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The dark universe: Primordial black hole ⇋ dark graviton gas connection
Physics Letters B, 2023 We study the possible correspondence between 5-dimensional primordial black holes and massive 5-dimensional KK gravitons as dark matter candidate within the recently proposed dark dimension scenario that addresses the cosmological hierarchy problem ...
Luis A. Anchordoqui +2 more
doaj +1 more source
On the primordial black hole mass function for broad spectra
Physics Letters B, 2020 We elaborate on the mass function of primordial black holes in the case in which the power spectrum of the curvature perturbation is broad. For the case of a broad and flat spectrum, we argue that such a mass function is peaked at the smallest primordial
V. De Luca, G. Franciolini, A. Riotto
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Proceedings of 2nd World Summit: Exploring the Dark Side of the Universe — PoS(EDSU2018), 2018 Primordial Black Holes (PBH) can form after inflation due to high peaks in the primordial curvature power spectrum that collapse gravitationally during the radiation era, to form clusters of black holes that merge and increase in mass after recombination, generating today a broad mass-spectrum of black holes with masses ranging from 0.01 to $10^3~M_ ...
openaire +1 more source
Control Strategies in Guanine Biocrystallization
Angewandte Chemie, Volume 138, Issue 18, 27 April 2026.Biological guanine crystals produce spectacular photonic phenomena in animals and hold great promise as new, sustainable optical materials. We review how organisms precisely control the structure, morphologies, and resulting optical properties of these crystals using a set of ingenious ‘design’ strategies, including control of pH, template‐directed ...
Shashanka S. Indri +2 more
wiley +2 more sources
Primordial Regular Black Holes: Thermodynamics and Dark Matter
Universe, 2018 The possibility that dark matter particles could be constituted by extreme regular primordial black holes is discussed. Extreme black holes have zero surface temperature, and are not subjected to the Hawking evaporation process.
José Antonio de Freitas Pacheco
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Primordial black holes in matter-dominated eras: The role of accretion
Physics Letters B, 2022 We consider the role of secondary infall and accretion onto an initially overdense perturbation in matter-dominated eras, like the one which is likely to follow the end of inflation.
Valerio De Luca +4 more
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Evolution of Primordial Black Holes in Loop Quantum Gravity
, 2011 In this work, we study the evolution of Primordial Black Holes within the context of Loop Quantum Gravity. First we calculate the scale factor and energy density of the universe for different cosmic era and then taking these as inputs we study evolution ...
B. Nayak +4 more
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Search for Primordial Black Hole Evaporation with VERITAS
, 2017 Primordial black holes are black holes that may have formed from density fluctuations in the early universe. It has been theorized that black holes slowly evaporate.
Archambault, Simon
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Primordial black holes as dark matter candidates
SciPost Physics Lecture Notes, 2022 We review the formation and evaporation of primordial black holes (PBHs) and their possible contribution to dark matter. Various constraints suggest they could only provide most of it in the mass windows $10^{17}$ - $10^{23}\,$g or $10$ - $10^{2}\,M_ ...
Bernard Carr, Florian Kuhnel
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Brans-Dicke Theory and primordial black holes in Early Matter-Dominated Era
, 2011 We show that primordial black holes can be formed in the matter-dominated era with gravity described by the Brans-Dicke theory. Considering an early matter-dominated era between inflation and reheating, we found that the primordial black holes formed ...
A. Barrau +67 more
core +1 more source