Gravitational wave production right after a primordial black hole evaporation

Inomata, Keisuke; Kawasaki, Masahiro; Mukaida, Kyohei; Terada, Takahiro; Yanagida, Tsutomu T.

doi:10.1103/physrevd.101.123533

Cited by 118 publications

(163 citation statements)

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“…To conclude, the DM and DR production mechanism from the process of PBHs evaporation is an interesting and open issue, also in view of its connection with gravitational waves [5,12,17]. From the point of view of model building, it is a fascinating arena where to study different DM and DR candidates beyond the SM.…”

Section: Discussionmentioning

confidence: 99%

Dark matter and dark radiation from evaporating primordial black holes

2020

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The mechanism of the generation of dark matter and dark radiation from the evaporation of primordial black holes is very interesting. We consider the case of Kerr black holes to generalize previous results obtained in the Schwarzschild case. For dark matter, the results do not change dramatically and the bounds on warm dark matter apply similarly: in particular, the Kerr case cannot save the scenario of black hole domination for light dark matter. For dark radiation, the expectations for ∆N ef f do not change significantly with respect to the Schwarzschild case, but for an enhancement in the case of spin 2 particles: in the massless case, however, the projected experimental sensitivity would be reached only for extremal black holes.

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Section: Discussionmentioning

confidence: 99%

Dark matter and dark radiation from evaporating primordial black holes

2020

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“…Therefore, if one omits these bounds due to such uncertainty, PBHs can be allowed to even dominate the early Universe for a short amount of time before they completely vanish away. Other possible probes of light PBHs are provided by GWs, that can be produced by nonlinear effects related to the large curvature perturbation at small scales which produced the PBHs [865], through Hawking radiation [866,867,868,865] or by a coalescence of binary PBHs before the evaporation [866,867,869,870]. We also note that in some models, baryogenesis through nonthermal leptogenesis may be realized successfully by right-handed neutrinos produced by the huge amount of evaporating PBHs [871].…”

Section: The Microhalo Population Within Galaxiesmentioning

confidence: 97%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

185

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It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated during Big Bang Nucleosynthesis (BBN), there is scant evidence that the Universe was radiation dominated prior to BBN. It is therefore possible that the cosmological history was more complicated, with deviations from the standard radiation domination during the earliest epochs. Indeed, several interesting proposals regarding various topics such as the generation of dark matter, matter-antimatter asymmetry, gravitational waves, primordial black holes, or microhalos during a nonstandard expansion phase have been recently made. In this paper, we review various possible causes and consequences of deviations from radiation domination in the early Universe -taking place either before or after BBN -and the constraints on them, as they have been discussed in the literature during the recent years.

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“…For now, there still exists an open window 10 17 g PBH 10 21 g in the asteroid and sublunar mass range for PBHs to represent all of DM [6]. PBHs are also quite unconstrained in the lowest possible mass range 10 −1 g PBH 10 9 g as there is no known cosmological observable from those times, although gravitational astronomy may soon provide new possibilities [20][21][22] (ref. [20] already studied the effect on spin on the constraints).…”

Section: Jérémy Auffingermentioning

confidence: 99%