PMID: 11607387Jun 1, 1993Paper

Cosmological implications of light element abundances: theory

Proceedings of the National Academy of Sciences of the United States of America
D N Schramm

Abstract

Primordial nucleosynthesis provides (with the microwave background radiation) one of the two quantitative experimental tests of the hot Big Bang cosmological model (versus alternative explanations for the observed Hubble expansion). The standard homogeneous-isotropic calculation fits the light element abundances ranging from 1H at 76% and 4He at 24% by mass through 2H and 3He at parts in 105 down to 7Li at parts in 1010. It is also noted how the recent Large Electron Positron Collider (and Stanford Linear Collider) results on the number of neutrinos (Nnu) are a positive laboratory test of this standard Big Bang scenario. The possible alternate scenario of quark-hadron-induced inhomogeneities is also discussed. It is shown that when this alternative scenario is made to fit the observed abundances accurately, the resulting conclusions on the baryonic density relative to the critical density (Omegab) remain approximately the same as in the standard homogeneous case, thus adding to the robustness of the standard model and the conclusion that Omegab approximately 0.06. This latter point is the driving force behind the need for nonbaryonic dark matter (assuming total density Omegatotal = 1) and the need for dark baryonic matter, sinc...Continue Reading

References

Nov 19, 1971·Nature·K A Smith, P D Robertson
May 23, 1970·Nature·H ReevesF Hoyle

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Citations

Jun 1, 1993·Proceedings of the National Academy of Sciences of the United States of America·G Steigman
Jun 1, 1993·Proceedings of the National Academy of Sciences of the United States of America·V C Rubin
Jun 1, 1993·Proceedings of the National Academy of Sciences of the United States of America·M S Turner

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