Correlating 0νββ decays and flavor observables in leptoquark models
Abstract In this paper, we investigate minimal scalar leptoquark models that dynamically generate neutrino Majorana masses at the one-loop level and examine their implications for low-energy processes. We show that these models can produce viable neutrino masses, consistent with neutrino oscillation...
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| Format: | Article |
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SpringerOpen
2025-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2025)147 |
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| author | S. Fajfer L. P. S. Leal O. Sumensari R. Zukanovich Funchal |
| author_facet | S. Fajfer L. P. S. Leal O. Sumensari R. Zukanovich Funchal |
| author_sort | S. Fajfer |
| collection | DOAJ |
| description | Abstract In this paper, we investigate minimal scalar leptoquark models that dynamically generate neutrino Majorana masses at the one-loop level and examine their implications for low-energy processes. We show that these models can produce viable neutrino masses, consistent with neutrino oscillation and cosmological data. By using leptoquark couplings fixed by neutrino data, we predict additional contributions to neutrinoless double-beta decays (0νββ), which are chirality enhanced and compete with the standard contributions from the Majorana masses. Our analysis demonstrates that these effects are sizable for leptoquark masses as large as O 300 TeV $$ \mathcal{O}\left(300\ \textrm{TeV}\right) $$ , potentially increasing or decreasing the 0νββ half-life, and creating an ambiguity between the normal and inverted mass ordering scenarios. Furthermore, we explore the correlation between 0νββ and flavor observables, such as kaon decays and μ → e conversion in nuclei, emphasizing that the latter is complementary to 0νββ decays. |
| format | Article |
| id | doaj-art-0b31b59f67604217978d82c9a54ddc43 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-0b31b59f67604217978d82c9a54ddc432025-02-09T12:08:14ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025113110.1007/JHEP01(2025)147Correlating 0νββ decays and flavor observables in leptoquark modelsS. Fajfer0L. P. S. Leal1O. Sumensari2R. Zukanovich Funchal3Jožef Stefan InstituteUniversité Paris-Saclay, CNRS/IN2P3, IJCLabUniversité Paris-Saclay, CNRS/IN2P3, IJCLabDepartamento de Física Matemática, Instituto de Física, Universidade de São PauloAbstract In this paper, we investigate minimal scalar leptoquark models that dynamically generate neutrino Majorana masses at the one-loop level and examine their implications for low-energy processes. We show that these models can produce viable neutrino masses, consistent with neutrino oscillation and cosmological data. By using leptoquark couplings fixed by neutrino data, we predict additional contributions to neutrinoless double-beta decays (0νββ), which are chirality enhanced and compete with the standard contributions from the Majorana masses. Our analysis demonstrates that these effects are sizable for leptoquark masses as large as O 300 TeV $$ \mathcal{O}\left(300\ \textrm{TeV}\right) $$ , potentially increasing or decreasing the 0νββ half-life, and creating an ambiguity between the normal and inverted mass ordering scenarios. Furthermore, we explore the correlation between 0νββ and flavor observables, such as kaon decays and μ → e conversion in nuclei, emphasizing that the latter is complementary to 0νββ decays.https://doi.org/10.1007/JHEP01(2025)147Baryon/Lepton Number ViolationNeutrino Interactions |
| spellingShingle | S. Fajfer L. P. S. Leal O. Sumensari R. Zukanovich Funchal Correlating 0νββ decays and flavor observables in leptoquark models Journal of High Energy Physics Baryon/Lepton Number Violation Neutrino Interactions |
| title | Correlating 0νββ decays and flavor observables in leptoquark models |
| title_full | Correlating 0νββ decays and flavor observables in leptoquark models |
| title_fullStr | Correlating 0νββ decays and flavor observables in leptoquark models |
| title_full_unstemmed | Correlating 0νββ decays and flavor observables in leptoquark models |
| title_short | Correlating 0νββ decays and flavor observables in leptoquark models |
| title_sort | correlating 0νββ decays and flavor observables in leptoquark models |
| topic | Baryon/Lepton Number Violation Neutrino Interactions |
| url | https://doi.org/10.1007/JHEP01(2025)147 |
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