2006/12/31 by Daniel Robles-Llana, Martin Rocek, Frank Saueressig +2 · 1 citation
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1103/physrevlett.98.211602
published as Phys.Rev.Lett.98:211602,2007 · 5 pages, 1 figure; v2: minor changes, references added, title changed as requested by PRL
arxiv created 2007/04/04 · arxiv updated 2009/12/01
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.