Instantons and Holomorphic Couplings in Intersecting D-brane Models
Abstract
We clarify certain aspects and discuss extensions of the recently introduced string D-instanton calculus (hep-th/0609191). The one-loop determinants are related to one-loop open string threshold corrections in intersecting D6-brane models. Utilising a non-renormalisation theorem for the holomorphic Wilsonian gauge kinetic functions, we derive a number of constraints for the moduli dependence of the matter field Kaehler potentials of intersecting D6-brane models on the torus. Moreover, we compute string one-loop corrections to the Fayet-Iliopoulos terms on the D6-branes finding that they are proportional to the gauge threshold corrections. Employing these results, we discuss the issue of holomorphy for E2-instanton corrections to the superpotential. Eventually, we discuss E2-instanton corrections to the gauge kinetic functions and the FI-terms.
Cite
@article{arxiv.0705.2366,
title = {Instantons and Holomorphic Couplings in Intersecting D-brane Models},
author = {Nikolas Akerblom and Ralph Blumenhagen and Dieter Lust and Maximilian Schmidt-Sommerfeld},
journal= {arXiv preprint arXiv:0705.2366},
year = {2009}
}