Loop-induced masses for the first two generations with optimum flavour violation
Abstract A mechanism for the masses of third, second, and first generation charged fermions at the tree, 1-loop, and 2-loop levels, respectively, is proposed. The fermionic self-energy corrections that lead to this arrangement are induced through heavy vector bosons of a new gauged flavour symmetry...
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2024-12-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP12(2024)158 |
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| author | Gurucharan Mohanta Ketan M. Patel |
| author_facet | Gurucharan Mohanta Ketan M. Patel |
| author_sort | Gurucharan Mohanta |
| collection | DOAJ |
| description | Abstract A mechanism for the masses of third, second, and first generation charged fermions at the tree, 1-loop, and 2-loop levels, respectively, is proposed. The fermionic self-energy corrections that lead to this arrangement are induced through heavy vector bosons of a new gauged flavour symmetry group G F . It is shown that a single Abelian group suffices as G F . Moreover, the gauge charges are optimized to result in relatively smaller flavour violations in processes involving the first and second generation fermions. The scheme is explicitly implemented on the Standard Model fermions in an anomaly-free manner and is shown to be viable with observed charged fermion masses and quark mixings. Constraints from flavour violations dictate the lower limit on the new physics scale in these types of frameworks. Through optimal flavour violation, it is shown that nearly two orders of magnitude improvement can be achieved on the lower limit, leading to the new physics scale ≥ 103 TeV in this case. Further improvements are possible at the cost of the down quark mass deviating more than 3σ from its value extracted from lattice calculations. Options for inducing tiny masses for light neutrinos are also discussed. |
| format | Article |
| id | doaj-art-efa2a9538391492890742a56f520deea |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-efa2a9538391492890742a56f520deea2025-01-05T12:06:40ZengSpringerOpenJournal of High Energy Physics1029-84792024-12-0120241213610.1007/JHEP12(2024)158Loop-induced masses for the first two generations with optimum flavour violationGurucharan Mohanta0Ketan M. Patel1Theoretical Physics Division, Physical Research LaboratoryTheoretical Physics Division, Physical Research LaboratoryAbstract A mechanism for the masses of third, second, and first generation charged fermions at the tree, 1-loop, and 2-loop levels, respectively, is proposed. The fermionic self-energy corrections that lead to this arrangement are induced through heavy vector bosons of a new gauged flavour symmetry group G F . It is shown that a single Abelian group suffices as G F . Moreover, the gauge charges are optimized to result in relatively smaller flavour violations in processes involving the first and second generation fermions. The scheme is explicitly implemented on the Standard Model fermions in an anomaly-free manner and is shown to be viable with observed charged fermion masses and quark mixings. Constraints from flavour violations dictate the lower limit on the new physics scale in these types of frameworks. Through optimal flavour violation, it is shown that nearly two orders of magnitude improvement can be achieved on the lower limit, leading to the new physics scale ≥ 103 TeV in this case. Further improvements are possible at the cost of the down quark mass deviating more than 3σ from its value extracted from lattice calculations. Options for inducing tiny masses for light neutrinos are also discussed.https://doi.org/10.1007/JHEP12(2024)158New Gauge InteractionsTheories of FlavourVector-Like Fermions |
| spellingShingle | Gurucharan Mohanta Ketan M. Patel Loop-induced masses for the first two generations with optimum flavour violation Journal of High Energy Physics New Gauge Interactions Theories of Flavour Vector-Like Fermions |
| title | Loop-induced masses for the first two generations with optimum flavour violation |
| title_full | Loop-induced masses for the first two generations with optimum flavour violation |
| title_fullStr | Loop-induced masses for the first two generations with optimum flavour violation |
| title_full_unstemmed | Loop-induced masses for the first two generations with optimum flavour violation |
| title_short | Loop-induced masses for the first two generations with optimum flavour violation |
| title_sort | loop induced masses for the first two generations with optimum flavour violation |
| topic | New Gauge Interactions Theories of Flavour Vector-Like Fermions |
| url | https://doi.org/10.1007/JHEP12(2024)158 |
| work_keys_str_mv | AT gurucharanmohanta loopinducedmassesforthefirsttwogenerationswithoptimumflavourviolation AT ketanmpatel loopinducedmassesforthefirsttwogenerationswithoptimumflavourviolation |