Dark matter from higher-dimensional primordial black holes

被引:10
作者
Friedlander, Avi [1 ,2 ]
Song, Ningqiang [3 ,4 ]
Vincent, Aaron C. [1 ,2 ,5 ]
机构
[1] Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada
[2] Arthur B McDonald Canadian Astroparticle Phys Res, Kingston, ON K7L 3N6, Canada
[3] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
[4] Univ Liverpool, Dept Math Sci, Liverpool L69 7ZL, Merseyside, England
[5] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada
基金
英国科学技术设施理事会; 加拿大自然科学与工程研究理事会; 中国国家自然科学基金; 加拿大创新基金会;
关键词
CONSTRAINTS; EVAPORATION; HIERARCHY; PARTICLE; GRAVITY; RELICS; BRANE;
D O I
10.1103/PhysRevD.108.043523
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The evaporation of primordial black holes provides a promising dark matter production mechanism without relying on any nongravitational interactions between the dark sector and the Standard Model. In theories of "large" extra dimensions (LEDs), the true scale of quantum gravity, M-*, could be well below the Planck scale, thus allowing for energetic particle collisions to produce microscopic black holes in the primordial plasma at temperatures as low as T greater than or similar to 100 GeV. Additionally, LEDs modify the relationship between black hole mass, radius, and temperature, allowing microscopic black holes to grow to macroscopic sizes in the early Universe. In this work we study three scenarios for the production of dark matter via LED black holes: (1) delayed evaporating black holes (DEBHs) which grow to macroscopic sizes before ultimately evaporating, (2) instantly evaporating black holes (IEBHs) which immediately evaporate, and (3) stable black hole relics with a mass M-* known as Planckeons. For a given reheating temperature, T-RH, we show that DEBHs produce significantly less dark matter than both IEBHs and Planckeons. IEBHs are able to produce the observed relic abundance of dark matter so long as the reheating scale is in the range 10(-2) <= T-RH/M-* <= 10(-1). We calculate the average speed for the resulting dark matter and show that it would be sufficiently cold for all dark matter masses m(dm) greater than or similar to 10(-4) GeV. This mechanism is viable for any scale of quantum gravity in the range 10(4) GeV <= M-* <= M-Pl and for any number of LEDs.
引用
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页数:18
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