Studying dark matter with MadDM: Lines and loops

31 Aug 2021, 17:10
50m
Talk in parallel session Dark Matter and its detection Discussion Panel Dark Matter 5

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

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×