Nondecoupling of maximal supergravity from the superstring.

@article{Green2007NondecouplingOM,
  title={Nondecoupling of maximal supergravity from the superstring.},
  author={Michael B. Green and Hirosi Ooguri and John H. Schwarz},
  journal={Physical review letters},
  year={2007},
  volume={99 4},
  pages={
          041601
        }
}
We consider the conditions necessary for obtaining perturbative maximal supergravity in d dimensions as a decoupling limit of type II superstring theory compactified on a (10-d) torus. For dimensions d=2 and d=3, it is possible to define a limit in which the only finite-mass states are the 256 massless states of maximal supergravity. However, in dimensions d>or=4, there are infinite towers of additional massless and finite-mass states. These correspond to Kaluza-Klein charges, wound strings… 
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