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...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324007809 |
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| author | A.L. Cherchiglia A.G. Dias J. Leite C.C. Nishi |
| author_facet | A.L. Cherchiglia A.G. Dias J. Leite C.C. Nishi |
| author_sort | A.L. Cherchiglia |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-d8eade56074145e58dea5a5b89c8329a |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-d8eade56074145e58dea5a5b89c8329a2025-01-10T04:37:45ZengElsevierPhysics Letters B0370-26932025-01-01860139222Seesaw limit of the Nelson-Barr mechanismA.L. Cherchiglia0A.G. Dias1J. Leite2C.C. Nishi3Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas-SP, BrazilCentro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André-SP, BrazilAHEP Group, Institut de Física Corpuscular, CSIC/Universitat de València, Parc Científic de Paterna, C/Catedrático José Beltrán, 2 E-46980 Paterna (Valencia), Spain; Corresponding author.Centro de Matemática, Computação e Cognição, Universidade Federal do ABC, Santo André-SP, BrazilWe 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.http://www.sciencedirect.com/science/article/pii/S0370269324007809 |
| spellingShingle | A.L. Cherchiglia A.G. Dias J. Leite C.C. Nishi Seesaw limit of the Nelson-Barr mechanism Physics Letters B |
| title | Seesaw limit of the Nelson-Barr mechanism |
| title_full | Seesaw limit of the Nelson-Barr mechanism |
| title_fullStr | Seesaw limit of the Nelson-Barr mechanism |
| title_full_unstemmed | Seesaw limit of the Nelson-Barr mechanism |
| title_short | Seesaw limit of the Nelson-Barr mechanism |
| title_sort | seesaw limit of the nelson barr mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324007809 |
| work_keys_str_mv | AT alcherchiglia seesawlimitofthenelsonbarrmechanism AT agdias seesawlimitofthenelsonbarrmechanism AT jleite seesawlimitofthenelsonbarrmechanism AT ccnishi seesawlimitofthenelsonbarrmechanism |