Seesaw limit of the Nelson-Barr mechanism
We investigate how the solution to the strong CP problem and the explanation for the observed fermion mass hierarchies can be intrinsically related. Specifically, we explore the Nelson-Barr mechanism and identify its “seesaw limit”, where light quark masses are suppressed by large CP-violating terms. Upon adding three (two) vector-like quarks that mix with the down-type (up-type) quark sector of the Standard Model, we demonstrate how the lack of CP violation in the strong sector and the observed quark mass hierarchy can be simultaneously achieved.
Authors
- Julio Leite (ORCID: https://orcid.org/0000-0002-8584-8259)
- Adriano Cherchiglia (ORCID: https://orcid.org/0000-0002-2457-1671)
- C. C. Nishi (ORCID: https://orcid.org/0000-0002-8109-4509)
- Alex G. Dias (ORCID: https://orcid.org/0000-0003-4882-938X)
Institutions
- Universidade Estadual de Campinas (UNICAMP) (BR)
- Parc Científic de la Universitat de València (ES)
- Universidade Federal do ABC (BR)
Publication Details
- Journal
- Physics Letters B
- Published
- 2024-12-27
- DOI
- https://doi.org/10.1016/j.physletb.2024.139222
- Citations
- 1
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 0.66
Funders
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Generalitat Valenciana
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Agencia Estatal de Investigación