On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos
Abstract If any heavy neutral leptons are discovered in accelerator-based experiments, key questions will involve their possible connection to neutrino masses or leptogenesis. Working in a renormalisable extension of the Standard Model by three right-handed neutrinos, we address the question of how...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-03-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP03(2025)176 |
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| author | Marco Drewes Yannis Georis Juraj Klarić Antony Wendels |
| author_facet | Marco Drewes Yannis Georis Juraj Klarić Antony Wendels |
| author_sort | Marco Drewes |
| collection | DOAJ |
| description | Abstract If any heavy neutral leptons are discovered in accelerator-based experiments, key questions will involve their possible connection to neutrino masses or leptogenesis. Working in a renormalisable extension of the Standard Model by three right-handed neutrinos, we address the question of how much information about the fundamental model parameters can be obtained by measuring the branching ratios in the decays of the heavy neutral leptons into individual SM generations. We find that, provided that these branching ratios could be measured with arbitrary precision and assuming kinematically distinguishable right-handed neutrinos, they can be sufficient to pin down all 18 parameters of the model when supplemented with light neutrino oscillation data. When considering a finite statistical uncertainty comparable to that which can be achieved by future lepton colliders like FCC-ee or CEPC in the mass range of tens of GeV, some parameter degeneracies remain, but measurements would still provide powerful consistency checks of the model. In the sub-GeV range a good sensitivity to individual model parameters can be expected for SHiP and potentially for DUNE. This shows the potential of these experiments to not only discover heavy neutral leptons, but play an important role in understanding their role in particle physics and cosmology. |
| format | Article |
| id | doaj-art-dc77cc6a5dfd4c42a489bbe62454fd5b |
| institution | DOAJ |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-dc77cc6a5dfd4c42a489bbe62454fd5b2025-08-20T03:10:09ZengSpringerOpenJournal of High Energy Physics1029-84792025-03-012025313210.1007/JHEP03(2025)176On the collider-testability of the type-I seesaw model with 3 right-handed neutrinosMarco Drewes0Yannis Georis1Juraj Klarić2Antony Wendels3Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de LouvainCentre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de LouvainCentre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de LouvainEcole Normale Supérieure Paris-SaclayAbstract If any heavy neutral leptons are discovered in accelerator-based experiments, key questions will involve their possible connection to neutrino masses or leptogenesis. Working in a renormalisable extension of the Standard Model by three right-handed neutrinos, we address the question of how much information about the fundamental model parameters can be obtained by measuring the branching ratios in the decays of the heavy neutral leptons into individual SM generations. We find that, provided that these branching ratios could be measured with arbitrary precision and assuming kinematically distinguishable right-handed neutrinos, they can be sufficient to pin down all 18 parameters of the model when supplemented with light neutrino oscillation data. When considering a finite statistical uncertainty comparable to that which can be achieved by future lepton colliders like FCC-ee or CEPC in the mass range of tens of GeV, some parameter degeneracies remain, but measurements would still provide powerful consistency checks of the model. In the sub-GeV range a good sensitivity to individual model parameters can be expected for SHiP and potentially for DUNE. This shows the potential of these experiments to not only discover heavy neutral leptons, but play an important role in understanding their role in particle physics and cosmology.https://doi.org/10.1007/JHEP03(2025)176Neutrino MixingSpecific BSM PhenomenologySterile or Heavy Neutrinos |
| spellingShingle | Marco Drewes Yannis Georis Juraj Klarić Antony Wendels On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos Journal of High Energy Physics Neutrino Mixing Specific BSM Phenomenology Sterile or Heavy Neutrinos |
| title | On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos |
| title_full | On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos |
| title_fullStr | On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos |
| title_full_unstemmed | On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos |
| title_short | On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos |
| title_sort | on the collider testability of the type i seesaw model with 3 right handed neutrinos |
| topic | Neutrino Mixing Specific BSM Phenomenology Sterile or Heavy Neutrinos |
| url | https://doi.org/10.1007/JHEP03(2025)176 |
| work_keys_str_mv | AT marcodrewes onthecollidertestabilityofthetypeiseesawmodelwith3righthandedneutrinos AT yannisgeoris onthecollidertestabilityofthetypeiseesawmodelwith3righthandedneutrinos AT jurajklaric onthecollidertestabilityofthetypeiseesawmodelwith3righthandedneutrinos AT antonywendels onthecollidertestabilityofthetypeiseesawmodelwith3righthandedneutrinos |