Light Dark World 2023

X-rays constraints on sub-GeV Dark Matter

Sep 20, 2023, 11:20 AM

10m

Nachrichtentechnik-Hörsaal (NTI) (KIT)

Speaker

Jordan Koechler (LPTHE - Sorbonne Université)

Description

In this talk, I will present updated constraints on 'light' dark matter (DM) particles with masses between 1 MeV and 5 GeV. In this range, we can expect DM-produced $e^{\pm }$ pairs to upscatter ambient photons in the Milky Way via Inverse Compton, and produce a flux of X-rays that can be probed by a range of space observatories. Using diffuse X-ray data from XMM-Newton, INTEGRAL, NuSTAR and Suzaku, we compute the strongest constraints to date on annihilating DM for 200 MeV < $m_{\mathrm{D}\mathrm{M}}$ < 5 GeV and decaying DM for 100 MeV < $m_{\mathrm{D}\mathrm{M}}$ < 5 GeV. I will also discuss possible future developments of these results and this technique.

Presentation materials

2023_LDW_Talk.pdf