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arXiv · 0805.3389

Big-bang nucleosynthesis and the relic abundance of dark matter in a stau-neutralino coannihilation scenario

Toshifumi Jittoh·Kazunori Kohri·Masafumi Koike·Joe Sato·Takashi Shimomura·Masato Yamanaka
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Abstract

A scenario of the Big-Bang Nucleosynthesis is analyzed within the Minimal Supersymmetric Standard Model which is consistent with a stau-neutralino coannihilation scenario to explain the relic abundance of dark matter. We find that we can account for the possible descrepancy of the abundance of $\mathrm{^{7}Li}$ between the observation and the prediction of the Big-Bang Nucleosynthesis by taking the mass of the neutralino as $300 \mathrm{GeV}$ and the mass difference between the stau and the neutralino as $(100 -- 120) MeV$. We can therefore simultaneously explain the abundance of the dark matter and that of $\mathrm{^{7}Li}$ by these values of parameters. The lifetime of staus in this scenario is predicted to be $O(100 -- 1000) sec$.

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Toshifumi Jittoh, Kazunori Kohri, Masafumi Koike, Joe Sato, Takashi Shimomura, Masato Yamanaka. 2008-10-15. Big-bang nucleosynthesis and the relic abundance of dark matter in a stau-neutralino coannihilation scenario. https://doi.org/10.1103/physrevd.78.055007

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