Non-BPS branes of supersymmetric brane worlds

We consider five-dimensional brane worlds with N = 2 gauged supergravity in the bulk coupled supersymmetrically to two boundary branes at the fixed points of a Z(2) symmetry. We analyse two mechanisms that break supersymmetry either by choosing flipped fermionic boundary conditions on the boundary branes or by modifying the gravitino variation to include both Z(2)-odd and Z(2)-even operators. In all cases we find the corresponding background. Including an even part in the gravitino variation leads to tilted branes. Choosing the flipped boundary conditions leads to AdS(4) branes and stabilized radion in the detuned case, when the expectation value of the even variation is nonzero. Another solution has the interpretation of moving AdS(4) branes separated by a horizon. The solution with moving branes. separated by a horizon can be extended to the tuned case. In the presence of a horizon, temperature mediation communicates supersymmetry breakdown to the branes. (C) 2001 Published by Elsevier Science B.V.