Fivebrane Instantons and $R^2$ couplings in $N=4$ String Theory
High Energy Physics - Theory
2016-08-25 v1
Abstract
We compute the gravitational coupling for IIA string theory on and use string-string duality to deduce the corresponding term for heterotic string on . The latter is an infinite sum of gravitational instanton effects which we associate with the effects of Euclidean fivebranes wrapped on . These fivebranes are the neutral fivebranes or zero size instantons of heterotic string theory.
Cite
@article{arxiv.hep-th/9610237,
title = {Fivebrane Instantons and $R^2$ couplings in $N=4$ String Theory},
author = {Jeffrey A. Harvey and Gregory Moore},
journal= {arXiv preprint arXiv:hep-th/9610237},
year = {2016}
}
Comments
16 pages, harvmac, no figures