F^4 Terms in N=4 String Vacua
High Energy Physics - Theory
2010-11-19 v2
Abstract
We discuss terms in torroidal compactifications of type-I and heterotic SO(32) string theory. We give a simple argument why only short BPS multiplets contribute to these terms at one loop, and verify heterotic-type-I duality to this order.
Cite
@article{arxiv.hep-th/9611205,
title = {F^4 Terms in N=4 String Vacua},
author = {C. Bachas and E. Kiritsis},
journal= {arXiv preprint arXiv:hep-th/9611205},
year = {2010}
}
Comments
10 pages, Latex. A statement about superinvariants was corrected. Minor cosmetic changes were also made. To appear in Proceedings of Trieste Spring School and Workshop, April 1996