Non-thermal Origin of Asymmetric Dark Matter from Inflaton and Primordial Black Holes

Barman, Basabendu; Borah, Debasish; Das, Suruj Jyoti; Roshan, Rishav

doi:10.48550/arxiv.2111.08034

Cited by 5 publications

(5 citation statements)

References 134 publications

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“…In the case of BHs produced at colliders, this provides a potential window into the dark sector [125]. PBHs produced in the early Universe could also evaporate to yield the relic abundance of dark matter [126][127][128][129]; this behaviour would change in the presence of extra dimensions.…”

Section: Discussionmentioning

confidence: 99%

Primordial Black Hole Dark Matter in the Context of Extra Dimensions

Friedlander,

Mack,

Schon

et al. 2022

Preprint

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Theories of large extra dimensions (LEDs) such as the Arkani-Hamed, Dimopoulos & Dvali scenario predict a "true" Planck scale M near the TeV scale, while the observed M pl is due to the geometric effect of compact extra dimensions. These theories allow for the creation of primordial black holes (PBHs) in the early Universe, from the collisional formation and subsequent accretion of black holes in the high-temperature plasma, leading to a novel cold dark matter (sub)component. Because of their existence in a higher-dimensional space, the usual relationship between mass, radius and temperature is modified, leading to distinct behaviour with respect to their 4-dimensional counterparts. Here, we derive the cosmological creation and evolution of such PBH candidates, including the greybody factors describing their evaporation, and obtain limits on LED PBHs from direct observation of evaporation products, effects on big bang nucleosynthesis, and the cosmic microwave background angular power spectrum. Our limits cover scenarios of 2 to 6 extra dimensions, and PBH masses ranging from 1 to 10 22 g. We find that for two extra dimensions, LED PBHs represent a viable dark matter candidate with a range of possible black hole masses between 10 18 and 10 24 g depending on the Planck scale and reheating temperature. For M = 10 TeV, this corresponds to PBH dark matter with a mass of M 10 22 g, unconstrained by current observations. We further refine and update constraints on "ordinary" four-dimension black holes.

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Section: Discussionmentioning

confidence: 99%

Primordial Black Hole Dark Matter in the Context of Extra Dimensions

Friedlander,

Mack,

Schon

et al. 2022

Preprint

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“…Using the comoving energy density of radiation and PBH defined as ρr ≡ a 4 × ρ r and ρBH ≡ a 3 × ρ BH , where a represents the scale factor, the Boltzmann equations governing the evolution of the Universe are given by [10,50,[57][58][59]:…”

Section: Jcap07(2024)064 3 Gravitational Wave Production From Pbh Eva...mentioning

confidence: 99%

Gravitational wave sourced by decay of massive particle from primordial black hole evaporation

Choi,

Lkhagvadorj,

Mahapatra

2024

J. Cosmol. Astropart. Phys.

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In this article, we investigate the stochastic gravitational waves (GWs) spectrum, resulting from the emission of gravitons through bremsstrahlung, in the decay of particles produced by Hawking radiation. Although particle decays inevitably entail the emission of graviton due to bremsstrahlung, the associated decay width is notably suppressed due to the Planck scale suppression in the coupling of matter fields to gravitons. Consequently, the relic abundance of such GWs constituted of these gravitons undergoes a corresponding reduction. However, we demonstrate that super-heavy particles, reaching masses as high as Planck scale, can emerge naturally in the Hawking radiation of evaporating primordial black holes (PBHs) and can compensate for this suppression. In addition, we also discuss the stochastic gravitational waves constituted out of the gravitons directly radiated from such evaporating PBHs. When the super-heavy particle decays promptly after its production, then the corresponding GW spectrum remains subdominant to the one arising from direct PBH evaporation. However, if this particle is long-lived and decays after PBH evaporation, then the resulting GWs produced in these two processes have two distinct spectra with their peaks at extremely high frequencies, providing avenues for proposed ultra-high frequency gravitational wave detectors. We also show that such gravitational waves contribute significantly to substantial dark radiation, which can be probed with the enhanced sensitivity of future experiments.

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“…Earlier works by Hawking [5], Carr [6], Zeldovich [7] and others have shown that the population of ultra-low mass primordial black holes (PBH) in the very early universe can provide a viable non-thermal baryogenesis mechanism through their Hawking radiation. This scenario has been studied both in the context of grand unified theories (GUTs) [8][9][10][11][12] and for baryogenesis via leptogenesis models [13][14][15][16][17][18][19]. In GUT baryogenesis models, near the end of the PBH evaporation process, they emit massive particles when their horizon temperature exceeds the GUT scale.…”

Section: Contents 1 Introductionmentioning

confidence: 99%

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

Bhaumik,

Ghoshal,

Lewicki

2022

Preprint

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Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the universe and evaporate before the big bang nucleosynthesis. We propose a novel test of this scenario by detecting its characteristic doubly peaked gravitational wave (GW) spectrum in future GW observatories. Here the first order adiabatic perturbation from inflation and from the isocurvature perturbations due to PBH distribution, source tensor perturbations in second-order and lead to two peaks in the induced GW background. These resonant peaks are generated at the beginning of standard radiation domination in the presence of a prior PBH-dominated era. This unique GW spectral shape would provide a smoking gun signal of non-thermal baryogenesis from evaporating PBHs, which is otherwise impossible to test in laboratory experiments due to the very high energy scales involved or the feeble interaction of the dark sector with the visible sector.

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Non-thermal Origin of Asymmetric Dark Matter from Inflaton and Primordial Black Holes

Cited by 5 publications

References 134 publications

Primordial Black Hole Dark Matter in the Context of Extra Dimensions

Primordial Black Hole Dark Matter in the Context of Extra Dimensions

Gravitational wave sourced by decay of massive particle from primordial black hole evaporation

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

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