Possible solution to the 7Li problem by the long lived stau

Details Possible solution to the 7Li problem by the long lived stau Possible solution to the 7Li problem by the long lived stau

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1115..285j&link_type=abstract

THE DARK SIDE OF THE UNIVERSE: 4th International Workshop on the Dark Side of the Universe. AIP Conference Proceedings, Volume

Physics

Supersymmetry, Mesons, Big Bang Nucleosynthesis

Scientific paper

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 7Li between the observation and the prediction of the Big-Bang Nucleosynthesis by taking the mass of the neutralino as 300 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 7Li by these values of parameters. The lifetime of staus in this scenario is predicted to be O(100-1000) sec.

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