Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 111: Theoretische Astroteilchenphysik und Kosmologie

T 111.5: Talk

Thursday, March 27, 2014, 17:45–18:00, P101

Constraints on internal bremsstrahlung in leptophilic dark matter models — •Juri Smirnov, Jochim Kopp, and Lisa Michaels — Max Planck Institut für Kernphysik

Due to technological advances of the last years the search for peaked gamma ray signals has become one of the most promising methods for Dark Matter search. Among the models proposed, those with a prominent gamma ray signal involving virtual internal bremsstrahlung have attracted a lot of interest recently. While the scenarios with Dark Matter coupling to quarks have been studied and constrained by several groups the leptophilic scenario is believed to be nearly unconstrained by direct detection experiments so far. We show in this paper that despite the fact that there is no direct Dark Matter nucleon coupling on tree level, at the one loop level an electromagnetic interaction occurs, which increases at the resonant point of the virtual internal bremsstrahlung process. This allows us to put new limits on this class of Dark Matter models. We investigate furthermore, several constraints from high precision experiments on the leptophilic DM scenario. To this end we calculate the expected effects on lepton flavour violation, Di-Lepton systems and anomalous magnetic moments.