Göttingen 2012 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 20: Astroteilchenphysik und Kosmologie (Theorie)

T 20.5: Vortrag

Montag, 27. Februar 2012, 17:45–18:00, VG 3.101

Impact of SUSY-QCD Corrections to Neutralino-Squark Coannihilation on the Dark Matter Relic Density — •Julia Harz1, Björn Herrmann2, Michael Klasen3, Karol Kovařík4, and Quentin Le Boulc’h51Deutsches 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

A powerful method to constrain the parameter space of theories beyond the Standard Model is to compare the predicted dark matter relic density with data from cosmological precision measurements, in particular from the WMAP satellite. On the particle physics side, the main uncertainty on the relic density arises from the (co-)annihilation cross sections of the dark matter particle. After a motivation for including higher order corrections in the prediction of the relic density, the project DM@NLO will be presented. This software package allows one to compute the neutralino (co-)annihilation cross sections including SUSY-QCD corrections at the one-loop level and to evaluate their effect on the relic density using a link to the public codes MicrOMEGAs and DarkSUSY. Recent results of the impact of SUSY-QCD corrections on the neutralino pair annihilation cross section will be discussed, and first results on neutralino-squark coannihilation will be shown.

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