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T: Fachverband Teilchenphysik

T 111: Theoretische Astroteilchenphysik und Kosmologie

T 111.7: Talk

Thursday, March 27, 2014, 18:15–18:30, P101

Gaugino annihilation and co-annihilation into light and heavy quarks — Björn Herrmann¹, Michael Klasen², Karol Kovarik², Moritz Meinecke², and •Patrick Steppeler² — ¹LAPTh, Université de Savoie/CNRS, 9 Chemin de Bellevue, B.P. 110, F-74941 Annecy-le-Vieux, France — ²Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 9, D-48149 Münster, Germany

We present the full O(α_s) supersymmetric QCD corrections for gaugino annihilation and co-annihilation into light and heavy quarks in the Minimal Supersymmetric Standard Model (MSSM). We demonstrate that these channels are phenomenologically relevant within the so-called phenomenological MSSM. Numerical results for the (co-)annihilation cross sections and the predicted neutralino relic density are presented. We show that the impact of including the corrections on the cosmologically preferred region of parameter space is larger than the current experimental uncertainty from PLANCK data.