Simplest radiative Dirac neutrino mass models
If neutrinos are Dirac particles, their right-handed partners must be present in the theory. Once introduced in the Standard Model (SM), the difference between the baryon number B and the lepton number L can be promoted to a local U(1)B−L symmetry since the corresponding gauge anomalies can be cance...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-06-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321319301221 |
| _version_ | 1818534991460564992 |
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| author | Shaikh Saad |
| author_facet | Shaikh Saad |
| author_sort | Shaikh Saad |
| collection | DOAJ |
| description | If neutrinos are Dirac particles, their right-handed partners must be present in the theory. Once introduced in the Standard Model (SM), the difference between the baryon number B and the lepton number L can be promoted to a local U(1)B−L symmetry since the corresponding gauge anomalies can be canceled by the right-handed neutrinos. Furthermore, the extremely small neutrino mass can be explained naturally if it is originated from the quantum correction. In this work, we propose simplest models of radiative Dirac neutrino mass using only U(1)B−L symmetry, and without introducing additional fermions and without imposing ad hoc symmetries. In this simple framework, we provide minimal models where Dirac neutrino mass appears at the (i) one-loop, (ii) two-loop and (iii) three-loop. By performing systematic analysis, we show that the minimal one-loop model requires three beyond SM scalar multiplets, whereas minimal two-loop and three-loop models require five. The presented two-loop and three-loop Dirac mass models have not appeared in the literature before. |
| first_indexed | 2024-12-11T18:18:52Z |
| format | Article |
| id | doaj.art-6b356bb94c954b348653a6f5b4125dcc |
| institution | Directory Open Access Journal |
| issn | 0550-3213 |
| language | English |
| last_indexed | 2024-12-11T18:18:52Z |
| publishDate | 2019-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-6b356bb94c954b348653a6f5b4125dcc2022-12-22T00:55:19ZengElsevierNuclear Physics B0550-32132019-06-01943Simplest radiative Dirac neutrino mass modelsShaikh Saad0Department of Physics, Oklahoma State University, Stillwater, OK 74078, USAIf neutrinos are Dirac particles, their right-handed partners must be present in the theory. Once introduced in the Standard Model (SM), the difference between the baryon number B and the lepton number L can be promoted to a local U(1)B−L symmetry since the corresponding gauge anomalies can be canceled by the right-handed neutrinos. Furthermore, the extremely small neutrino mass can be explained naturally if it is originated from the quantum correction. In this work, we propose simplest models of radiative Dirac neutrino mass using only U(1)B−L symmetry, and without introducing additional fermions and without imposing ad hoc symmetries. In this simple framework, we provide minimal models where Dirac neutrino mass appears at the (i) one-loop, (ii) two-loop and (iii) three-loop. By performing systematic analysis, we show that the minimal one-loop model requires three beyond SM scalar multiplets, whereas minimal two-loop and three-loop models require five. The presented two-loop and three-loop Dirac mass models have not appeared in the literature before.http://www.sciencedirect.com/science/article/pii/S0550321319301221 |
| spellingShingle | Shaikh Saad Simplest radiative Dirac neutrino mass models Nuclear Physics B |
| title | Simplest radiative Dirac neutrino mass models |
| title_full | Simplest radiative Dirac neutrino mass models |
| title_fullStr | Simplest radiative Dirac neutrino mass models |
| title_full_unstemmed | Simplest radiative Dirac neutrino mass models |
| title_short | Simplest radiative Dirac neutrino mass models |
| title_sort | simplest radiative dirac neutrino mass models |
| url | http://www.sciencedirect.com/science/article/pii/S0550321319301221 |
| work_keys_str_mv | AT shaikhsaad simplestradiativediracneutrinomassmodels |