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T: Fachverband Teilchenphysik

T 24: Theoretische Astroteilchenphysik und Kosmologie II

T 24.3: Vortrag

Donnerstag, 18. März 2010, 17:15–17:30, HG XV

Gravitino Dark Matter and General Neutralino NLSP — Laura Covi¹, •Jasper Hasenkamp^1,2, Stefan Pokorski³, and Jonathan Roberts⁴ — ¹Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — ²Institute for Theoretical Physics, Hamburg University, Hamburg, Germany — ³Institute of Theoretical Physics, Warsaw University, Warsaw, Poland — ⁴Center for Cosmology and Particle Physics, New York University, New York, U.S.A.

We study the scenario of gravitino dark matter with a general neutralino next-to-lightest supersymmetric particle (NLSP) in a model independent way. We consider all neutralino decay channels and compare them with the most recent Big Bang nucleosynthesis (BBN) constraints. We check how those bounds are relaxed for a Higgsino or a wino NLSP in comparison to the bino neutralino case and look for possible loopholes in the general parameter space of the Minimal Supersymmetric Standard Model (MSSM). We determine constraints on the gravitino and neutralino NLSP mass and comment on the possibility of detecting these scenarios at colliders.