Primordial Nucleosynthesis

Abstract

Primordial or big bang nucleosynthesis (BBN) is now a parameter free theory whose predictions are in good overall agreement with observations. However, the 7Li calculated abundance is significantly higher than the one deduced from spectroscopic observations. Most solutions to this lithium problem involve a source of extra neutrons that inevitably leads to an increase of the deuterium abundance. This seems now to be excluded by recent deuterium observations that have drastically reduced the uncertainty on D/H and also calls for improved precision on thermonuclear reaction rates.

Invited review at the 14th International Symposium on Nuclei in the Cosmos XIV (Niigata)

References in corpus (9)

• The Primordial Lithium Problem
• The effects of He I 10830 on helium abundance determinations
• Standard big bang nucleosynthesis and primordial CNO Abundances after Planck
• High-energy break-up of 6Li as a tool to study the Big-Bang nucleosynthesis reaction 2H(alpha,gamma)6Li
• A revised thermonuclear rate of ${}^7$Be($n$,$\alpha$)${}^4$He relevant to Big-Bang nucleosynthesis
• Modified big bang nucleosynthesis with non-standard neutron sources
• General limit on the relation between abundances of D and ${}^7$Li in big bang nucleosynthesis with nucleon injections
• Electron screening and its effects on Big-Bang nucleosynthesis
• Cosmological solutions to the Lithium problem: Big-bang nucleosynthesis with photon cooling, $X$-particle decay and a primordial magnetic field

Cited by in corpus (1)

• New determination of proton spectroscopic factors and reduced widths for ${}^8$Be states in the $16.5-18.0$ MeV excitation energy region via the study of the ${}^7$Li(${}^3$He,d)${}^8$Be transfer reaction at E${}_{lab}$ $=20$ MeV