Primordial dark matter from curvature induced symmetry breaking

Autor: Laulumaa, Laura, Markkanen, Tommi, Nurmi, Sami
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
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