Modular invariance and the QCD angle
High Energy Physics - Phenomenology
2023-07-26 v2 High Energy Physics - Theory
Abstract
String compactifications on an orbi-folded torus with complex structure give rise to chiral fermions, spontaneously broken CP, modular invariance. We show that this allows simple effective theories of flavour and CP where: i) the QCD angle vanishes; ii) the CKM phase is large; iii) quark and lepton masses and mixings can be reproduced up to order one coefficients. We implement such general paradigm in supersymmetry or supergravity, with modular forms or functions, with or without heavy colored states.
Cite
@article{arxiv.2305.08908,
title = {Modular invariance and the QCD angle},
author = {Ferruccio Feruglio and Alessandro Strumia and Arsenii Titov},
journal= {arXiv preprint arXiv:2305.08908},
year = {2023}
}
Comments
32 pages, 2 figures, webinar presentation at https://www.youtube.com/watch?v=s0Vs5ykY36Y. Final version to appear on JHEP with extended discussion on the solution in supergravity