Work

Axionless strong C P problem solution: The spontaneous C P -violation case

Year: 2025

Type: article

Abstract: We propose an alternative to the axion mechanism for addressing the charge parity ( C P ) problem in QCD. Our approach involves imposing C P as an inherent symmetry of the Lagrangian, which is then spontaneously broken. To generate the correct texture for the Yukawa matrices, we introduce a discrete Z 2 symmetry that is softly broken by the scalar potential. By identifying a benchmark point for the Yukawa couplings that aligns with the measured quark masses, the Cabibbo-Kobayashi-Maskawa matrix, and low-energy flavor-changing constraints, our findings suggest that this model offers a viable solution to the C P problem.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.073009

Authors: Rodolfo Ferro-Hernández, Stefano Morisi, Eduardo Peinado

Institutions: Johannes Gutenberg University Mainz, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, University of Naples Federico II, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Universidad Nacional Autónoma de México

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Fundación Marcos Moshinsky, Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México

Award: G317247370