Hybrid ?-attractors, primordial black holes and gravitational wave backgrounds

被引：34
|
作者：
Braglia, Matteo [1 ,2 ]
Linde, Andrei [3 ,4 ]
Kallosh, Renata [3 ,4 ]
Finelli, Fabio [2 ,5 ]
机构：
[1] NYU, Ctr Cosmol & Particle Phys, 726 Broadway, New York, NY 10003 USA
[2] INAF OAS Bologna, Via Gobetti 101, I-40129 Bologna, Italy
[3] Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USA
[4] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[5] INFN, Sez Bologna, Via Irnerio 46, I-40126 Bologna, Italy
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 04期
基金：
美国国家科学基金会;
关键词：
inflation; gravitational waves; sources; primordial black holes; TOPOLOGICAL DEFECTS; INITIAL CONDITIONS; INFLATION; FLUCTUATIONS; MONOPOLES; MODEL; BIG;
D O I：
10.1088/1475-7516/2023/04/033
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the two-stage inflation regime in the theory of hybrid cosmological alpha-attractors. The spectrum of inflationary perturbations is compatible with the latest Planck/BICEP/Keck Array results, thanks to the attractor properties of the model. However, at smaller scales, it may have a very high peak of controllable width and position, leading to a copious production of primordial black holes (PBH) and generation of a stochastic background of gravitational waves (SGWB).
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页数：36
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