SIMPle Dark Matter: Self-Interactions and keV Lines
| Autor: | Boddy, Kimberly K., Feng, Jonathan L., Kaplinghat, Manoj, Shadmi, Yael, Tait, Timothy M. P. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 90, 095016 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.90.095016 |
| Popis: | We consider a simple supersymmetric hidden sector: pure SU(N) gauge theory. Dark matter is made up of hidden glueballinos with mass $m_X$ and hidden glueballs with mass near the confinement scale $\Lambda$. For $m_X \sim 1\,\text{TeV}$ and $\Lambda \sim 100\,\text{MeV}$, the glueballinos freeze out with the correct relic density and self-interact through glueball exchange to resolve small-scale structure puzzles. An immediate consequence is that the glueballino spectrum has a hyperfine splitting of order $\Lambda^2 / m_X \sim 10\,\text{keV}$. We show that the radiative decays of the excited state can explain the observed 3.5 keV X-ray line signal from clusters of galaxies, Andromeda, and the Milky Way. Comment: v1: 6 pages, 2 figures; v2: added references, published version; v3: note added |
| Databáze: | arXiv |
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