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

Journal of High Energy Physics

Bogdan Stefański¹  Ashoke Sen²  Sergei Alexandrov³ 

[1] Centre for Mathematical Science, City, University of London, Northampton Square, EC1V 0HB, London, U.K.;Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhusi, 211019, Allahabad, India;Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, F-34095, Montpellier, France;

关键词: D-branes;    Nonperturbative Effects;    Superstrings and Heterotic Strings;   

DOI  :  10.1007/JHEP11(2021)018

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY