Dresden 2013 – scientific programme
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T: Fachverband Teilchenphysik
T 17: Beyond the Standard Model (Theorie) 4
T 17.8: Talk
Wednesday, March 6, 2013, 18:30–18:45, WIL-A124
SUSY-QCD corrections to (co)annihilation and their impact on the relic density — •Julia Harz1, Björn Herrmann2, Michael Klasen3, Karol Kovařik4, and Quentin Le Boulc’h5 — 1Deutsches Elektronen-Synchrotron, Hamburg, Germany — 2Laboratoire d’Annecy de Physique Théorique, Annecy-le-Vieux, France — 3Institute for Theoretical Physics, University of Münster, Germany — 4Karlsruhe Institute of Technology, Karlsruhe, Germany — 5Laboratoire de Physique Subatomique et de Cosmologie, Grenoble, France
We computed the full O(αs) supersymmetric QCD corrections for neutralino-stop co-annihilation in the Minimal Supersymmetric Standard Model (MSSM). It will be shown that these annihilation channels are phenomenologically relevant within the so-called phenomenological MSSM, in particular in the light of the observation of a Higgs-like particle with a mass of about 126 GeV at the LHC. Numerical results for the co-annihilation cross sections and the predicted neutralino relic density are presented. It will be demonstrated that the impact of including these corrections on the cosmologically preferred region of parameter space is larger than the current experimental uncertainty from WMAP data.