Solving the strong CP problem in string-inspired theories with modular invariance
High Energy Physics - Phenomenology
2025-08-11 v2 High Energy Physics - Theory
Abstract
We show that solutions to the strong CP problem based on modular invariance can be extended to incorporate features that appear in string compactifications: quarks with mostly positive modular weights and non-trivial gauge kinetic functions. This requires assuming that singularities and zeroes only appear at special points, such as decompactification limits. We discuss the impact of these assumptions on string gauge unification.
Cite
@article{arxiv.2505.20395,
title = {Solving the strong CP problem in string-inspired theories with modular invariance},
author = {Ferruccio Feruglio and Antonio Marrone and Alessandro Strumia and Arsenii Titov},
journal= {arXiv preprint arXiv:2505.20395},
year = {2025}
}
Comments
19 pages, 3 figures. Webinar presentation: https://youtu.be/gJPWXWFYnl4. v2: final version to appear on JHEP