Abstract
New versions of the N=2 supergravity hidden sector have been constructed allowing for spontaneous symmetry breaking without a cosmological term and with two arbitrary scales—the partial super-Higgs effect in particular. On this basis, spontaneous symmetry breaking has been investigated in the models of N=2 supergravity with an arbitrary number of vector- and hypermultiplets. As has been shown, the possibility at achieving breaking without a cosmological term is connected with the presence of nilpotent combinations of compact and noncompact generators in an isometry group of a σ model.
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