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Residual late-time dark matter particle annihilations during and after BigBang Nucleosynthesis (BBN) may alter the predicted cosmological abundances ofthe light elements. Within the constrained minimal supersymmetric extension ofthe Standard Model (the CMSSM) with a neutralino LSP, we find negligibleeffects on the abundances of Deuterium, He3, He4 and Li7 predicted byhomogeneous BBN, but potentially a large enhancement in the predicted abundanceof Li6. This enhancement may be as much as two orders of magnitude in thefocus-point WMAP strip and in the coannihilation and funnel regions for largetan beta for small m_{1/2}, and the effect is still significant at largem_{1/2}. However, the potential Li6 enhancement is negligible in the part ofthe coannihilation strip for tan beta = 10 that survives the latest LHCconstraints. A similar enhancement of the \li6 abundance may also be found in amodel with common, non-universal Higgs masses (the NUHM1).

An Enhanced Cosmological Li6 Abundance as a Potential Signature of Residual Dark Matter Annihilations