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Journal of High Energy Physics

, 2015:176 | Cite as

Hypermultiplet metric and D-instantons

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Regular Article - Theoretical Physics
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Abstract

We use the twistorial construction of D-instantons in Calabi-Yau compactifications of type II string theory to compute an explicit expression for the metric on the hypermultiplet moduli space affected by these non-perturbative corrections. In this way we obtain an exact quaternion-Kähler metric which is a non-trivial deformation of the local c-map. In the four-dimensional case corresponding to the universal hypermultiplet, our metric fits the Tod ansatz and provides an exact solution of the continuous Toda equation. We also analyze the fate of the curvature singularity of the perturbative metric by deriving an S-duality invariant equation which determines the singularity hypersurface after inclusion of the D(-1)-instanton effects.

Keywords

D-branes Superstring Vacua String Duality 
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Copyright information

© The Author(s) 2015

Authors and Affiliations

  1. 1.Laboratoire Charles Coulomb UMR 5221, Université Montpellier 2MontpellierFrance

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