A New Window into Gravitationally Produced Scalar Dark Matter
| Autor: | Garcia, Marcos A. G., Pierre, Mathias, Verner, Sarunas |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Hubble constant
Cosmology and Nongalactic Astrophysics (astro-ph.CO) relic density coupling nonminimal coupling minimal FOS: Physical sciences cosmic background radiation General Relativity and Quantum Cosmology (gr-qc) tension power spectrum General Relativity and Quantum Cosmology isocurvature High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) gravitation nucleosynthesis big bang inflation dark matter scalar dark matter mass Astrophysics - Cosmology and Nongalactic Astrophysics |
| DOI: | 10.3204/PUBDB-2023-03257 |
| Popis: | Conventional scenarios of purely gravitationally produced dark matter with masses below the Hubble parameter at the end of inflation are in tension with Cosmic Microwave Background (CMB) constraints on the isocurvature power spectrum. We explore a more general scenario with a non-minimal coupling between the scalar dark matter field and gravity, which allows for significantly lighter scalar dark matter masses compared to minimal coupling predictions. By imposing relic abundance, isocurvature, Lyman-$\alpha$, and Big Bang Nucleosynthesis (BBN) constraints, we show the viable parameter space for these models. Our findings demonstrate that the presence of a non-minimal coupling expands the parameter space, yielding a dark matter mass lower bound of $2 \times 10^{-4} \, \rm{eV}$. Comment: 6 pages, 3 figures (Supplementary Material: 14 pages, 6 figures) |
| Databáze: | OpenAIRE |
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