Self-dual N=8 supergravity as closed N=2(4) strings.

@article{Siegel1993SelfdualNS,
  title={Self-dual N=8 supergravity as closed N=2(4) strings.},
  author={M Siegel},
  journal={Physical review. D, Particles and fields},
  year={1993},
  volume={47 6},
  pages={2504-2511}
}
  • M Siegel
  • Published 1993 in Physical review. D, Particles and fields
As open N=2 or 4 strings describe self-dual N=4 super Yang-Mills in 2+2 dimensions, the corresponding closed (heterotic) strings describe self-dual un-gauged (gauged) N=8 supergravity. These theories are conveniently formulated in a chiral superspace with general supercoordinate and local OSp(8|2) gauge invariances. The super-light-cone and covariant-component actions are analyzed. Because only half the Lorentz group is gauged, the gravity field equation is just the vanishing of the torsion. 

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) 2574 ; A . Parkes , A cubic action for self - dual Yang - Mills , Zürich preprint ETH - TH / 92 - 14 ( March 1992 ) . [ 11 ] A . D ’ Adda and F . Lizzi

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