Cannibalism's lingering imprint on the matter power spectrum
Cannibalism's lingering imprint on the matter power spectrum
复制标题
食人行为在物质功率谱上留下了挥之不去的印记
DOI:
10.1088/1475-7516/2022/01/017
复制
发表时间:
2022
影响因子:
6.4
通讯作者:
Shelton, Jessie
中科院分区:
文献类型:
--
作者:
Erickcek, Adrienne L.;Ralegankar, Pranjal;Shelton, Jessie
The early universe may have contained internally thermalized dark sectors that were decoupled from the Standard Model. In such scenarios, the relic dark thermal bath, composed of the lightest particle in the dark sector, can give rise to an epoch of early matter domination prior to Big Bang Nucleosynthesis, which has a potentially observable impact on the smallest dark matter structures. This lightest dark particle can easily and generically have number-changing self-interactions that give rise to" cannibal" behavior. We consider cosmologies where an initially sub-dominant cannibal species comes to temporarily drive the expansion of the universe, and we provide a simple map between the particle properties of the cannibal species and the key features of the enhanced dark matter perturbation growth in such cosmologies. We further demonstrate that cannibal self-interactions can determine the small-scale cutoff in the matter power spectrum even when the cannibal self-interactions freeze out prior to cannibal domination.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
M. Kawasaki;K. Kohri;N. Sugiyama
通讯作者:
N. Sugiyama
影响因子:
5.4
作者:
D. Pappadopulo;J. Ruderman;Gabriele Trevisan
通讯作者:
Gabriele Trevisan
影响因子:
6.4
作者:
S. Heimersheim;Nils Schöneberg;D. C. Hooper;J. Lesgourgues
通讯作者:
S. Heimersheim;Nils Schöneberg;D. C. Hooper;J. Lesgourgues
影响因子:
6.4
作者:
Vincent S. H. Lee;S. Taylor;T. Trickle;K. Zurek
通讯作者:
Vincent S. H. Lee;S. Taylor;T. Trickle;K. Zurek
影响因子:
4.9
作者:
Ackermann, M.;Ajello, M.;Zimmer, S.
通讯作者:
Zimmer, S.