2010/08/27 by Gary Steigman, Steigman, Gary · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Nuclear Theory (nucl-th) #astro-ph.CO #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.1008.4765
11 pages, 6 figures, Revised version to appear in the Proceedings of the 11th Symposium on Nuclei in the Cosmos (NIC XI), to be published by Proceedings of Science (PoS, SISSA)
openalex publication_date 2010/08/27 · arxiv created 2010/09/24 · arxiv updated 2010/09/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
For a brief time in its early evolution the Universe was a cosmic nuclear reactor. The expansion and cooling of the Universe limited this epoch to the first few minutes, allowing time for the synthesis in astrophysically interesting abundances of only the lightest nuclides (D, 3He, 4He, 7Li). For big bang nucleosynthesis (BBN) in the standard models of cosmology and particle physics (SBBN), the SBBN-predicted abundances depend on only one adjustable parameter, the baryon density parameter (the ratio by number of baryons (nucleons) to photons). The predicted and observed abundances of the relic light elements are reviewed, testing the internal consistency of primordial nucleosynthesis. The consistency of BBN is also explored by comparing the values of the cosmological parameters inferred from primordial nucleosynthesis for the standard model and for models with non-standard early Universe expansion rates with those determined from studies of the cosmic background radiation, which provides a snapshot of the Universe some 400 thousand years after BBN ended.