Classification of Flat Directions in Perturbative Heterotic Superstring Vacua with Anomalous U(1)
Abstract
We develop techniques to classify D- and F-flat directions for N=1 supersymmetric string vacua of the perturbative heterotic string theory, which possess an anomalous U(1) gauge group at the tree level. Genus-one corrections generate a Fayet-Iliopoulos term for the D-term of U(1)_A, which is canceled by non-zero vacuum expectation values (VEVs) of certain massless multiplets in such a way that the anomalous U(1) is broken, while maintaining the D- and F-flatness of the effective field theory. A systematic analysis of flat directions is given for non-zero VEVs of non-Abelian singlets, and the techniques are illustrated for a specific model. The approach sets the stage to classify the D- and F-flat directions for a large class of perturbative string vacua. This classification is a prerequisite to address systematically the phenomenological consequences of these models.
Keywords
Cite
@article{arxiv.hep-th/9711178,
title = {Classification of Flat Directions in Perturbative Heterotic Superstring Vacua with Anomalous U(1)},
author = {G. Cleaver and M. Cvetic and J. R. Espinosa and L. Everett and P. Langacker},
journal= {arXiv preprint arXiv:hep-th/9711178},
year = {2009}
}
Comments
26 pages