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 103 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 synthesized nuclei thereby reducing the reaction Coulomb
barriers and opening new transfer reaction possibilities, and catalyzing 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.Comment: 6 pages, 2 figures, to be published in Physical Review