Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 19: Beyond the Standard Model (Theorie) IV

T 19.3: Talk

Friday, April 1, 2011, 14:30–14:45, 30.23: 6-1

Discovering gravitino-stau scenarios at the LHC — •Jan Heisig and Jörn Kersten — University of Hamburg, II. Institute for Theoretical Physics, Hamburg, Germany

We present the phenomenology of the gravitino dark matter scenario at the large hadron collider (LHC) experiment. We consider the case that the next-to-lightest supersymmetric particle (NLSP) is the lighter stau. For a wide range of gravitino masses the lighter stau is stable on the scale of a detector. Such a particle will give rise to a prominent signature as a 'slow muon'. The dominant production channel of staus depends strongly on the hierarchy of the mass spectrum. However, the direct production (via the Drell-Yan process) is always present and independent of the remaining spectrum and thus sets a lower bound on the discovery potential of this scenario. In a careful analysis we show that this scenario will be found in the long-term LHC run for almost all reasonable assumptions for the mass spectrum including very high mass spectra as motivated from big bang nucleosynthesis (BBN) constraints.