Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism
Abstract The $$\textrm{keV}$$ keV scale sterile neutrino was a qualified candidate for dark matter particles in the Dodelson-Widrow mechanism. But the mixing angle, needed to provide enough amount of dark matter, is in contradiction with the astrophysical observations. To alleviate such tension, we...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-12197-0 |
| _version_ | 1797233307695448064 |
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| author | Shu-Yuan Guo Xuewen Liu Bin Zhu |
| author_facet | Shu-Yuan Guo Xuewen Liu Bin Zhu |
| author_sort | Shu-Yuan Guo |
| collection | DOAJ |
| description | Abstract The $$\textrm{keV}$$ keV scale sterile neutrino was a qualified candidate for dark matter particles in the Dodelson-Widrow mechanism. But the mixing angle, needed to provide enough amount of dark matter, is in contradiction with the astrophysical observations. To alleviate such tension, we introduce an effective interaction, i.e. $$g_a (\phi /\Lambda )\partial _{\mu }a \overline{\nu _\alpha }\gamma ^{\mu } \gamma _5 \nu _\alpha $$ g a ( ϕ / Λ ) ∂ μ a ν α ¯ γ μ γ 5 ν α , among Standard Model neutrino $$\nu _\alpha $$ ν α , axion a, and singlet $$\phi $$ ϕ . The axial-vector interaction form is determined by the axion shift symmetry, and the singlet $$\phi $$ ϕ with dynamically varied vacuum expectation value is introduced to reinforce the axial-vector coupling strength and evade the stringent neutrino oscillation constraints. The effective potential generated by the new interaction could cancel the SM counterpart, resulting in an enhanced converting probability between SM neutrino and sterile neutrino. Hence, the production rate of sterile neutrinos can be substantially enlarged with smaller mixing compared to the DW mechanism. |
| first_indexed | 2024-03-11T12:38:27Z |
| format | Article |
| id | doaj.art-31048f281c2446209b8448ea19d6395f |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-24T16:14:06Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-31048f281c2446209b8448ea19d6395f2024-03-31T11:30:33ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-11-0183111610.1140/epjc/s10052-023-12197-0Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanismShu-Yuan Guo0Xuewen Liu1Bin Zhu2Department of Physics, Yantai UniversityDepartment of Physics, Yantai UniversityDepartment of Physics, Yantai UniversityAbstract The $$\textrm{keV}$$ keV scale sterile neutrino was a qualified candidate for dark matter particles in the Dodelson-Widrow mechanism. But the mixing angle, needed to provide enough amount of dark matter, is in contradiction with the astrophysical observations. To alleviate such tension, we introduce an effective interaction, i.e. $$g_a (\phi /\Lambda )\partial _{\mu }a \overline{\nu _\alpha }\gamma ^{\mu } \gamma _5 \nu _\alpha $$ g a ( ϕ / Λ ) ∂ μ a ν α ¯ γ μ γ 5 ν α , among Standard Model neutrino $$\nu _\alpha $$ ν α , axion a, and singlet $$\phi $$ ϕ . The axial-vector interaction form is determined by the axion shift symmetry, and the singlet $$\phi $$ ϕ with dynamically varied vacuum expectation value is introduced to reinforce the axial-vector coupling strength and evade the stringent neutrino oscillation constraints. The effective potential generated by the new interaction could cancel the SM counterpart, resulting in an enhanced converting probability between SM neutrino and sterile neutrino. Hence, the production rate of sterile neutrinos can be substantially enlarged with smaller mixing compared to the DW mechanism.https://doi.org/10.1140/epjc/s10052-023-12197-0 |
| spellingShingle | Shu-Yuan Guo Xuewen Liu Bin Zhu Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism European Physical Journal C: Particles and Fields |
| title | Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism |
| title_full | Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism |
| title_fullStr | Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism |
| title_full_unstemmed | Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism |
| title_short | Axion-assisted resonance oscillation rescues the Dodelson–Widrow mechanism |
| title_sort | axion assisted resonance oscillation rescues the dodelson widrow mechanism |
| url | https://doi.org/10.1140/epjc/s10052-023-12197-0 |
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