Results 91 to 100 of about 21,366 (192)
Mirror matter can alleviate the cosmological lithium problem
, 2013 The abundance of lithium-7 confronts cosmology with a long lasting problem between the predictions of standard big bang nucleosynthesis and the baryonic density determined from the cosmic microwave background observations.
Coc, Alain +2 more
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Big Bang nucleosynthesis with a stiff fluid
, 2010 Models that lead to a cosmological stiff fluid component, with a density $\rho_S$ that scales as $a^{-6}$, where $a$ is the scale factor, have been proposed recently in a variety of contexts.
Dutta, Sourish, Scherrer, Robert J.
core +1 more source
EPJ Web of Conferences, 2018 We briefly describe the cosmological lithium problems followed by a summary of our recent theoretical work on the magnitude of the effects of electron screening, thepossible existence of dark matter parallel universes and the use of non-extensive (Tsal ...
Bertulani C.A. +2 more
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Nuclear physics and cosmology [PDF]
, 1989 Nuclear physics has provided one of two critical observational tests of all Big Bang cosmology, namely Big Bang Nucleosynthesis. Furthermore, this same nuclear physics input enables a prediction to be made about one of the most fundamental physics ...
Schramm, David N.
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θ-dependence of light nuclei and nucleosynthesis
Physical Review Research, 2020 We investigate the impact of the QCD vacuum at nonzero θ on the properties of light nuclei, Big Bang nucleosynthesis, and stellar nucleosynthesis. Our analysis starts with a calculation of the θ-dependence of the neutron-proton mass difference and ...
Dean Lee +4 more
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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
Dark Radiation Emerging After Big Bang Nucleosynthesis?
, 2011 We show how recent data from observations of the cosmic microwave background may suggest the presence of additional radiation density which appeared after big bang nucleosynthesis.
A. G. Doroshkevich +3 more
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Comment on "Measurement of $d + ^7$Be reaction rates for Big-Bang nucleosynthesis" [PDF]
, 2020 A. Coc, B. Davids
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THE BIG BANG MODEL: ITS ORIGIN AND DEVELOPMENT
Odessa Astronomical Publications, 2017 The current Big Bang Model had its origin in Einstein's attempt to model a static cosmos, based on his general theory of relativity. Friedmann and Lemaitre, as well as de Sitter, further developed the model to cover other options, including nonstatic ...
Ralph A Alpher
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, 2013 The production of the stable isotope Li-6 in standard Big Bang nucleosynthesis has recently attracted much interest. Recent observations in metal-poor stars suggest that a cosmological Li-6 plateau may exist.
A. Bellini +29 more
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