Mainz 2014 – scientific programme
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T: Fachverband Teilchenphysik
T 53: Jenseits des Standardmodells (Theorie) 1
T 53.7: Talk
Tuesday, March 25, 2014, 18:15–18:30, P6
Sommerfeld enhancement and relic abundance of neutralino dark matter - a survey of the MSSM parameter space — Martin Beneke1, •Charlotte Hellmann1, and Pedro Ruiz Femenia2 — 1TU Muenchen — 2IFIC Valencia
We discuss the calculation of Sommerfeld enhanced (co-) annihilation cross sections of nearly mass degenerate non-relativistic neutralinos and charginos in the MSSM including P- and O(v2) S-wave annihilations. Our approach consistently takes off-diagonal annihilation rates into account and allows to keep small mass-differences between the nearly mass-degenerate neutralinos and charginos. The (co-) annihilation cross sections are a central ingredient in the neutralino dark matter relic abundance calculation for TeV scale neutralino LSP dark matter. To investigate the impact of the enhanced cross sections on the predicted neutralino relic abundance we identify interesting regions of parameter space. We discuss the different features of these regions, focusing in particular on heavy wino and Higgsino dark matter and models interpolating in between the two scenarios.