Small neutrino masses from a decoupled singlet scalar field
We propose a unified solution with Z4 discrete symmetry for small neutrino masses and stability of dark matter. The Standard Model is extended with an inert doublet scalar, a dark singlet scalar, a spurion scalar and right-handed neutrinos, which all transform nontrivially under Z4. After the Z4 sym...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325000036 |
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| author | Jongkuk Kim Seong-Sik Kim Hyun Min Lee Rojalin Padhan |
| author_facet | Jongkuk Kim Seong-Sik Kim Hyun Min Lee Rojalin Padhan |
| author_sort | Jongkuk Kim |
| collection | DOAJ |
| description | We propose a unified solution with Z4 discrete symmetry for small neutrino masses and stability of dark matter. The Standard Model is extended with an inert doublet scalar, a dark singlet scalar, a spurion scalar and right-handed neutrinos, which all transform nontrivially under Z4. After the Z4 symmetry is broken to Z2 by the VEV of the spurion, much below the mass scale of the dark singlet scalar, a small lepton number violating coupling for the inert doublet is generated at tree level, so small neutrino masses are obtained at one-loops for relatively light new fields. We discuss the important roles of the Z4 symmetry for neutrino masses, dark matter physics and thermal leptogenesis. |
| format | Article |
| id | doaj-art-97563539e2f646379ae80345ab3b4dec |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-97563539e2f646379ae80345ab3b4dec2025-02-10T04:33:51ZengElsevierPhysics Letters B0370-26932025-02-01861139243Small neutrino masses from a decoupled singlet scalar fieldJongkuk Kim0Seong-Sik Kim1Hyun Min Lee2Rojalin Padhan3Department of Physics, Chung-Ang University, Seoul 06974, KoreaDepartment of Physics, Chung-Ang University, Seoul 06974, KoreaCorresponding author.; Department of Physics, Chung-Ang University, Seoul 06974, KoreaDepartment of Physics, Chung-Ang University, Seoul 06974, KoreaWe propose a unified solution with Z4 discrete symmetry for small neutrino masses and stability of dark matter. The Standard Model is extended with an inert doublet scalar, a dark singlet scalar, a spurion scalar and right-handed neutrinos, which all transform nontrivially under Z4. After the Z4 symmetry is broken to Z2 by the VEV of the spurion, much below the mass scale of the dark singlet scalar, a small lepton number violating coupling for the inert doublet is generated at tree level, so small neutrino masses are obtained at one-loops for relatively light new fields. We discuss the important roles of the Z4 symmetry for neutrino masses, dark matter physics and thermal leptogenesis.http://www.sciencedirect.com/science/article/pii/S0370269325000036 |
| spellingShingle | Jongkuk Kim Seong-Sik Kim Hyun Min Lee Rojalin Padhan Small neutrino masses from a decoupled singlet scalar field Physics Letters B |
| title | Small neutrino masses from a decoupled singlet scalar field |
| title_full | Small neutrino masses from a decoupled singlet scalar field |
| title_fullStr | Small neutrino masses from a decoupled singlet scalar field |
| title_full_unstemmed | Small neutrino masses from a decoupled singlet scalar field |
| title_short | Small neutrino masses from a decoupled singlet scalar field |
| title_sort | small neutrino masses from a decoupled singlet scalar field |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325000036 |
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