paper

Manifest Electromagnetic Duality in Closed Superstring Field Theory

arXiv:hep-th/9607070 · doi:10.1016/S0370-2693(96)01217-8

Abstract

The free action for massless Ramond-Ramond fields is derived from closed superstring field theory using the techniques of Siegel and Zwiebach. For the uncompactified Type IIB superstring, this gives a manifestly Lorentz-covariant action for a self-dual five-form field strength. Upon compactification to four dimensions, the action depends on a U(1) field strength from 4D N=2 supergravity. However, unlike the standard Maxwell action, this action is manifestly invariant under the electromagnetic duality transformation which rotates into .

Added three references and corrected one footnote. 15 pages harvmac

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