Results 101 to 110 of about 20,829 (241)
Lithium and Big-Bang Nucleosynthesis [PDF]
Proceedings of the International Astronomical Union, 2005 Since the discovery of the “Spite plateau” in 1982, lithium observations in halo stars have been used to deduce the primordial discrepancy.
A. Coc, Elisabeth Vangioni
openaire +2 more sources
Sharpening the Predictions of Big-Bang Nucleosynthesis
Physical Review Letters, 1999 5 pages, 4 figures (epsfig), REVTeX; submitted to Phys.
James W. Truran +4 more
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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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On the Galactic Evolution of $D$ and $^3He$
, 1993 The determined abundances of primordial $^4He$ and $^7Li$ provide a basis with which to test the standard model of big bang nucleosynthesis in conjunction with the other two light element isotopes $D$ and $^3He$, also produced in the big bang.
Olive, Keith A. +2 more
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Electron screening and its effects on Big-Bang nucleosynthesis
, 2010 We study the effects of electron screening on nuclear reaction rates occurring during the Big Bang nucleosynthesis epoch. The sensitivity of the predicted elemental abundances on electron screening is studied in details.
A. B. Balantekin +4 more
core +1 more source
Bounds on variations of the strange quark mass from Big Bang nucleosynthesis
Journal of High Energy PhysicsWe analyze the effect of a variation of the strange nucleon matrix element N m s s ¯ s N $$ \left\langle N|{m}_s\overline{s}s|N\right\rangle $$ on the abundances of the light elements produced in the Big Bang.
Ulf-G. Meißner +2 more
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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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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
Big-bang nucleosynthesis revisited [PDF]
The homogeneous big-bang nucleosynthesis yields of D, He-3, He-4, and Li-7 are computed taking into account recent measurements of the neutron mean-life as well as updates of several nuclear reaction rates which primarily affect the production of Li-7 ...
Olive, Keith A. +3 more
core +1 more source
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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