6533b7cefe1ef96bd1257a65

RESEARCH PRODUCT

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

Toshifumi JittohKazunori KohriMasato YamanakaMasafumi KoikeTakashi ShimomuraJoe Sato

subject

PhysicsNuclear and High Energy PhysicsParticle physicsAstrophysics (astro-ph)High Energy Physics::PhenomenologyDark matterFOS: Physical sciencesSupersymmetryAstrophysicsStandard ModelHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Big Bang nucleosynthesisNucleosynthesisNeutralinoAstrophysics::Solar and Stellar AstrophysicsHigh Energy Physics::ExperimentLight dark matterAstrophysics::Galaxy AstrophysicsMinimal Supersymmetric Standard Model

description

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 $O(100 -- 1000) sec$.

https://doi.org/10.1103/physrevd.78.055007