Exploring Evaporating Primordial Black Holes with Gravitational Waves

Domènech, Guillem; Takhistov, Volodymyr; Sasaki, Misao

doi:10.48550/arxiv.2105.06816

Cited by 9 publications

(12 citation statements)

References 48 publications

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“…However, in principle the two scenarios might be distinguished through a spectral analysis of the produced X-rays. Furthermore the evaporation of PBHs with M 10 9 g would lead to detectable density fluctuations induced by gravitational waves [97]. This intriguing scenario confirms once more the fundamental role of the elusive ALPs as cosmic messengers offering new opportunities to learn about the early Universe.…”

Section: Discussionmentioning

confidence: 53%

Axion-like particles from primordial black holes shining through the Universe

Schiavone,

Montanino,

Mirizzi

et al. 2021

Preprint

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We consider a cosmological scenario in which the very early Universe experienced a transient epoch of matter domination due to the formation of a large population of primordial black holes (PBHs) with masses M 10 9 g, that evaporate before Big Bang nucleosynthesis. In this context, Hawking radiation would be a non-thermal mechanism to produce a cosmic background of axion-like particles (ALPs). We assume the minimal scenario in which these ALPs couple only with photons. In the case of ultralight ALPs (m a 10 −9 eV) the cosmic magnetic fields might trigger ALP-photon conversions, while for masses m a 10 eV spontaneous ALP decay in photon pairs would be effective. We investigate the impact of these mechanisms on the cosmic X-ray background, on the excess in X-ray luminosity in Galaxy Clusters, and on the process of cosmic reionization.

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Section: Discussionmentioning

confidence: 53%

Axion-like particles from primordial black holes shining through the Universe

Schiavone,

Montanino,

Mirizzi

et al. 2021

Preprint

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“…During the time evolution of the GW spectrum one should take into account the fact that during a sudden transition from the PBH dominated era to the subsequent radiation era, in the case of a monochromatic PBH mass function as the one considered here, the GW is enhanced due a very rapid increase of the time derivative of the gravitational potential which is present in the source term (see Eq. (4.7)) as noted in [109,110].…”

Section: The Effect Of the Gravitational-wave Propagationmentioning

confidence: 56%

No constraints for f(T) gravity from gravitational waves induced from primordial black hole fluctuations

et al. 2023

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Primordial black hole (PBH) fluctuations can induce a stochastic gravitational wave background at second order, and since this procedure is sensitive to the underlying gravitational theory it can be used as a novel tool to test general relativity and extract constraints on possible modified gravity deviations. We apply this formalism in the framework of f(T) gravity, considering three viable mono-parametric models. In particular, we investigate the induced modifications at the level of the gravitational-wave source, which is encoded in terms of the power spectrum of the PBH gravitational potential, as well as at the level of their propagation, described in terms of the Green function which quantifies the propagator of the tensor perturbations. We find that, within the observationally allowed range of the f(T) model-parameters, the obtained deviations from general relativity, both at the levels of source and propagation, are practically negligible. Hence, we conclude that realistic and viable f(T) theories can safely pass the primordial black hole constraints, which may offer an additional argument in their favor.

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“…Among the various ways PBHs associate with GWs, we consider the one induced due to PBH density fluctuations [27][28][29][30][31][32]. For ultra-light PBH domination, this GW contribution remains detectable in ongoing and near-future experiments.…”

Section: Introductionmentioning

confidence: 99%

PBH-infused seesaw origin of matter and unique gravitational waves

Borah

Jyoti

Samanta

et al. 2023

J. High Energ. Phys.

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The Standard Model, extended with three right-handed (RH) neutrinos, is the simplest model that can explain light neutrino masses, the baryon asymmetry of the Universe, and dark matter (DM). Models in which RH neutrinos are light are generally easier to test in experiments. In this work, we show that, even if the RH neutrinos are super-heavy (Mi=1,2,3> 109 GeV)—close to the Grand Unification scale—the model can be tested thanks to its distinct features on the stochastic Gravitational Wave (GW) background. We consider an early Universe filled with ultralight primordial black holes (PBH) that produce a super-heavy RH neutrino DM via Hawking radiation. The other pair of RH neutrinos generates the baryon asymmetry via thermal leptogenesis, much before the PBHs evaporate. GW interferometers can test this novel spectrum of masses thanks to the GWs induced by the PBH density fluctuations. In a more refined version, wherein a U(1) gauge symmetry breaking dynamically generates the seesaw scale, the PBHs also cause observable spectral distortions on the GWs from the U(1)-breaking cosmic strings. Thence, a low-frequency GW feature related to DM genesis and detectable with a pulsar-timing array must correspond to a mid- or high-frequency GW signature related to baryogenesis at interferometer scales.

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Exploring Evaporating Primordial Black Holes with Gravitational Waves

Cited by 9 publications

References 48 publications

Axion-like particles from primordial black holes shining through the Universe

Axion-like particles from primordial black holes shining through the Universe

No constraints for f(T) gravity from gravitational waves induced from primordial black hole fluctuations

PBH-infused seesaw origin of matter and unique gravitational waves

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