Primordial dark matter from curvature induced symmetry breaking
Autor: | Laulumaa, Laura, Markkanen, Tommi, Nurmi, Sami |
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Rok vydání: | 2020 |
Předmět: | |
Zdroj: | JCAP 08 (2020) 002 |
Druh dokumentu: | Working Paper |
DOI: | 10.1088/1475-7516/2020/08/002 |
Popis: | We demonstrate that adiabatic dark matter can be generated by gravity induced symmetry breaking during inflation. We study a $Z_2$ symmetric scalar singlet that couples to other fields only through gravity and for which the symmetry is broken by the spacetime curvature during inflation when the non-minimal coupling $\xi$ is negative. We find that the symmetry breaking leads to the formation of adiabatic dark matter with the observed abundance for the singlet mass $m\sim{\rm MeV}$ and $|\xi|\sim 1$. Comment: 13 pages, 5 figures. v2; minor edits, published in JCAP |
Databáze: | arXiv |
Externí odkaz: |
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