The relic density of heavy neutralinos

25 Aug 2015, 16:55
20m
Bay ()

Bay

Particle Cosmology Theory and Experiment Particle Cosmology

Speakers

Aoife BHARUCHA (Université d'Aix-Marseille) Francesco Dighera (TU Munich)

Description

We will discuss the relic density of TeV-scale wino-like neutralino dark matter in the pMSSM. We have recently developed a framework enabling us to calculate the Sommerfeld enhanced relic density in general pMSSM scenarios. We will present the results of a thorough investigation of certain regions of parameter space, focussing in particular on departures from the well known pure wino scenario: namely the effect of sfermion masses being non-decoupled and of allowing non-negligible higgsino or bino components in the lightest neutralino. The results reveal a number of phenomenologically interesting but so far unexplored regions of parameter space. Near the region where the Sommerfeld enhancement is resonant, the combined effect of non-decoupled sfermions and significant higgsino-wino mixing allows regions with both the correct relic density and the potential for sizeable indirect detection rates.

Primary authors

Andrzej Hryczuk (TU Munich) Aoife BHARUCHA (Université d'Aix-Marseille) Francesco Dighera (TU Munich) Martin Beneke (Rheinisch-Westfaelische Tech. Hoch. (DE)) Pedro Ruiz-Femenia (TU Munich)

Presentation Materials