Heterotic moduli, the double extension and the alpha'^2 metric

Jock McOrist; Qianhe Yin

Heterotic moduli, the double extension and the alpha'^2 metric

High Energy Physics - Theory 2026-07-17 v1 Differential Geometry

Authors: Jock McOrist , Qianhe Yin

Abstract

We compute the heterotic moduli-space metric through $\alpha'^2$ for backgrounds admitting a smooth $\alpha'\to0$ limit. The Kaehler potential is unchanged to this order, but the metric receives corrections from the deformation of the Hull connection which mixes complex structure and hermitian moduli. We discuss this and clarify the roles of the extension bundle, F-terms, the D-terms and the string-derived moduli space metric.

Keywords

heterotic moduli double extension alpha'^2 metric Kaehler potential Hull connection extension bundle F-terms D-terms

Cite

@article{arxiv.2607.15817,
  title  = {Heterotic moduli, the double extension and the alpha'^2 metric},
  author = {Jock McOrist and Qianhe Yin},
  journal= {arXiv preprint arXiv:2607.15817},
  year   = {2026}
}

Comments

33 pages