Discriminating Majorana and Dirac heavy neutrinos at lepton colliders
Abstract In this paper we investigate how well the nature of heavy neutral leptons can be determined at a future lepton collider, after its potential discovery. Considered in a simplified model are prompt decays of the neutrino in the mass range from 100 GeV to 10 TeV. We study event selection and a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-03-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP03(2024)075 |
| _version_ | 1797259570850037760 |
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| author | Krzysztof Mękała Jürgen Reuter Aleksander Filip Żarnecki |
| author_facet | Krzysztof Mękała Jürgen Reuter Aleksander Filip Żarnecki |
| author_sort | Krzysztof Mękała |
| collection | DOAJ |
| description | Abstract In this paper we investigate how well the nature of heavy neutral leptons can be determined at a future lepton collider, after its potential discovery. Considered in a simplified model are prompt decays of the neutrino in the mass range from 100 GeV to 10 TeV. We study event selection and application of multivariate analyses to determine whether such a newly discovered particle is of the Dirac or Majorana nature. Combining lepton charge and kinematic event variables, we find that the nature of a heavy neutrino, whether it is a Dirac or a Majorana particle, can be determined at 95% C.L. almost in the whole discovery range. We will briefly speculate about other than the studied channels and the robustness of this statement in more general models of heavy neutral leptons, particularly on the complementarity of high-energy electron-positron vs. muon colliders on resolving the flavor structure of heavy neutrinos. |
| first_indexed | 2024-04-24T23:11:32Z |
| format | Article |
| id | doaj.art-69a7d7f4a4304c2c9f2f2733c0064754 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-24T23:11:32Z |
| publishDate | 2024-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-69a7d7f4a4304c2c9f2f2733c00647542024-03-17T12:12:09ZengSpringerOpenJournal of High Energy Physics1029-84792024-03-012024311410.1007/JHEP03(2024)075Discriminating Majorana and Dirac heavy neutrinos at lepton collidersKrzysztof Mękała0Jürgen Reuter1Aleksander Filip Żarnecki2Faculty of Physics, University of WarsawDeutsches Elektronen-Synchrotron DESYFaculty of Physics, University of WarsawAbstract In this paper we investigate how well the nature of heavy neutral leptons can be determined at a future lepton collider, after its potential discovery. Considered in a simplified model are prompt decays of the neutrino in the mass range from 100 GeV to 10 TeV. We study event selection and application of multivariate analyses to determine whether such a newly discovered particle is of the Dirac or Majorana nature. Combining lepton charge and kinematic event variables, we find that the nature of a heavy neutrino, whether it is a Dirac or a Majorana particle, can be determined at 95% C.L. almost in the whole discovery range. We will briefly speculate about other than the studied channels and the robustness of this statement in more general models of heavy neutral leptons, particularly on the complementarity of high-energy electron-positron vs. muon colliders on resolving the flavor structure of heavy neutrinos.https://doi.org/10.1007/JHEP03(2024)075Specific BSM PhenomenologyLeft-Right ModelsBaryon/Lepton Number Violation |
| spellingShingle | Krzysztof Mękała Jürgen Reuter Aleksander Filip Żarnecki Discriminating Majorana and Dirac heavy neutrinos at lepton colliders Journal of High Energy Physics Specific BSM Phenomenology Left-Right Models Baryon/Lepton Number Violation |
| title | Discriminating Majorana and Dirac heavy neutrinos at lepton colliders |
| title_full | Discriminating Majorana and Dirac heavy neutrinos at lepton colliders |
| title_fullStr | Discriminating Majorana and Dirac heavy neutrinos at lepton colliders |
| title_full_unstemmed | Discriminating Majorana and Dirac heavy neutrinos at lepton colliders |
| title_short | Discriminating Majorana and Dirac heavy neutrinos at lepton colliders |
| title_sort | discriminating majorana and dirac heavy neutrinos at lepton colliders |
| topic | Specific BSM Phenomenology Left-Right Models Baryon/Lepton Number Violation |
| url | https://doi.org/10.1007/JHEP03(2024)075 |
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