Big-bang nucleosynthesis and the relic abundance of dark matter in a stau-neutralino coannihilation scenario
| Autor: | Jittoh, Toshifumi, Kohri, Kazunori, Koike, Masafumi, Sato, Joe, Shimomura, Takashi, Yamanaka, Masato |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Phys.Rev.D78:055007,2008 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.78.055007 |
| Popis: | 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 $O(100 -- 1000) sec$. Comment: 9 pages, 2 figures |
| Databáze: | arXiv |
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