Bonn 2010 – wissenschaftliches Programm
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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 Hasenkamp1,2, 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.