Results 141 to 150 of about 38,917 (207)

Primordial black holes and the origin of the matter-antimatter asymmetry. [PDF]

Philos Trans A Math Phys Eng Sci, 2019
García-Bellido J.
europepmc   +1 more source

Primordial black holes in an accelerating universe

Physics Letters B, 2002
General expressions are given for the generation of Primordial Black Holes (PBH) in a universe with a presently accelerated expansion due to a(n effective) cosmological constant. We give expressions both for a powerlaw scalefree primordial spectrum and for spectra which are not of that type.
openaire   +3 more sources

Primordial black holes from Higgs vacuum instability: avoiding fine-tuning through an ultraviolet safe mechanism. [PDF]

Eur Phys J C Part Fields, 2018
Espinosa JR, Racco D, Riotto A.
europepmc   +1 more source

Perspectives on fundamental cosmology from Low Earth Orbit and the Moon. [PDF]

NPJ Microgravity, 2023
Bertone G, Buchmueller OL, Cole PS.
europepmc   +1 more source

Quantum-mechanical Suppression of Accretion by Primordial Black Holes

The Astrophysical Journal Letters
The Schwarzschild radii of primordial black holes (PBHs) in the mass range of 6 × 10 ^14 –4 × 10 ^19 g match the sizes of nuclei to atoms. I discuss the resulting quantum-mechanical suppression in the accretion of matter by PBHs in dense astrophysical ...
Abraham Loeb
doaj   +1 more source

Constraints on Tsallis Cosmology from Big Bang Nucleosynthesis and the Relic Abundance of Cold Dark Matter Particles. [PDF]

Entropy (Basel), 2023
Jizba P, Lambiase G.
europepmc   +1 more source

Exploring Primordial Curvature Perturbation on Small Scales with the Lensing Effect of Fast Radio Bursts

The Astrophysical Journal
Cosmological observations, e.g., cosmic microwave background, have precisely measured the spectrum of primordial curvature perturbation on larger scales, but smaller scales are still poorly constrained.
Huan Zhou, Zhengxiang Li, Zong-Hong Zhu
doaj   +1 more source

Entropy of the Universe and Hierarchical Dark Matter. [PDF]

Entropy (Basel), 2022
Frampton PH.
europepmc   +1 more source

Gravity and Cosmology in Kaniadakis Statistics: Current Status and Future Challenges. [PDF]

Entropy (Basel), 2022
Luciano GG.
europepmc   +1 more source

Black Holes as Laboratories: Tests of General Relativity. [PDF]

Gen Relativ Gravit
Gregory R, Nissanke S.
europepmc   +1 more source