Curved extended superspace from Yang-Mills theory via strings.

Abstract

The massless superfield content of four-dimensional compactifications of closed superstrings with extended ($N=2, 3,or 4$) supersymmetry is derived by multiplying two ($N=0, 1, or 2$) Yang-Mills multiplets. In some cases these superfields are known, and the low-energy actions are determined from the fact that the compensator (dilaton) supermultiplets occur quadratically classically. In the other cases these superfields suggest new formulations of extended superspace theories.