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We examine the phenomenological consequences of a supersymmetric bulk in thescenario of large extra dimensions. We assume supersymmetry is realized in thebulk and study the interactions of the resulting bulk gravitino Kaluza-Klein(KK) tower of states, with supersymmetry breaking on the brane inducing a lightmass for the zero-mode gravitino. We derive the 4-d effective theory, includingthe couplings of the bulk gravitino KK states to fermions and their scalarsuperpartners. The virtual exchange of the gravitino KK states in selectronpair production in polarized \epem collisions is then examined. We find thatthe leading order operator for this exchange is dimension six, in contrast tothat of bulk graviton KK exchange which induces a dimension eight operator atlowest order. The resulting kinematic distributions for selectron productionare dramatically altered from those in D=4 supersymmetric scenarios, and canlead to a enormous sensitivity to the fundamental higher dimensional Planckscale, of order $20-25\times \sqrt s$.Comment: 48 pg

Supersymmetric extra dimensions: Gravitino effects in selectron pair production