D-instantons and twistors: some exact results
High Energy Physics - Theory
2013-05-13 v3
Abstract
We present some results on instanton corrections to the hypermultiplet moduli space in Calabi-Yau compactifications of Type II string theories. Previously, using twistor methods, only a class of D-instantons (D2-instantons wrapping A-cycles) was incorporated exactly and the rest was treated only linearly. We go beyond the linear approximation and give a set of holomorphic functions which, through a known procedure, capture the effect of D-instantons at all orders. Moreover, we show that for a sector where all instanton charges have vanishing symplectic invariant scalar product, the hypermultiplet metric can be computed explicitly.
Cite
@article{arxiv.0902.2761,
title = {D-instantons and twistors: some exact results},
author = {Sergei Alexandrov},
journal= {arXiv preprint arXiv:0902.2761},
year = {2013}
}
Comments
32 pages, 3 figures, uses JHEP3.cls; some changes in section 3.3.3; corrected formula for the contact potential