Right-handed Dirac and Majorana neutrinos at Belle II
Abstract We assess the ability of the Belle II experiment to probe the Dirac or Majorana nature of a massive right-handed neutrino (RHN) N in the MeV to GeV mass range. We consider the production and decay of RHNs to proceed via new interactions described by the standard model effective field theory...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-04-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP04(2023)013 |
| _version_ | 1827821224223309824 |
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| author | Tao Han Jiajun Liao Hongkai Liu Danny Marfatia |
| author_facet | Tao Han Jiajun Liao Hongkai Liu Danny Marfatia |
| author_sort | Tao Han |
| collection | DOAJ |
| description | Abstract We assess the ability of the Belle II experiment to probe the Dirac or Majorana nature of a massive right-handed neutrino (RHN) N in the MeV to GeV mass range. We consider the production and decay of RHNs to proceed via new interactions described by the standard model effective field theory (SMEFT) extended with right-handed neutrino fields (SMNEFT), and not via mass mixing with active neutrinos. We find that Belle II has the potential to discover N if kinematically accessible. We perform detailed simulations of the angular distributions of lepton pairs from the decay of N produced in two-body and three-body decays of B mesons. We show that for m N above 100 MeV, Belle II can distinguish between Dirac and Majorana neutrinos at more than the 5σ CL for most operators, and the combination of the production and decay operators can be identified from the subsequent decay of the heavy neutrino. Also, the production operators can be identified using three-body B meson decay for any m N if the B → DℓN and B → D * ℓN events can be well separated. |
| first_indexed | 2024-03-12T01:41:30Z |
| format | Article |
| id | doaj.art-736a154e647840069bd3639563a754e2 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-12T01:41:30Z |
| publishDate | 2023-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-736a154e647840069bd3639563a754e22023-09-10T11:03:00ZengSpringerOpenJournal of High Energy Physics1029-84792023-04-012023412810.1007/JHEP04(2023)013Right-handed Dirac and Majorana neutrinos at Belle IITao Han0Jiajun Liao1Hongkai Liu2Danny Marfatia3Department of Physics and Astronomy, University of PittsburghSchool of Physics, Sun Yat-Sen UniversityPhysics department, Technion — Israel Institute of TechnologyDepartment of Physics and Astronomy, University of Hawaii at ManoaAbstract We assess the ability of the Belle II experiment to probe the Dirac or Majorana nature of a massive right-handed neutrino (RHN) N in the MeV to GeV mass range. We consider the production and decay of RHNs to proceed via new interactions described by the standard model effective field theory (SMEFT) extended with right-handed neutrino fields (SMNEFT), and not via mass mixing with active neutrinos. We find that Belle II has the potential to discover N if kinematically accessible. We perform detailed simulations of the angular distributions of lepton pairs from the decay of N produced in two-body and three-body decays of B mesons. We show that for m N above 100 MeV, Belle II can distinguish between Dirac and Majorana neutrinos at more than the 5σ CL for most operators, and the combination of the production and decay operators can be identified from the subsequent decay of the heavy neutrino. Also, the production operators can be identified using three-body B meson decay for any m N if the B → DℓN and B → D * ℓN events can be well separated.https://doi.org/10.1007/JHEP04(2023)013Neutrino InteractionsSterile or Heavy Neutrinos |
| spellingShingle | Tao Han Jiajun Liao Hongkai Liu Danny Marfatia Right-handed Dirac and Majorana neutrinos at Belle II Journal of High Energy Physics Neutrino Interactions Sterile or Heavy Neutrinos |
| title | Right-handed Dirac and Majorana neutrinos at Belle II |
| title_full | Right-handed Dirac and Majorana neutrinos at Belle II |
| title_fullStr | Right-handed Dirac and Majorana neutrinos at Belle II |
| title_full_unstemmed | Right-handed Dirac and Majorana neutrinos at Belle II |
| title_short | Right-handed Dirac and Majorana neutrinos at Belle II |
| title_sort | right handed dirac and majorana neutrinos at belle ii |
| topic | Neutrino Interactions Sterile or Heavy Neutrinos |
| url | https://doi.org/10.1007/JHEP04(2023)013 |
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