Enhanced monochromatic photon emission from millicharged co-interacting dark matter
Abstract We study a millicharged co-interacting dark matter scenario, where the primary dark matter constituent is the dark photon A′ and the secondary component is the fermion χ. In this model, χ interacts with A′ via a U(1)′ interaction while being millicharged with respect to normal photons. Our...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-10-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP10(2024)026 |
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| author | Mingxuan Du Jia Liu Xiao-Ping Wang Tianhao Wu |
| author_facet | Mingxuan Du Jia Liu Xiao-Ping Wang Tianhao Wu |
| author_sort | Mingxuan Du |
| collection | DOAJ |
| description | Abstract We study a millicharged co-interacting dark matter scenario, where the primary dark matter constituent is the dark photon A′ and the secondary component is the fermion χ. In this model, χ interacts with A′ via a U(1)′ interaction while being millicharged with respect to normal photons. Our investigation focuses on the oscillation of A′ dark matter into photons within the background of χ particles, revealing that the A′ − χ scattering rate benefits from a Bose enhancement of the A′ final state. As the oscillation production rate is directly linked to the scattering rate, the conversion of A′ dark matter into monochromatic photons experiences significant amplification owing to this Bose enhancement, especially when the scattering rate Γsca approaches the dark photon mass m A ′ $$ {m}_{A^{\prime }} $$ . These converted monochromatic photons are detectable through radio telescopes and can induce distortions in the Cosmic Microwave Background (CMB) spectrum. We find that the sensitivity of radio telescopes and the constraints imposed by CMB distortion on the kinetic mixing parameter are notably heightened compared to scenarios without the subdominant millicharged dark matter. |
| format | Article |
| id | doaj-art-a3081c8374ac45d5a5690971504ae482 |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-a3081c8374ac45d5a5690971504ae4822025-08-20T02:20:37ZengSpringerOpenJournal of High Energy Physics1029-84792024-10-0120241011610.1007/JHEP10(2024)026Enhanced monochromatic photon emission from millicharged co-interacting dark matterMingxuan Du0Jia Liu1Xiao-Ping Wang2Tianhao Wu3School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking UniversitySchool of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking UniversitySchool of Physics, Beihang UniversitySchool of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking UniversityAbstract We study a millicharged co-interacting dark matter scenario, where the primary dark matter constituent is the dark photon A′ and the secondary component is the fermion χ. In this model, χ interacts with A′ via a U(1)′ interaction while being millicharged with respect to normal photons. Our investigation focuses on the oscillation of A′ dark matter into photons within the background of χ particles, revealing that the A′ − χ scattering rate benefits from a Bose enhancement of the A′ final state. As the oscillation production rate is directly linked to the scattering rate, the conversion of A′ dark matter into monochromatic photons experiences significant amplification owing to this Bose enhancement, especially when the scattering rate Γsca approaches the dark photon mass m A ′ $$ {m}_{A^{\prime }} $$ . These converted monochromatic photons are detectable through radio telescopes and can induce distortions in the Cosmic Microwave Background (CMB) spectrum. We find that the sensitivity of radio telescopes and the constraints imposed by CMB distortion on the kinetic mixing parameter are notably heightened compared to scenarios without the subdominant millicharged dark matter.https://doi.org/10.1007/JHEP10(2024)026New Light ParticlesParticle Nature of Dark MatterNew Gauge InteractionsSpecific BSM Phenomenology |
| spellingShingle | Mingxuan Du Jia Liu Xiao-Ping Wang Tianhao Wu Enhanced monochromatic photon emission from millicharged co-interacting dark matter Journal of High Energy Physics New Light Particles Particle Nature of Dark Matter New Gauge Interactions Specific BSM Phenomenology |
| title | Enhanced monochromatic photon emission from millicharged co-interacting dark matter |
| title_full | Enhanced monochromatic photon emission from millicharged co-interacting dark matter |
| title_fullStr | Enhanced monochromatic photon emission from millicharged co-interacting dark matter |
| title_full_unstemmed | Enhanced monochromatic photon emission from millicharged co-interacting dark matter |
| title_short | Enhanced monochromatic photon emission from millicharged co-interacting dark matter |
| title_sort | enhanced monochromatic photon emission from millicharged co interacting dark matter |
| topic | New Light Particles Particle Nature of Dark Matter New Gauge Interactions Specific BSM Phenomenology |
| url | https://doi.org/10.1007/JHEP10(2024)026 |
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