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

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

2008-05-22

arxiv.org/abs/0805.3389v2

Phys.Rev.D78:055007,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 2 figures

Scientific paper

10.1103/PhysRevD.78.055007

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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