N = 4 topological strings
Abstract
We show how to make a topological string theory starting from an N = 4 superconformal theory. The critical dimension for this theory is ĉ = 2 (c = 6) . It is shown that superstrings (in both the RNS and GS formulations) and critical N = 2 strings are special cases of this topological theory. Applications for this new topological theory include: (1) Proving the vanishing to all orders of all scattering amplitudes for the selfdual N = 2 string with flat background, with the exception of the threepoint function and the closedstring partition function; (2) Showing that the topological partition function of the N = 2 string on the K3 background may be interpreted as computing the superpotential in harmonic superspace generated upon compactification of type II superstrings from 10 to 6 dimensions; and (3) Providing a new prescription for calculating s uperstring amplitudes which appears to be free of totalderivative ambiguities.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1995
 DOI:
 10.1016/05503213(94)00419F
 arXiv:
 arXiv:hepth/9407190
 Bibcode:
 1995NuPhB.433..123B
 Keywords:

 High Energy Physics  Theory
 EPrint:
 71 pages tex (some minor corrections and additional references)