Diurnal modulation signal from dissipative hidden sector dark matter
| Autor: | Robert Foot, Sunny Vagnozzi |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Physics Nuclear and High Energy Physics Hot dark matter Scalar field dark matter FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics lcsh:QC1-999 Dark matter halo High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Baryonic dark matter Mixed dark matter Warm dark matter Light dark matter lcsh:Physics Dark fluid Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Physics Letters B Physics Letters B, Vol 748, Iss C, Pp 61-66 (2015) |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/j.physletb.2015.06.063 |
| Popis: | We consider a simple generic dissipative dark matter model: a hidden sector featuring two dark matter particles charged under an unbroken $U(1)'$ interaction. Previous work has shown that such a model has the potential to explain dark matter phenomena on both large and small scales. In this framework, the dark matter halo in spiral galaxies features nontrivial dynamics, with the halo energy loss due to dissipative interactions balanced by a heat source. Ordinary supernovae can potentially supply this heat provided kinetic mixing interaction exists with strength $\epsilon \sim 10^{-9}$. This type of kinetically mixed dark matter can be probed in direct detection experiments. Importantly, this self-interacting dark matter can be captured within the Earth and shield a dark matter detector from the halo wind, giving rise to a diurnal modulation effect. We estimate the size of this effect for detectors located in the Southern hemisphere, and find that the modulation is large ($\gtrsim 10\%$) for a wide range of parameters. Comment: 12 pages, 4 figures, clarifying comments and references added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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