Affleck-Dine leptogenesis scenario for resonant production of sterile neutrino dark matter
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929451925766144 |
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| author | Kasai, Kentaro Kawasaki, Masahiro Murai, Kai |
| author_facet | Kasai, Kentaro Kawasaki, Masahiro Murai, Kai |
| contents | Sterile neutrino is a fascinating candidate for dark matter. In this paper, we examine the Affleck-Dine (AD) leptogenesis scenario generating a large lepton asymmetry, which can induce the resonant production of sterile neutrino dark matter via the Shi-Fuller (SF) mechanism. We also revisit the numerical calculation of the SF mechanism and the constraints from current X-ray and Lyman-$α$ forest observations. We find that the AD leptogenesis scenario can explain the production of sterile neutrino dark matter by incorporating a non-topological soliton with a lepton charge called L-ball. Finally, we discuss an enhancement of second-order gravitational waves at the L-ball decay and investigate the testability of our scenario with future gravitational wave observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_11902 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Affleck-Dine leptogenesis scenario for resonant production of sterile neutrino dark matter Kasai, Kentaro Kawasaki, Masahiro Murai, Kai High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Sterile neutrino is a fascinating candidate for dark matter. In this paper, we examine the Affleck-Dine (AD) leptogenesis scenario generating a large lepton asymmetry, which can induce the resonant production of sterile neutrino dark matter via the Shi-Fuller (SF) mechanism. We also revisit the numerical calculation of the SF mechanism and the constraints from current X-ray and Lyman-$α$ forest observations. We find that the AD leptogenesis scenario can explain the production of sterile neutrino dark matter by incorporating a non-topological soliton with a lepton charge called L-ball. Finally, we discuss an enhancement of second-order gravitational waves at the L-ball decay and investigate the testability of our scenario with future gravitational wave observations. |
| title | Affleck-Dine leptogenesis scenario for resonant production of sterile neutrino dark matter |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2402.11902 |