N = 2 Type Iheterotic duality and higher derivative Fterms
Abstract
We test the conjectured Type Iheterotic duality in four dimensions by analyzing a given class of higher derivative Fterms of the form F_{g}W^{2g}, with W the N = 2 gravitational superfield. We study a particular dual pair of theories, theO (2,2) heterotic model and a type I model based on the K3Z_{2} orbifold theory constructed by Gimon and Polchinski, further compactified on a torus. The F_{g} couplings appear at 1loop on both theories; because of the weakweak nature of this duality in four dimensions, it is meaningful to compare the heterotic F_{g}'s with the corresponding type I couplings perturbatively. We compute the F_{g}'s in type I, showing that they receive contributions only from N = 2 BPS states and that in the appropriate limit they coincide with the heterotic couplings, in agreement with the given duality.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(96)016656
 arXiv:
 arXiv:hepth/9611017
 Bibcode:
 1997PhLB..395...42S
 Keywords:

 High Energy Physics  Theory
 EPrint:
 latex file, 11 pages, no figures, minor corrections and M\"obius strip contribution included