Primordial Nucleosynthesis in the Next Millennium

Details Primordial Nucleosynthesis in the Next Millennium Primordial Nucleosynthesis in the Next Millennium

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nupha.621..505m&link_type=abstract

Nuclear Physics A, v. 621, p. 505-513.

Physics

Nuclear Physics

Scientific paper

Primordial nucleosynthesis is and shall continue to be a cornerstone of nuclear astrophysics and cosmology. It is the key probe of the early universe at times of order 1 to 104 sec. The power of big bang nucleosynthesis as a cosmological probe comes from the fact that much of the physics is accessible to terrestrial measurement. Nevertheless, uncertainties remain for many nuclear reactions and the field is currently limited by the quality of the primordial abundances inferred from observations. There is an urgent need, for more quantitative definitive observations of primordial abundances along with supporting theoretical investigations of chemical evolution, stellar processing, stellar model atmospheres, and recombination/collisional excitation rates so as to reduce the systematic uncertainties in the abundance constraints. There is also a need to better quantify the nuclear data. As the field now stands, alternative scenarios to the standard homogeneous big bang are not ruled out. This paper is a summary of what measurements and cosmological scenarios might be considered as we approach the next millennium.

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