Flavour non-conservation in goldstino interactions

We point out that the interactions of goldstinos with matter supermultiplet s are a potential source of flavour violation, if fermion and sfermion mass matrices are not aligned and supersymmetry is spontaneously broken at a lo w scale. We study the impact of those couplings on low-energy processes suc h as mu --> e gamma, mu --> eee, K --> mu(+)mu(-), K-(K) over bar transitio ns and analogous ones. Moreover, we address the issue of flavour violation in low-energy processes involving two goldstinos and two matter fermions, g eneralizing earlier results obtained in the flavour-conserving case. (C) 20 00 Elsevier Science B.V. All rights reserved.