20-24 May 2013
Europe/Berlin timezone
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Bonn - Small Lecture Hall Mathematics

Naturalness of Light Neutralino Dark Matter


  • Yasutaka TAKANISHI


We (P. Grothaus, M. Lindner, Y. T.) investigate neutralino dark matter in the low-energy phenomenological minimal supersymmetric standard model taking account of the newest results from the Large Hadron Collider as well as all other experimental bounds from collider physics and the cosmological abundance. We find that near updates of direct searches signi cantly rule out a large area of the parameter space, but will not rise the minimal value of fine-tuning. There is a band at small neutralino masses, where the fine-tuning stays low even for cross-sections of about 10^{-16} pb.