Big Bang Nucleosynthesis of ^6Li and ^7Li

Details Big Bang Nucleosynthesis of ^6Li and ^7Li Big Bang Nucleosynthesis of ^6Li and ^7Li

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..dnp.be003m&link_type=abstract

American Physical Society, 2007 Annual Meeting of the Division of Nuclear Physics, October 10-13,2007, abstract #BE.003

Physics

Nuclear Physics

Scientific paper

The ^6Li abundance observed in metal poor halo stars exhibits a plateau similar to that for ^7Li suggesting a primordial origin. However, the observed abundance of ^6Li is a factor of 10^3 larger and that of ^7Li is a factor of 3 lower than the abundances predicted in the standard big bang when the baryon-to-photon ratio is fixed by WMAP. Here we show that both of these abundance anomalies can be explained by the existence of a long-lived massive, negatively-charged leptonic particle during nucleosynthesis. Such particles would capture onto the newly synthesized nuclei thereby reducing the reaction Coulomb barriers and opening new transfer reaction possibilities, which catalyze a second round of big bang nucleosynthesis. This novel solution to both of the Li problems can be achieved with or without the additional effects of stellar destruction.

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