Instantons and seven-branes in type IIB superstring theory

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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PHYZZX macros. 13 pages. Final version as it will appear in Phys. Lett. B (typos corrected)

Scientific paper

10.1016/0370-2693(95)01565-5

Instanton and seven-brane solutions of type IIB supergravity carrying charges in the Ramond-Ramond sector are constructed. The singular seven-brane has a quantized \RR \ \lq magnetic' charge whereas its dual is the instanton, which is non-singular in the string frame and has an associated {\it global} \lq electric' charge. The product of these charges is constrained by a Dirac quantization condition. The instanton has the form of a space-time wormhole in the string frame, and is responsible for the non-conservation of the Noether current.

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