Cannibal domination and the matter power spectrum
Cannibal domination and the matter power spectrum
复制标题
食人统治和物质功率谱
DOI:
10.1103/physrevd.103.103508
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发表时间:
2021
影响因子:
5
通讯作者:
Shelton, Jessie
中科院分区:
文献类型:
--
作者:
Erickcek, Adrienne L.;Ralegankar, Pranjal;Shelton, Jessie
Decoupled hidden sectors can easily and generically result in a period of cannibal domination, during which the dominant component of the Universe has an equation of state intermediate between radiation and matter due to self-heating by number-changing interactions. We present for the first time the consequences of a cannibal-dominated era prior to big bang nucleosynthesis for structure formation on small scales. We find that an early cannibal-dominated era imprints a characteristic peak on the dark matter power spectrum, with scale and amplitude directly determined by the mass, lifetime, and number-changing interaction strength of the cannibal field. This enhancement to the small-scale matter power spectrum will generate early-forming dark matter microhalos, and we provide a detailed and transparent map between the properties of the cannibal species and the characteristic mass and formation time of these structures. These relations demonstrate how the internal workings of a hidden sector leave a potentially observable imprint on the matter power spectrum even if dark matter has no direct couplings to the Standard Model.
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影响因子:
6.4
作者:
Hasegawa Takuya;Hiroshima Nagisa;Kohri Kazunori;Hansen Rasmus S.L.;Tram Thomas;Hannestad Steen
通讯作者:
Hannestad Steen
影响因子:
6.4
作者:
Yue Zhang
通讯作者:
Yue Zhang
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
O. F. Piattella;D. Rodrigues;J. Fabris;J. Pacheco
通讯作者:
J. Pacheco
DOI:
10.1086/174465
发表时间:
1994
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Machacek
通讯作者:
M. Machacek