Göttingen 2012 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 15: Beyond the Standard Model (Theorie) 1

T 15.7: Vortrag

Montag, 27. Februar 2012, 18:15–18:30, VG 3.102

Long-lived staus in a simplified model approach at the LHC — •Jan Heisig, Joern Kersten, and Boris Panes — II. Institute for Theoretical Physics, University of Hamburg, Germany

We present the phenomenology of the gravitino dark matter scenario at the LHC. 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, due to the directly detectable stau one is not forced to rely solely on the observation of highly energetic standard model (SM) particles coming either from decay chains or from initial state radiation. This is why in a long-lived stau scenario there are fewer regions in parameter space where the theory is hidden from observation, compared to the neutralino LSP scenario where compressed spectra as well as highly stretched spectra effectively hide from observation. We study the LHC sensitivity and examine its dependence on the spectrum with an emphasis on the strong production and decay. Unlike most existing studies we don't restrict ourselves to specific supersymmetry breaking models and benchmark points but aim for a model-independent analysis along the lines of the so-called simplified models.