Nonperturbative corrections to 4D string theory effective actions from SL(2,Z) duality and supersymmetry
arXiv:hep-th/0612027 · doi:10.1103/PhysRevLett.98.211602
Abstract
We find the D(-1) and D1-brane instanton contributions to the hypermultiplet moduli space of type IIB string compactifications on Calabi-Yau threefolds. These combine with known perturbative and worldsheet instanton corrections into a single modular invariant function that determines the hypermultiplet low-energy effective acction.
5 pages, 1 figure; v2: minor changes, references added, title changed as requested by PRL