Heterotic / type I duality and D-brane instantons
Abstract
We study heterotic/type I duality in d=8,9 uncompactified dimensions. We consider the special (``BPS saturated'') F^4 and R^4 terms in the effective one-loop heterotic action, which are expected to be non-perturbatively exact. Under the standard duality map these translate to tree-level, perturbative and non-perturbative contributions on the type I side. We check agreement with the one-loop open string calculation, and discuss the higher-order perturbative contributions, which arise because of the mild non-holomorphicities of the heterotic elliptic genus. We put the heterotic world-sheet instanton corrections in a form that can be motivated as arising from a D-brane instanton calculation on the type-I side.
Cite
@article{arxiv.hep-th/9707126,
title = {Heterotic / type I duality and D-brane instantons},
author = {C. Bachas and C. Fabre and E. Kiritsis and N. A. Obers and P. Vanhove},
journal= {arXiv preprint arXiv:hep-th/9707126},
year = {2011}
}
Comments
latex 23 pages, 3 figures eps included. Final version to appear in Nuclear Physics B