Nonthermal dark matter from modified early matter domination
Nonthermal dark matter from modified early matter domination
复制标题
来自改良的早期物质统治的非热暗物质
DOI:
10.1103/physrevd.99.083517
复制
发表时间:
2019
影响因子:
5
通讯作者:
Osiński, Jacek K.
中科院分区:
文献类型:
--
作者:
Allahverdi, Rouzbeh;Osiński, Jacek K.
Thermal freeze-out or freeze-in during a period of early matter domination can give rise to the correct dark matter abundance for. In the standard scenario, a single field that behaves like matter drives the early matter dominated era. However, in realistic models, this epoch may involve more than one field. In this paper, we study the effect of such a modification on the production of dark matter during early matter domination. We show that even a subdominant second field that decays much faster than the dominant one can considerably enhance the temperature of the Universe during an early matter-dominated phase. This in turn affects dark matter production via freeze-out/in and opens up the allowed parameter space toward significantly larger dark matter masses. As a result, one can comfortably obtain the correct relic abundance for PeV-scale dark matter for reheating temperatures at or below 10 GeV.
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DOI:
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发表时间:
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期刊:
arXiv: High Energy Physics - Theory
影响因子:
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