Aug 23 – 28, 2010
Bonn
Europe/Berlin timezone

Sommerfeld and Sudakov corrections in heavy neutralino annihilation

Aug 26, 2010, 5:20 PM
15m
Hörsaal I (Bonn)

Hörsaal I

Bonn

Nussallee 12

Speaker

Mr Guillaume Chalons (LAPTH)

Description

We have computed the full one-loop corrections (electroweak as well as QCD) to processes contributing to the relic density of dark matter in the MSSM where the LSP is the lightest neutralino. We cover scenarios where the neutralino is a bino-higgsino one with mass around 500 GeV and an almost pure wino with a mass of order 2 TeV. In the wino case the radiative corrections exhibit important effects occurring in the non-relativistic regime as well as the ultra- relativistic one. This is due on the one hand to Sommerfeld Electroweak enhancement and on the other hand to Sudakov double logarithms corrections. The corrections can have a non- negligible impact on the predictions and should be taken into account in view of the present and forthcoming increasing precision on the relic density measurements. Our calculations are made with the help of SloopS , an automatic tool for the calculation of one-loop processes in the MSSM.

Primary author

Co-authors

Mr Fawzi Boudjema (LAPTH) Mr Hao Sun (LAPTH) Mr Nans Baro (ITP E RWTH Aachen University)

Presentation materials