An Inverse Penrose Limit and Supersymmetry Enhancement in the Presence of Tensor Central Charges

A connection between weak and strong tension limits and their perturbative corrections is discussed. New twistor-like models based on D = 4, N = 1 tensionless superstring and superbrane with tensor central charges are studied. The presence of three, two or less preserved fractions of κ-symmetry in the actions free of the Wess-Zumino terms is shown. A correlation of extra κ-symmetry with the R-symmetry is established. The equations of the superstring and superbrane models preserving 3/4 supersymmetry are exactly solved. The general solution for the Goldstone fermion is pure static, but for the Goldstone bosons it also includes a term describing string/brane motions along the fixed directions given by the initial data. These solutions correspond to the partial spontaneous breaking of the D = 4, N = 1 global supersymmetry and can be associated with a static closed magnetic Nielsen-Olesen vortex or a p-dimensional vortex.