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Threshold Corrections in Heterotic String Theory from Conformal Perturbation Theory
Abstract
We use conformal perturbation theory to compute one-loop threshold corrections to the Kähler potential of the heterotic string. For this we consider the theory compactified at the Gepner point of the quintic, that is at a highly stringy point of its moduli space. To obtain the corrections, we compute how the weights of the lightest states of the worldsheet theory shift at second order in conformal perturbation theory. This approach can be used to obtain the one-loop correction to all orders in α'.
Related
BibTeX
@misc{demirtas2026threshold,
title = {{Threshold Corrections in Heterotic String Theory from Conformal Perturbation Theory}},
author = {Dilan Nur Demirtaş and Christoph A. Keller and Manki Kim},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.20459},
eprint = {2608.20459},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.20459},
}
RIS
TY - UNPB
TI - Threshold Corrections in Heterotic String Theory from Conformal Perturbation Theory
AU - Dilan Nur Demirtaş
AU - Christoph A. Keller
AU - Manki Kim
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2608.20459
UR - https://arxiv.org/abs/2608.20459
AB - We use conformal perturbation theory to compute one-loop threshold corrections to the Kähler potential of the heterotic string. For this we consider the theory compactified at the Gepner point of the quintic, that is at a highly stringy point of its moduli space. To obtain the corrections, we compute how the weights of the lightest states of the worldsheet theory shift at second order in conformal perturbation theory. This approach can be used to obtain the one-loop correction to all orders in α'.
ER -