de Rham, ClaudiaDvali, GiaHofmann, StefanKhoury, JustinPujolas, OriolRedi, MicheleTolley, Andrew J.2010-11-302010-11-302010-11-30200810.1103/PhysRevLett.100.251603https://infoscience.epfl.ch/handle/20.500.14299/61237WOS:000257230500013We present a generalization of the Dvali-Gabadadze-Porrati scenario to higher codimensions which, unlike previous attempts, is free of ghost instabilities. The 4D propagator is made regular by embedding our visible 3-brane within a 4-brane, each with their own induced gravity terms, in a flat 6D bulk. The model is ghost-free if the tension on the 3-brane is larger than a certain critical value, while the induced metric remains flat. The gravitational force law "cascades" from a 6D behavior at the largest distances followed by a 5D and finally a 4D regime at the shortest scales.text::journal::journal article::research article