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

26 August 2021 to 3 September 2021

## New Constraints on Strongly Interacting Sub-GeV Dark Matter via Electron Scattering from a small Dual-Phase Xenon TPC

30 Aug 2021, 18:00
1h 30m
Poster Dark Matter and its detection

### Speaker

Simon Buse (University of Zurich)

### Description

We report new results on interactions of sub-GeV dark matter particles with electrons using data from a small dual-phase xenon time projection chamber operated at the Earth's surface 1. We consider scattering both on electrons and nuclei in the Earth’s crust, atmosphere, and shielding materials to compute the attenuation of the dark matter flux by the atmosphere and the 2. With an exposure of $\sim15\,\mathrm{g}\,\mathrm{days}$ and based on an ionisation-only event selection and no background subtraction, we evaluate the data in terms of various models, including interactions mediated by a heavy and ultralight dark photon as well as through an electric dipole moment 3. For the case of a heavy dark photon mediator, we exclude new parameter space for dark matter particle masses in the range $100-400\,\mathrm{MeV}$.

### Primary authors

Simon Buse (University of Zurich) Patricia Sanchez-Lucas (University of Zurich) Prof. Laura Baudis (University of Zurich)

### Presentation Materials

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