Results 91 to 100 of about 22,632 (204)
Big Bang Nucleosynthesis and the Lithium Problem
Journal of Physics: Conference Series, 2019 I briefly describe the cosmological lithium problems followed by a summary of our recent theoretical work on the magnitude of the effects of electron screening, the possible existence of dark matter parallel universes and the use of non-extensive ...
C. Bertulani
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Improved BBN constraints on the variation of the gravitational constant
European Physical Journal C: Particles and Fields, 2020 Big Bang Nucleosynthesis (BBN) is very sensitive to the cosmological expansion rate. If the gravitational constant G took a different value during the nucleosynthesis epoch than today, the primordial abundances of light elements would be affected.
James Alvey +3 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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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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86th Annual Meeting of the Meteoritical Society (2024)
Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley +1 more source
Generalized limits to the number of light particle degrees of freedom from big bang nucleosynthesis [PDF]
, 1999 Keith A. Olive, David D. Thomas
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Big-bang nucleosynthesis as a probe of the geometry of superspace [PDF]
, 1995 Alberto Llorente, Juan Pérez‐Mercader
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Updated Big Bang nucleosynthesis bounds on long-lived particles from dark sectors
Physics Letters BAs electromagnetic showers may alter the abundance of Helium, Lithium, and Deuterium, we can place severe constraints on the lifetime and amount of electromagnetic energy injected by long-lived particles.
J.R. Alves +7 more
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From deep earth to deep stars: A different nuclear reaction path to generate calcium in ancient stars. [PDF]
Innovation (Camb), 2023 Yan H, Shi J, Hou S.
europepmc +1 more source