Freeze-in and Freeze-out in a Right-Handed Neutrino Extended MSSM with a Seesaw Mechanism
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912912508977152 |
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| author | Gupta, Tushar Heikinheimo, Matti Huitu, Katri Waltari, Harri |
| author_facet | Gupta, Tushar Heikinheimo, Matti Huitu, Katri Waltari, Harri |
| contents | We investigate the possibility of saturating the relic density bound with light Higgsinos. When the minimal supersymmetric Standard Model is extended with right-handed neutrino superfields and the seesaw scale is very low, right-handed sneutrinos can be produced via the freeze-in mechanism. In such a case we can have essentially two independent sources for dark matter, the traditional freeze-out of Higgsinos and the freeze-in of right-handed sneutrinos. The heavier of these two will decay to the lighter species with a delay. We rule out such a scenario for all seesaw models as the lifetime of sterile neutrinos produced over-abundantly via Dodelson-Widrow mechanism exceeds the age of the universe and will contribute to the relic density. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18969 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Freeze-in and Freeze-out in a Right-Handed Neutrino Extended MSSM with a Seesaw Mechanism Gupta, Tushar Heikinheimo, Matti Huitu, Katri Waltari, Harri High Energy Physics - Phenomenology We investigate the possibility of saturating the relic density bound with light Higgsinos. When the minimal supersymmetric Standard Model is extended with right-handed neutrino superfields and the seesaw scale is very low, right-handed sneutrinos can be produced via the freeze-in mechanism. In such a case we can have essentially two independent sources for dark matter, the traditional freeze-out of Higgsinos and the freeze-in of right-handed sneutrinos. The heavier of these two will decay to the lighter species with a delay. We rule out such a scenario for all seesaw models as the lifetime of sterile neutrinos produced over-abundantly via Dodelson-Widrow mechanism exceeds the age of the universe and will contribute to the relic density. |
| title | Freeze-in and Freeze-out in a Right-Handed Neutrino Extended MSSM with a Seesaw Mechanism |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.18969 |