# 17th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2021)

26 August 2021 to 3 September 2021

## Studying dark matter with MadDM: Lines and loops

31 Aug 2021, 17:10
50m
Talk in parallel session Dark Matter and its detection

### Speaker

Daniele Massaro (Dipartimento di Fisica e Astronomia (DIFA), Alma Mater Studiorum - Università di Bologna; Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain)

### 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.

### Primary authors

Dr. Chiara Arina (Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain) Dr. Jan Heisig (Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University; Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain) Prof. Fabio Maltoni (Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain; Dipartimento di Fisica e Astronomia (DIFA), Alma Mater Studiorum - Università di Bologna) Daniele Massaro (Dipartimento di Fisica e Astronomia (DIFA), Alma Mater Studiorum - Università di Bologna; Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain) Dr. Olivier Mattelaer (Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain)

### Presentation Materials

 Massaro_TAUP_2021.pdf Studying dark matter with MadDM: Lines and loops | Massaro, D. | TAUP 2021
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