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Gravitational Instantons in Heterotic String Theory: The H-Map and the Moduli Deformations of (4,4) Superconformal Field Theories | | M.Billo’
; P.Fre’
; L.Girardello
; A.Zaffaroni
; | | Date: |
14 Oct 1992 | | Journal: | Int. J. Mod. Phys. A8 (1993) 2351-2418 | | Subject: | hep-th | | Abstract: | We study the problem of string propagation in a general instanton background for the case of the complete heterotic superstring. We define the concept of generalized HyperKahler manifolds and we relate it to (4,4) superconformal theories. We propose a generalized h-map construction that predicts a universal SU(6) symmetry for the modes of the string excitations moving in an instanton background. We also discuss the role of abstract $N$=4 moduli and, applying it to the particular limit case of the solvable SU(2) X R instanton found by Callan et al. we show that it admits deformations and corresponds to a point in a 16-dimensional moduli space. The geometrical characterization of the other spaces in the same moduli-space remains an outstanding problem. | | Source: | arXiv, hep-th/9210076 | | Services: | Forum | Review | PDF | Favorites | |
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