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Fivebrane instantons, topological wave functions and hypermultiplet moduli spaces

Daniel Persson (Institutionen för fundamental fysik) ; Boris Pioline ; Sergei Alexandrov
Journal of High Energy Physics (1029-8479). Vol. 1103 (2011), p. 111.
[Artikel, refereegranskad vetenskaplig]

We investigate quantum corrections to the hypermultiplet moduli space M in Calabi-Yau compactifications of type II string theories, with particular emphasis on instanton effects from Euclidean NS5-branes. Based on the consistency of D- and NS5-instanton corrections, we determine the topology of the hypermultiplet moduli space at fixed string coupling, as previewed in arXiv:1009.3026. On the type IIB side, we compute corrections from (p,k)-fivebrane instantons to the metric on M (specifically, the correction to the complex contact structure on its twistor space Z) by applying S-duality to the D-instanton sum. For fixed fivebrane charge k, the corrections can be written as a non-Gaussian theta series, whose summand for k=1 reduces to the topological A-model amplitude. By mirror symmetry, instanton corrections induced from the chiral type IIA NS5-brane are similarly governed by the wave function of the topological B-model. In the course of this investigation we clarify charge quantization for coherent sheaves and find hitherto unnoticed corrections to the Heisenberg, monodromy and S-duality actions on M, as well as to the mirror map for Ramond-Ramond fields and D-brane charges.

Denna post skapades 2012-01-23. Senast ändrad 2012-09-19.
CPL Pubid: 154349


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Institutioner (Chalmers)

Institutionen för fundamental fysik (2005-2015)


Algebra och geometri

Chalmers infrastruktur