Abstract
We consider the dimensional reduction to D = 3 of four maximal-rank super-gravities which preserve minimal supersymmetry in D = 11, 7, 5 and 4. Such “curious” theories were investigated some time ago, and the four-dimensional one corresponds to an \( \mathcal{N}=1 \) supergravity with 7 chiral multiplets spanning the seven-disk manifold. Recently, this latter theory provided cosmological models for α-attractors, which are based on the disk geometry with possible restrictions on the parameter α. A unified picture emerges in D = 3, where the Ehlers group of General Relativity merges with the S-, T- and U-dualities of the D = 4 parent theories.
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Duff, M.J., Ferrara, S. & Marrani, A. D = 3 unification of curious supergravities. J. High Energ. Phys. 2017, 23 (2017). https://doi.org/10.1007/JHEP01(2017)023
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DOI: https://doi.org/10.1007/JHEP01(2017)023