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arXiv · 2108.04265

D-instantons in Type IIA string theory on Calabi-Yau threefolds

Sergei Alexandrov·Ashoke Sen·Bogdan Stefański jr
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Abstract

Type IIA string theory compactified on a Calabi-Yau threefold has a hypermultiplet moduli space whose metric is known to receive non-perturbative corrections from Euclidean D2-branes wrapped on 3-cycles. These corrections have been computed earlier by making use of mirror symmetry, S-duality and twistorial description of quaternionic geometries. In this paper we compute the leading corrections in each homology class using a direct world-sheet approach without relying on any duality symmetry or supersymmetry. Our results are in perfect agreement with the earlier predictions.

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Sergei Alexandrov, Ashoke Sen, Bogdan Stefański jr. 2021-08-09. D-instantons in Type IIA string theory on Calabi-Yau threefolds. https://doi.org/10.1007/jhep11(2021)018

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