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arXiv · 1710.10665

Rigid limit for hypermultiplets and five-dimensional gauge theories

Sergei Alexandrov·Sibasish Banerjee·Pietro Longhi
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Abstract

We study the rigid limit of a class of hypermultiplet moduli spaces appearing in Calabi-Yau compactifications of type IIB string theory, which is induced by a local limit of the Calabi-Yau. We show that the resulting hyperkahler manifold is obtained by performing a hyperkahler quotient of the Swann bundle over the moduli space, along the isometries arising in the limit. Physically, this manifold appears as the target space of the non-linear sigma model obtained by compactification of a five-dimensional gauge theory on a torus. This allows to compute dyonic and stringy instantons of the gauge theory from the known results on D-instantons in string theory. Besides, we formulate a simple condition on the existence of a non-trivial local limit in terms of intersection numbers of the Calabi-Yau, and find an explicit form for the hypermultiplet metric including corrections from all mutually non-local D-instantons, which can be of independent interest.

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Sergei Alexandrov, Sibasish Banerjee, Pietro Longhi. 2017-10-29. Rigid limit for hypermultiplets and five-dimensional gauge theories. https://doi.org/10.1007/jhep01(2018)156

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