Induced gravitational waves from the cosmic coincidence

被引：35

作者：

Balaji, Shyam ^{[1
,2
,3
,4
]}

Silk, Joseph ^{[3
,4
,5
,6
]}

Wu, Yi-Peng ^{[1
,2
]}

机构：

[1] CNRS, UMR 7589, Lab Phys Theor & Hautes Energies LPTHE, 4 Pl Jussieu, F-75252 Paris, France

[2] Sorbonne Univ, 4 Pl Jussieu, F-75252 Paris, France

[3] CNRS, UMR 7095, Inst Astrophys Paris, 98 Bis Blvd Arago, F-75014 Paris, France

[4] Sorbonne Univ, 98 Bis Blvd Arago, F-75014 Paris, France

[5] Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA

[6] Univ Oxford, Beecroft Inst Particle Astrophys & Cosmol, Keble Rd, Oxford OX1 3RH, England

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2022年 / 06期

基金：

欧洲研究理事会;

关键词：

baryon asymmetry; inflation; physics of the early universe; primordial black holes;

D O I：

10.1088/1475-7516/2022/06/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The induced gravitational wave (GW) background from enhanced primordial scalar perturbations is one of the most promising observational consequences of primordial black hole (PBH) formation from inflation. We investigate the induced GW spectrum Omega(IGW) from single-field inflation in the general ultra-slow-roll (USR) framework, restricting the peak frequency band to be inside 10(-3)-1 Hz and saturating PBH abundance to comprise all dark matter (DM) in the ultralight asteroid-mass window. By invoking successful baryogenesis driven by USR inflation, we verify the viable parameter space for the specific density ratio between baryons and PBH DM observed today, the so-called "cosmic coincidence." We show that the cosmic coincidence requirement bounds the spectral index nuv in the high frequency limit, Omega(IGW)(f >> 1) proportional to f(-2)(nuv), into 0 < n(UV) < 1, which implies that baryogenesis triggered by USR inflation for PBHs in the mass range of 10(-16)-10(-2) M-circle dot can be tested by upcoming Advanced LIGO and Virgo data and next generation experiments such as LISA, Einstein Telescope, TianQin and DECIGO.

引用

页数：26

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