Heterotic Supergravity Research Articles

Macroscopic string-like solutions in massive supergravity

In this report we obtain explicit string-like solutions of equations of motion of massive heterotic supergravity recently obtained by Bergshoeff, Roo and Eyras. We also find consistent string source which can be embedded in these backgrounds when space-time dimension is greater than or equal to six.

The anomaly structure of (2,0) heterotic world-sheet supergravity with gauged R-invariance

We present a superfield approach to the theory of (2,0) world-sheet supergravity. The (2,0) structure group is enlarged to Lorentz × U(1) and the anomaly structure of this extended theory is studied. We then modify the theory by adding the Lorentz Chern-Simons term and present a two-dimensional Green-Schwarz mechanism. The resultant theory corresponds to superconformally invariant string theories outside the critical dimension.

Heterotic (2,1) supergravity in two dimensions

We consider a two-dimensional heterotic supergravity theory which exhibits extended N = 2 local supersymmetry among the left-moving degrees of freedom and unextended N = 1 local supersymmetry - together with a U(1) gauge symmetry - among the right-moving ones. We derive the corresponding super-Liouville action - i.e. the effective action for the supergravity degrees of freedom in the superconformal gauge - and the associated scaling properties. We apply these results to the construction of non-critical heterotic N = (2, 1) string models, corresponding to the propagation in kahlerian target spaces, with a time-dependent background.