Solving the strong CP problem in string-inspired theories with modular invariance

2025/05/26 by Ferruccio Feruglio, Feruglio, Ferruccio, A. Marrone +5 · 2 citations
Computer Science · #Computational Physics and Python Applications #Distributed and Parallel Computing Systems #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)

paper · pdf · doi:10.48550/arxiv.2505.20395

openalex publication_date 2025/05/26 · openalex created_date 2025/10/15 · openalex updated_date 2026/07/28

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.

Citations

• What can solve the Strong CP problem?
• Non-invertible symmetry as an axion-less solution to the strong CP problem
• Anomalies in neutrino oscillations and Physics BSM
• Interplay and Correlations Between Quark and Lepton Observables in Modular Symmetry Models
• Three-zero texture of quark-mass matrices as a solution to the strong CP problem
• Axionless strong CP problem solution: the spontaneous CP violation case
• Strong CP and Flavor in Multi-Higgs Theories
• Spontaneous CP violation in Supersymmetric QCD
• Solving the strong CP problem without axions
• Challenges for the Nelson-Barr Mechanism
• Spontaneous CP violation and the strong CP problem

Cited by

• Exploring the Landscape of Spontaneous CP Violation in Supersymmetric Theories
• Two Higgs Doublet Solutions to the Strong CP Problem

Related

• The Strong CP Problem, String Theory and the Nelson-Barr Mechanism
• Solving the strong CP problem without axions
• Solving the strong CP problem
• CP violation and target-space modular invariance
• CP from strings: ideas and problems