F-term SUSY Breaking and Moduli

Understand

We discuss the coupling of heavy moduli fields to light fields when the dynamics of the latter, absent such couplings, yields metastable vacua.

• We show that the survival of the vacuum structure of the local model depends nontrivially on the cross-couplings of the two sectors.
• In particular we find that for "local" models (such as those realized by D-branes in type II string theories) with metastable vacua breaking supersymmetry via F-terms, cross-coupling of the two sectors at an intermediate scale can push the metastable vacuum outside of the regime of the effective field theory.
• We parametrize the region in which the metastable vacua are safe.