Note on mediation of supersymmetry breaking from closed to open strings

We discuss the mediation of supersymmetry breaking from closed to open strings, extending and improving previous analysis of the authors in [I. Antoniadis, T.R. Taylor, Nucl. Phys. B 695 (2004) 103, hep-th/0403293]. In the general case, we find the absence of anomaly mediation around any perturbative string vacuum. When supersymmetry is broken by Scherk-Schwarz boundary conditions along a compactification interval perpendicular to a stack of D-branes, the gaugino acquires a mass at two loops that behaves as m1/2∼g4m3/23 in string units, where m3/2 is the gravitino mass and g is the gauge coupling.