1. Bounds on dark matter annihilation cross-sections from inert doublet model in the context of 21-cm cosmology of dark ages
- Author
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Shibaji Banerjee, Madhurima Pandey, Rupa Basu, and Debasish Majumdar
- Subjects
Physics ,Inert ,Nuclear and High Energy Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Annihilation ,Dark matter ,FOS: Physical sciences ,Astronomy and Astrophysics ,Context (language use) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Atomic and Molecular Physics, and Optics ,Cosmology ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Brightness temperature ,Dark Ages ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We study the fluctuations in the brightness temperature of 21-cm signal $\delta T_{21}$ at the dark ages ($z\sim100$) with a dark matter candidate in Inter Doublet Model (IDM). We then explore the effects of different fractions of IDM dark matter on $\delta T_{21}$ signal. The IDM dark matter masses are chosen in few tens of GeV region as well as in the high mass region beyond 500 GeV. It has been observed that the $\delta T_{21}$ signal is more sensitive in the dark matter mass range of $70 - 80$ GeV. A lower bound on annihilation cross-section for this dark matter is also obtained analyzing the $\delta T_{21}$ signal. This is found to lie within the range $6.5 \times 10^{-29} \,\, \rm{cm^3 / sec} \leq \langle\sigma v\rangle \leq 4.88\times 10^{-26}\,\, \rm{cm^ 3 / sec}$ for the IDM dark matter mass range $10 \, {\rm GeV} \leq m_{\chi}\leq 990 \,{\rm GeV} $., Comment: 13 pages, 9 figures, 1 table, comments and suggestions are welcome
- Published
- 2021