Superspace Effective Actions for 4D Compactifications of Heterotic and Type II Superstrings

  title={Superspace Effective Actions for 4D Compactifications of Heterotic and Type II Superstrings},
  author={Nathan Berkovits},
Two-dimensional sigma models are defined for the new manifestly spacetime supersymmetric description of four-dimensional compactified superstrings. The resulting target-superspace effective action is constrained by the way the spacetime dilaton couples to the worldsheet curvature: For the heterotic superstring, the worldsheet curvature couples to the real part of a chiral multiplet, and for Type II it couples to the real part of the sum of a vector multiplet and a tensor hypermultiplet. For the… CONTINUE READING
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