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Models with anomalous U(1) gauge symmetry contain various superfields whichcan have nonzero supersymmetry breaking auxiliary components providing theorigin of soft terms in the visible sector, e.g. the U(1) vector superfield,the modulus or dilaton superfield implementing the Green-Schwarz anomalycancellation mechanism, U(1)-charged but standard model singlet mattersuperfield required to cancel the Fayet-Iliopoulos term, and finally thesupergravity multiplet. We examine the relative strength between thesesupersymmetry breaking components in a simple class of models, and find thatvarious different mixed mediations of supersymmetry breaking, involving themodulus, gauge, anomaly and D-term mediations, can be realized depending uponthe characteristics of D-flat directions and how those D-flat directions arestabilized with a vanishing cosmological constant. We identify two parameterswhich represent such properties and thus characterize how the variousmediations are mixed. We also discuss the moduli stabilization and soft termsin a variant of KKLT scenario, in which the visible sector K\"ahler modulus isstabilized by the D-term potential of anomalous U(1) gauge symmetry.

Mixed Mediation of Supersymmetry Breaking with Anomalous U(1) Gauge Symmetry