Scalar Co-SIMP dark matter: models and sensitivities
Abstract In this work, we present UV completions of the recently proposed number-changing Co-SIMP freeze-out mechanism. In contrast to the standard cannibalistic-type dark matter picture that occurs entirely in the dark sector, the 3 → 2 process setting the relic abundance in this case requires one...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP08(2023)091 |
| _version_ | 1797647514159022080 |
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| author | Aditya Parikh Juri Smirnov W. Linda Xu Bei Zhou |
| author_facet | Aditya Parikh Juri Smirnov W. Linda Xu Bei Zhou |
| author_sort | Aditya Parikh |
| collection | DOAJ |
| description | Abstract In this work, we present UV completions of the recently proposed number-changing Co-SIMP freeze-out mechanism. In contrast to the standard cannibalistic-type dark matter picture that occurs entirely in the dark sector, the 3 → 2 process setting the relic abundance in this case requires one Standard Model particle in the initial and final states. This prevents the dark sector from overheating and leads to rich experimental signatures. We generate the Co-SIMP interaction with a dark sector consisting of two scalars, with the mediator coupling to either nucleons or electrons. In either case, the dark matter candidate is naturally light : nucleophilic interactions favor the sub-GeV mass range and leptophilic interactions favor the sub-MeV mass range. Viable thermal models in these lighter mass regimes are particularly intriguing to study at this time, as new developments in low-threshold detector technologies will begin probing this region of parameter space. While particles in the sub-MeV regime can potentially impact light element formation and CMB decoupling, we show that a late-time phase transition opens up large fractions of parameter space. These thermal light dark matter models can instead be tested with dedicated experiments. We discuss the viable parameter space in each scenario in light of the current sensitivity of various experimental probes and projected future reach. |
| first_indexed | 2024-03-11T15:17:16Z |
| format | Article |
| id | doaj.art-de7403d60fcb468696c2e0b7a06ffd60 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T15:17:16Z |
| publishDate | 2023-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-de7403d60fcb468696c2e0b7a06ffd602023-10-29T12:10:42ZengSpringerOpenJournal of High Energy Physics1029-84792023-08-012023813610.1007/JHEP08(2023)091Scalar Co-SIMP dark matter: models and sensitivitiesAditya Parikh0Juri Smirnov1W. Linda Xu2Bei Zhou3Department of Physics, Harvard UniversityDepartment of Mathematical Sciences, University of LiverpoolDepartment of Physics, Harvard UniversityWilliam H. Miller III Department of Physics and Astronomy, Johns Hopkins UniversityAbstract In this work, we present UV completions of the recently proposed number-changing Co-SIMP freeze-out mechanism. In contrast to the standard cannibalistic-type dark matter picture that occurs entirely in the dark sector, the 3 → 2 process setting the relic abundance in this case requires one Standard Model particle in the initial and final states. This prevents the dark sector from overheating and leads to rich experimental signatures. We generate the Co-SIMP interaction with a dark sector consisting of two scalars, with the mediator coupling to either nucleons or electrons. In either case, the dark matter candidate is naturally light : nucleophilic interactions favor the sub-GeV mass range and leptophilic interactions favor the sub-MeV mass range. Viable thermal models in these lighter mass regimes are particularly intriguing to study at this time, as new developments in low-threshold detector technologies will begin probing this region of parameter space. While particles in the sub-MeV regime can potentially impact light element formation and CMB decoupling, we show that a late-time phase transition opens up large fractions of parameter space. These thermal light dark matter models can instead be tested with dedicated experiments. We discuss the viable parameter space in each scenario in light of the current sensitivity of various experimental probes and projected future reach.https://doi.org/10.1007/JHEP08(2023)091Cosmology of Theories BSMEarly Universe Particle PhysicsModels for Dark MatterParticle Nature of Dark Matter |
| spellingShingle | Aditya Parikh Juri Smirnov W. Linda Xu Bei Zhou Scalar Co-SIMP dark matter: models and sensitivities Journal of High Energy Physics Cosmology of Theories BSM Early Universe Particle Physics Models for Dark Matter Particle Nature of Dark Matter |
| title | Scalar Co-SIMP dark matter: models and sensitivities |
| title_full | Scalar Co-SIMP dark matter: models and sensitivities |
| title_fullStr | Scalar Co-SIMP dark matter: models and sensitivities |
| title_full_unstemmed | Scalar Co-SIMP dark matter: models and sensitivities |
| title_short | Scalar Co-SIMP dark matter: models and sensitivities |
| title_sort | scalar co simp dark matter models and sensitivities |
| topic | Cosmology of Theories BSM Early Universe Particle Physics Models for Dark Matter Particle Nature of Dark Matter |
| url | https://doi.org/10.1007/JHEP08(2023)091 |
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