Probing sterile neutrino freeze-in at stronger coupling
Abstract The regime of dark matter (DM) freeze-in at stronger coupling interpolates between freeze-in and freeze-out. It relies on Boltzmann-suppressed dark matter production, implying that the Standard Model bath temperature never exceeds the dark matter mass. In this work, we study this regime in...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13583-y |
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| author | Niko Koivunen Oleg Lebedev Martti Raidal |
| author_facet | Niko Koivunen Oleg Lebedev Martti Raidal |
| author_sort | Niko Koivunen |
| collection | DOAJ |
| description | Abstract The regime of dark matter (DM) freeze-in at stronger coupling interpolates between freeze-in and freeze-out. It relies on Boltzmann-suppressed dark matter production, implying that the Standard Model bath temperature never exceeds the dark matter mass. In this work, we study this regime in the context of sterile neutrino dark matter, which can be sufficiently long-lived for a tiny sterile-active mixing. The sterile neutrino is assumed to couple to a real singlet scalar, providing for a thermal production mechanism of the former. We find that DM mass can range from GeV to tens of TeV consistently with all the constraints. The most interesting aspect of the consequent freeze-in phenomenology is that the sterile neutrino dark matter can be probed efficiently by both direct detection experiments and invisible Higgs decay at the LHC. |
| format | Article |
| id | doaj-art-a5f9a522df9c45f182aa3f1b660b3220 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-a5f9a522df9c45f182aa3f1b660b32202024-12-29T12:43:14ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-11-01841111010.1140/epjc/s10052-024-13583-yProbing sterile neutrino freeze-in at stronger couplingNiko Koivunen0Oleg Lebedev1Martti Raidal2Laboratory of High Energy and Computational Physics, NICPBDepartment of Physics and Helsinki Institute of Physics, University of HelsinkiLaboratory of High Energy and Computational Physics, NICPBAbstract The regime of dark matter (DM) freeze-in at stronger coupling interpolates between freeze-in and freeze-out. It relies on Boltzmann-suppressed dark matter production, implying that the Standard Model bath temperature never exceeds the dark matter mass. In this work, we study this regime in the context of sterile neutrino dark matter, which can be sufficiently long-lived for a tiny sterile-active mixing. The sterile neutrino is assumed to couple to a real singlet scalar, providing for a thermal production mechanism of the former. We find that DM mass can range from GeV to tens of TeV consistently with all the constraints. The most interesting aspect of the consequent freeze-in phenomenology is that the sterile neutrino dark matter can be probed efficiently by both direct detection experiments and invisible Higgs decay at the LHC.https://doi.org/10.1140/epjc/s10052-024-13583-y |
| spellingShingle | Niko Koivunen Oleg Lebedev Martti Raidal Probing sterile neutrino freeze-in at stronger coupling European Physical Journal C: Particles and Fields |
| title | Probing sterile neutrino freeze-in at stronger coupling |
| title_full | Probing sterile neutrino freeze-in at stronger coupling |
| title_fullStr | Probing sterile neutrino freeze-in at stronger coupling |
| title_full_unstemmed | Probing sterile neutrino freeze-in at stronger coupling |
| title_short | Probing sterile neutrino freeze-in at stronger coupling |
| title_sort | probing sterile neutrino freeze in at stronger coupling |
| url | https://doi.org/10.1140/epjc/s10052-024-13583-y |
| work_keys_str_mv | AT nikokoivunen probingsterileneutrinofreezeinatstrongercoupling AT oleglebedev probingsterileneutrinofreezeinatstrongercoupling AT marttiraidal probingsterileneutrinofreezeinatstrongercoupling |