D-instantons in Type IIA string theory on Calabi-Yau threefolds Auteur(s): Alexandrov S., Sen Ashoke, Stefański Bogdan (Article) Publié: Journal Of High Energy Physics, vol. 2021 p.18 (2021) Texte intégral en Openaccess : Ref HAL: hal-03319142_v1 Ref Arxiv: 2108.04265 DOI: 10.1007/JHEP11(2021)018 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote Résumé: 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. |