1992/06/18 by David Thomas, David N. Schramm, Keith A. Olive +1 · 7 citations
Physics and Astronomy · #Abundance (ecology) #Beryllium #Big Bang nucleosynthesis #Boron #Nuclear physics research studies #Nuclear reaction #Nucleosynthesis #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Stars #Stellar nucleosynthesis #astro-ph
paper · pdf · doi:10.1086/172469
published as Astrophys.J.406:569-579,1993 · Plain TeX, 28 pages, 8 figures (not included, but available from authors). UMN-TH-1020/92
arxiv created 1992/06/18 · openalex publication_date 1993/04/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The ability to now make measurements of Be and B as well as put constraints on \lisix abundances in metal-poor stars has led to a detailed reexamination of Big Bang Nucleosynthesis in the A\groughly6 regime. The nuclear reaction network has been significantly expanded with many new rates added. It is demonstrated that although a number of A>7 reaction rates are poorly determined, even with extreme values chosen, the standard homogeneous model is unable to produce significant yields (Be/H and B/H <10-17 when A≤7 abundances fit) above A=7 and the \liseven/\lisix ratio always exceeds 500. We also preliminarily explore inhomogeneous models, such as those inspired by a first order quark-hadron phase transition, where regions with high neutron/proton ratios can allow some leakage up to A>7. However models that fit the A≤7 abundances still seem to have difficulty in obtaining significant A>7 yields.