Vector-like quark doublets, weak-basis invariants and CP violation
Abstract We study Standard Model extensions with isodoublet vector-like quarks with standard charges. Their presence induces right-handed charged and neutral currents. We identify minimal sets of independent parameters characterizing these extensions, describe useful weak bases, and provide paramete...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-08-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP08(2025)061 |
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| author | F. Albergaria J. F. Bastos B. Belfatto G. C. Branco J. T. Penedo A. Rodríguez-Sánchez J. I. Silva-Marcos |
| author_facet | F. Albergaria J. F. Bastos B. Belfatto G. C. Branco J. T. Penedo A. Rodríguez-Sánchez J. I. Silva-Marcos |
| author_sort | F. Albergaria |
| collection | DOAJ |
| description | Abstract We study Standard Model extensions with isodoublet vector-like quarks with standard charges. Their presence induces right-handed charged and neutral currents. We identify minimal sets of independent parameters characterizing these extensions, describe useful weak bases, and provide parameterizations for all quark mixing. We analyze the intricacies of CP violation in such scenarios, finding a complete set of CP-odd invariants for the single doublet case. Crucially, we uncover a connection between weak-basis invariants and effective rephasing invariants involving only standard quarks. These results allow us to explore the phenomenology of doublet vector-like quarks through a rephasing-invariant analysis, with an emphasis on CP violation, including the potential role of these fields in explaining the Cabibbo angle anomalies. |
| format | Article |
| id | doaj-art-22b1b4bf183b4863841b467b26af67bb |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-22b1b4bf183b4863841b467b26af67bb2025-08-20T03:42:37ZengSpringerOpenJournal of High Energy Physics1029-84792025-08-0120258111910.1007/JHEP08(2025)061Vector-like quark doublets, weak-basis invariants and CP violationF. Albergaria0J. F. Bastos1B. Belfatto2G. C. Branco3J. T. Penedo4A. Rodríguez-Sánchez5J. I. Silva-Marcos6CFTP, Departamento de Física, Instituto Superior Técnico, Universidade de LisboaCFTP, Departamento de Física, Instituto Superior Técnico, Universidade de LisboaInstitut für Theoretische Teilchenphysik, Karlsruhe Institute of TechnologyCFTP, Departamento de Física, Instituto Superior Técnico, Universidade de LisboaINFN, Sezione di Roma TreInstituto de Física Corpuscular, Universitat de València – CSICCFTP, Departamento de Física, Instituto Superior Técnico, Universidade de LisboaAbstract We study Standard Model extensions with isodoublet vector-like quarks with standard charges. Their presence induces right-handed charged and neutral currents. We identify minimal sets of independent parameters characterizing these extensions, describe useful weak bases, and provide parameterizations for all quark mixing. We analyze the intricacies of CP violation in such scenarios, finding a complete set of CP-odd invariants for the single doublet case. Crucially, we uncover a connection between weak-basis invariants and effective rephasing invariants involving only standard quarks. These results allow us to explore the phenomenology of doublet vector-like quarks through a rephasing-invariant analysis, with an emphasis on CP violation, including the potential role of these fields in explaining the Cabibbo angle anomalies.https://doi.org/10.1007/JHEP08(2025)061CP ViolationVector-Like Fermions |
| spellingShingle | F. Albergaria J. F. Bastos B. Belfatto G. C. Branco J. T. Penedo A. Rodríguez-Sánchez J. I. Silva-Marcos Vector-like quark doublets, weak-basis invariants and CP violation Journal of High Energy Physics CP Violation Vector-Like Fermions |
| title | Vector-like quark doublets, weak-basis invariants and CP violation |
| title_full | Vector-like quark doublets, weak-basis invariants and CP violation |
| title_fullStr | Vector-like quark doublets, weak-basis invariants and CP violation |
| title_full_unstemmed | Vector-like quark doublets, weak-basis invariants and CP violation |
| title_short | Vector-like quark doublets, weak-basis invariants and CP violation |
| title_sort | vector like quark doublets weak basis invariants and cp violation |
| topic | CP Violation Vector-Like Fermions |
| url | https://doi.org/10.1007/JHEP08(2025)061 |
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