minima with positive or zero cosmological constants without relying on non-perturbative effects.

Contribution

It demonstrates that charged matter fields modify the Kahler potential, superpotential, and D-terms, enabling moduli stabilization with positive or zero cosmological constants.

Findings

Charged matter fields induce new terms in the effective action.

Stable minima with positive or zero cosmological constant are achievable.

Results hold both with and without dilaton decoupling.

Abstract

We study the effect of adding charged matter fields to both D3 and D7 branes in type IIB string theory compactification with fluxes. Generically, charged matter fields induce additional terms to the Kahler form, the superpotential and the D-terms. These terms allow for minima with positive or zero cosmological constants, even in the absence of non-perturbative effects. We show this result first by decoupling the dilaton field along the lines of the KKLT, and second by reincorporating it in the action with the Kahler moduli.