Studying dark matter with MadDM: Lines and loops

12 Jul 2021, 14:45
15m
Track D (Zoom)

Track D

Zoom

talk Dark Matter Dark Matter

Speaker

Mr Daniele Massaro (Università di Bologna)

Description

Automated tools for the computation of amplitudes and cross sections have become the backbone of phenomenological studies beyond the standard model. We present the latest developments in MadDM, a calculator of dark matter observables based on MadGraph5_aMC@NLO. The new version enables the fully automated computation of loop-induced annihilation processes, relevant for indirect detection of dark matter. Of particular interest is the electroweak annihilation into $\gamma X$, where $X=\gamma$, $Z$, $h$ or any new unstable particle even under the dark symmetry. These processes lead to the sharp spectral feature of monochromatic gamma lines: a smoking-gun signature for dark matter annihilation in our Galaxy. MadDM provides the predictions for the respective fluxes near Earth and derives constraints from the $\gamma$-ray line searches by Fermi-LAT and HESS. As an application, we present the implications for the parameter space of the Inert Doublet model and a top-philic $t$-channel mediator model.

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Primary authors

Chiara Arina (CP3 UCLouvain) Mr Daniele Massaro (Università di Bologna) Fabio Maltoni (Universite Catholique de Louvain (UCL) (BE) and Università di Bologna) Jan Heisig (Université catholique de Louvain (UCL)) Olivier Mattelaer (UCLouvain)

Presentation materials