On the radion mediation of the supersymmetry breaking in N = 2, D = 5 supergravity orbifolds

Abstract

We discuss the on-shell N = 1 supersymmetric coupling of brane chiral multiplets in the context of N = 2, D = 5 supergravity compactified on S1 / Z2 orbifolds. Assuming a constant superpotential on the hidden brane we study the transmission of the supersymmetry breaking to the visible brane. We find that to lowest order in the five-dimensional Newton's constant k52 and gravitino mass m3 / 22 the spinor field of the radion multiplet is responsible of inducing positive one-loop squared masses mφ2 ∼ m3 / 22 / (MPlanck2 R2) to the scalar fields which are localized on the visible brane with R the length scale of the fifth dimension. Considering a cubic superpotential on the visible brane we also find that non-vanishing soft trilinear scalar couplings A are induced given by A = 3 mφ2 / m3 / 2. © 2008 Elsevier B.V. All rights reserved