Doubly peaked induced stochastic gravitational wave background: testing baryogenesis from primordial black holes

Bhaumik, Nilanjandev; Ghoshal, Anish; Lewicki, Marek

doi:10.1007/jhep07(2022)130

Cited by 49 publications

(19 citation statements)

References 137 publications

(161 reference statements)

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“…Remarkably, for model II, we observe that the double rises in GWs are detectable by LISA and SKA. A similar feature has been observed (in Bhaumik et al 2022) as a signal of a nonthermal baryogenesis from evaporating PBHs.…”

Section: Primordial and Induced Gwssupporting

confidence: 81%

Inflation from Multiple Pseudo-scalar Fields: Primordial Black Hole Dark Matter and Gravitational Waves

Talebian

Mansoori

Firouzjahi

2023

ApJ

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We study a model of inflation with multiple pseudo-scalar fields coupled to a U(1) gauge field through Chern–Simons interactions. Because of parity-violating interactions, one polarization of the gauge field is amplified, yielding to an enhanced curvature perturbation power spectrum. Inflation proceeds in multiple stages, as each pseudo-scalar field rolls toward its minimum, yielding to distinct multiple peaks in the curvature perturbation power spectra at various scales during inflation. The localized peaks in the power spectra generate primordial black holes that can furnish a large fraction of dark matter abundance. In addition, gravitational waves with nontrivial spectra are generated that are in the sensitivity ranges of various forthcoming GW observatories.

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Section: Primordial and Induced Gwssupporting

confidence: 81%

Inflation from Multiple Pseudo-scalar Fields: Primordial Black Hole Dark Matter and Gravitational Waves

Talebian

Mansoori

Firouzjahi

2023

ApJ

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“…The same may happen in the scattering of Dirac neutrinos, because of the repulsion between their magnetic moments [35]. Ultralight primordial black holes may also be associated to other interesting phenomena, for example an alleviation of the current tension in the Hubble constant measurement [39,40] or a possible solution for the baryon asymmetry problem [41][42][43], in both cases due to their Hawking evaporation. The existence of an early matter-dominated era triggered by microscopic black holes has been also investigated [44], giving rise to a rich gravitational wave phenomenology [45,46].…”

Section: Discussionmentioning

confidence: 99%

Remnant loop quantum black holes

Borges,

Baranov,

Sobrinho

et al. 2024

Class. Quantum Grav.

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Polymer models inspired by Loop Quantum Gravity (LQG) have been used to describe non-singular quantum black holes with spherical symmetry, with the classical singularity replaced by a transition from a black hole to a white hole. A recent model, with a single polymerisation parameter, leads to a symmetric transition with same mass for the black and white phases, and to an asymptotically flat exterior metric. The radius of the transition surface is, however, not fixed, increasing with the mass. Following similar procedures, in a previous paper we have fixed that radius by identifying the minimal area on the transition surface with the area gap of LQG. This allowed to find a dependence of the polymerisation parameter on the black hole mass, with the former increasing as the latter decreases. It also permitted to extend the model to Planck scale black holes, with quantum fluctuations remaining small at the horizon. In the present paper we extend this analysis to charged black holes, showing that the Cauchy horizon lies beyond of the transition surface. We also show the existence of limiting states with zero surface gravity, the lightest one with $Q = 0$ and $m = \sqrt{2}/4$, and the heaviest with $Q = m = \sqrt{2}/2$. Using our solutions to approximate quasi-steady horizons, we show that Hawking evaporation leads asymptotically to these extremal states, leaving remnant black holes of Planck size.

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“…The detection of such signals will opens up a compelling new window into the pre-BBN Universe. In fact it can even help probing new physics beyond the SM, as for example GUT-scale physics, high scale baryogenesis and leptogenesis physics [116,[184][185][186][187][188][189] which are otherwise beyond the reach of LHC or other laboratory or astrophysical searches for new physics. In this work, we studied the non-thermal production of dark matter within a non-standard cosmological framework with large GW signals arising from first-order inflationary tensor perturbations, the GW spectrum of which are different from each other cosmic sources described above.…”

Section: Discussionmentioning

confidence: 99%

Signatures of non-thermal dark matter with kination and early matter domination. Gravitational waves versus laboratory searches

Ghoshal

Heurtier

Paul

2022

J. High Energ. Phys.

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The non-thermal production of dark matter (DM) usually requires very tiny couplings of the dark sector with the visible sector and therefore is notoriously challenging to hunt in laboratory experiments. Here we propose a novel pathway to test such a production in the context of a non-standard cosmological history, using both gravitational wave (GW) and laboratory searches. We investigate the formation of DM from the decay of a scalar field that we dub as the reheaton, as it also reheats the Universe when it decays. We consider the possibility that the Universe undergoes a phase with kination-like stiff equation-of-state (wkin> 1/3) before the reheaton dominates the energy density of the Universe and eventually decays into Standard Model and DM particles. We then study how first-order tensor perturbations generated during inflation, the amplitude of which may get amplified during the kination era and lead to detectable GW signals. Demanding that the reheaton produces the observed DM relic density, we show that the reheaton’s lifetime and branching fractions are dictated by the cosmological scenario. In particular, we show that it is long-lived and can be searched by various experiments such as DUNE, FASER, FASER-II, MATHUSLA, SHiP, etc. We also identify the parameter space which leads to complementary observables for GW detectors such as LISA and u-DECIGO. In particular we find that a kination-like period with an equation-of-state parameter wkin ≈ 0.5 and a reheaton mass $$ \mathcal{O} $$ O (0.5–5) GeV and a DM mass of $$ \mathcal{O} $$ O (10–100) keV may lead to sizeable imprints in both kinds of searches.

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Doubly peaked induced stochastic gravitational wave background: testing baryogenesis from primordial black holes

Cited by 49 publications

References 137 publications

Inflation from Multiple Pseudo-scalar Fields: Primordial Black Hole Dark Matter and Gravitational Waves

Inflation from Multiple Pseudo-scalar Fields: Primordial Black Hole Dark Matter and Gravitational Waves

Remnant loop quantum black holes

Signatures of non-thermal dark matter with kination and early matter domination. Gravitational waves versus laboratory searches

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