Results 11 to 20 of about 20,829 (241)
Neutrinos And Big Bang Nucleosynthesis [PDF]
Physica Scripta, 2005 The early universe provides a unique laboratory for probing the frontiers of particle physics in general and neutrino physics in particular. The primordial abundances of the relic nuclei produced during the first few minutes of the evolution of the ...
Bonifacio P +8 more
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Big bang nucleosynthesis [PDF]
Nuclear Physics B - Proceedings Supplements, 2000 The concordance of standard big bang nucleosynthesis theory and the related observations of the light element isotopes (including some new higher \he4 abundances) will be reviewed. Implications of BBN on chemical evolution, dark matter and constraints on particle properties will be discussed.
Keith A. Olive
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The Deuteron Confronts Big Bang Nucleosynthesis [PDF]
Nuclear Physics B - Proceedings Supplements, 1996 Recent determinations of the deuterium abundance, $^2$H/H, in high redshift Lyman limit hydrogen clouds challenge the usual picture of primordial nucleosynthesis based on \lq\lq concordance\rq\rq\ of the calculated light element ($^2$H, $^3$He, $^4$He, $^
Alcock +35 more
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Big Bang Nucleosynthesis in Crisis? [PDF]
Physical Review Letters, 1995 To be published in Phys. Rev. Lett. Revised version to reflect referee comments and criticisms by Copi, Schramm, and Turner of robustness of D/He-3 analysis. Small quantitative changes but qualitative conclusions unchanged. Question mark added to title.
Naoya Hata +6 more
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Big Bang Nucleosynthesis [PDF]
Nuclear Physics B - Proceedings Supplements, 2002 A review of Big Bang Nucleosynthesis (BBN) is presented. Observations of deuterium and helium-4 are discussed. Some BBN restrictions on non-standard physics, especially on neutrino properties and time-variation of fundamental constants are given.
A. D. Dolgov
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Revised Uncertainties in Big Bang Nucleosynthesis [PDF]
International Journal of Modern Physics E, 2017 Big Bang Nucleosynthesis (BBN) explores the first few minutes of nuclei formation after the Big Bang. We present updates that result in new constraints at the 2{\sigma} level for the abundances of the four primary light nuclides - D,3He,4He, and 7Li - in
Foley, Michael +3 more
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Assessing Big-Bang Nucleosynthesis
Physical Review Letters, 1995 Systematic uncertainties in the light-element abundances and their evolution make a rigorous statistical assessment difficult. However, using Bayesian methods we show that the following statement is robust: the predicted and measured abundances are consistent with 95\% credibility only if the baryon-to-photon ratio is between $2\times 10^{-10}$ and $6 ...
Craig J. Copi +2 more
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Primordial Lithium and Big Bang Nucleosynthesis [PDF]
The Astrophysical Journal, 2000 11 pages, latex, 2 ps ...
Sean G. Ryan +4 more
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Big-bang nucleosynthesis [PDF]
Nuclear Physics A, 2006 Abstract We present an overview of the standard model of big bang nucleosynthesis (BBN), which describes the production of the light elements in the early universe. The theoretical prediction for the abundances of D, 3He, 4He, and 7Li is discussed.
Coc, A
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Big Bang Nucleosynthesis Calculation [PDF]
, 2002 I review standard big bang nucleosynthesis and some versions of nonstandard BBN. The abundances of the primordial isotopes D, He-3, and Li-7 produced in standard BBN can be calculated as a function of the baryon density with an accuracy of about 10%. For He-4 the accuracy is better than 1%. The calculated abundances agree fairly well with observations,
H. Kurki‐Suonio
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