Charged seven-dimensional spacetimes with spherically symmetric extra-dimensions

(eng) We derive exact solutions of the seven-dimensional Einstein-Maxwell equations for a spacetime exhibiting Poincare invariance along four-dimensions and spherical symmetry in the extra-dimensions. Such topology generically arises in the context of braneworld models. Our solutions generalise previous results on Ricci-flat spacetimes admitting the two-sphere and are shown to include wormhole configurations. A regular coordinate system suitable to describe the whole spacetime is singled-out and we discuss the physical relevance of the derived solutions. Comment: 14 pages, 8 figures, uses RevTeX. Physical discussion clarified, wormhole solutions added. References added