SIMPly add a dark photon
Abstract Pions of a dark sector gauge group can be strongly interacting massive particle (SIMP) dark matter, produced by the freeze-out of 3 → 2 interactions, with naturally large self-interactions. We study if adding a dark photon to the set-up can do it all: i) maintain thermalization with the vis...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-03-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP03(2023)216 |
| _version_ | 1827917189675483136 |
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| author | Pieter Braat Marieke Postma |
| author_facet | Pieter Braat Marieke Postma |
| author_sort | Pieter Braat |
| collection | DOAJ |
| description | Abstract Pions of a dark sector gauge group can be strongly interacting massive particle (SIMP) dark matter, produced by the freeze-out of 3 → 2 interactions, with naturally large self-interactions. We study if adding a dark photon to the set-up can do it all: i) maintain thermalization with the visible sector, ii) resonantly enhance the 3 → 2 interactions, thus allowing for a perturbative pion description, and iii) provide a velocity dependent self-interaction that can affect small scale structure formation. For N f = 3 this minimal setup is marginally excluded, as the required kinetic mixing is too small to maintain thermal equilibrium with the SM. Adding an extra dark quark opens up parameter space, and — perhaps somewhat surprisingly — we find that all bounds can be satisfied for dark pion masses m π ∼ 250 − 600 MeV. Dropping the small scale structure requirement iii), a viable setup is reproduced for dark charges of α d = 0.01 − 1 and a dark pion mass m π ≥ 30 MeV. Late time annihilations are non-negligible making the SIMP dark pion a bit WIMPy. |
| first_indexed | 2024-03-13T03:25:15Z |
| format | Article |
| id | doaj.art-73a34d41b05f44b59e243a3d2cc893e2 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-13T03:25:15Z |
| publishDate | 2023-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-73a34d41b05f44b59e243a3d2cc893e22023-06-25T11:07:07ZengSpringerOpenJournal of High Energy Physics1029-84792023-03-012023313610.1007/JHEP03(2023)216SIMPly add a dark photonPieter Braat0Marieke Postma1Theory Group, NikhefTheory Group, NikhefAbstract Pions of a dark sector gauge group can be strongly interacting massive particle (SIMP) dark matter, produced by the freeze-out of 3 → 2 interactions, with naturally large self-interactions. We study if adding a dark photon to the set-up can do it all: i) maintain thermalization with the visible sector, ii) resonantly enhance the 3 → 2 interactions, thus allowing for a perturbative pion description, and iii) provide a velocity dependent self-interaction that can affect small scale structure formation. For N f = 3 this minimal setup is marginally excluded, as the required kinetic mixing is too small to maintain thermal equilibrium with the SM. Adding an extra dark quark opens up parameter space, and — perhaps somewhat surprisingly — we find that all bounds can be satisfied for dark pion masses m π ∼ 250 − 600 MeV. Dropping the small scale structure requirement iii), a viable setup is reproduced for dark charges of α d = 0.01 − 1 and a dark pion mass m π ≥ 30 MeV. Late time annihilations are non-negligible making the SIMP dark pion a bit WIMPy.https://doi.org/10.1007/JHEP03(2023)216Models for Dark MatterParticle Nature of Dark Matter |
| spellingShingle | Pieter Braat Marieke Postma SIMPly add a dark photon Journal of High Energy Physics Models for Dark Matter Particle Nature of Dark Matter |
| title | SIMPly add a dark photon |
| title_full | SIMPly add a dark photon |
| title_fullStr | SIMPly add a dark photon |
| title_full_unstemmed | SIMPly add a dark photon |
| title_short | SIMPly add a dark photon |
| title_sort | simply add a dark photon |
| topic | Models for Dark Matter Particle Nature of Dark Matter |
| url | https://doi.org/10.1007/JHEP03(2023)216 |
| work_keys_str_mv | AT pieterbraat simplyaddadarkphoton AT mariekepostma simplyaddadarkphoton |