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• W2133118636 abstract "It has been proposed that the apparent discrepancies between the inferred primordial abundances of $^{6}mathrm{Li}$ and $^{7}mathrm{Li}$ and the predictions of big bang nucleosynthesis (BBN) can be resolved by the existence of a negatively charged massive unstable supersymmetric particle (${X}^{ensuremath{-}}$) during the BBN epoch. Here, we present new BBN calculations with an ${X}^{ensuremath{-}}$ particle utilizing an improved nuclear reaction network including captures of nuclei by the particle, nuclear reactions and $ensuremath{beta}$ decays of normal nuclei and nuclei bound to the ${X}^{ensuremath{-}}$ particles ($X$ nuclei), and new reaction rates derived from recent rigorous quantum many-body dynamical calculations. We find that this is still a viable model to explain the observed $^{6}mathrm{Li}$ and $^{7}mathrm{Li}$ abundances. We also show that with the new rates the production of heavier nuclei is suppressed and there is no signature on abundances of nuclei heavier than Be in the ${X}^{ensuremath{-}}$-particle catalyzed BBN model as has been previously proposed. We also consider the version of this model whereby the ${X}^{ensuremath{-}}$ particle decays into the present cold dark matter. We analyze this paradigm in light of the recent constraints on the dark-matter mass deduced from the possible detected events in the CDMS-II experiment. We conclude that based upon the inferred range for the dark-matter mass, only ${X}^{ensuremath{-}}$ decay via the weak interaction can achieve the desired $^{7}mathrm{Li}$ destruction while also reproducing the observed $^{6}mathrm{Li}$ abundance." @default.
• W2133118636 created "2016-06-24" @default.
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• W2133118636 date "2010-04-16" @default.
• W2133118636 modified "2023-09-30" @default.
• W2133118636 title "New results on catalyzed big bang nucleosynthesis with a long-lived negatively charged massive particle" @default.
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• W2133118636 doi "https://doi.org/10.1103/physrevd.81.083521" @default.
• W2133118636 hasPublicationYear "2010" @default.
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