# Recent results from DEAP-3600

## TL;DR

DEAP-3600, a large liquid argon dark matter detector, has achieved leading exclusion limits for various dark matter models, improved sensitivity through hardware upgrades and advanced analyses, and explored new theoretical frameworks and ultra-heavy dark matter candidates.

## Contribution

This paper reports on recent detector upgrades, new analysis techniques, and the first constraints on ultra-heavy dark matter, expanding the scope of dark matter searches with DEAP-3600.

## Key findings

- Set the world's best exclusion limit for xenon-phobic dark matter.
- Achieved sensitivity improvements via hardware upgrades and multivariate analyses.
- Provided new constraints on ultra-heavy, multi-scattering dark matter candidates.

## Abstract

DEAP-3600 is the largest running dark matter detector filled with liquid argon, set at SNOLAB, in Sudbury, Canada, 2 km underground. The experiment holds the most stringent exclusion limit in argon for WIMPs above 20 GeV/c$^2$. In the most recent published analysis, the background events due to alpha-induced scintillation in the neck of the detector limited the sensitivity. The sensitivity of the detector in the next WIMP search will be improved thanks to the decrease in backgrounds achieved by hardware upgrades and applying multivariate analyses. Moreover, the WIMP analysis has been revisited in terms of a non-relativistic effective field theory framework, and the impact of possible substructures in the galactic dark matter halo was explored. This analysis was motivated by the latest results from Gaia and the Sloan Sky Digital Survey. Here DEAP-3600 set the world's best exclusion limit for xenon-phobic dark matter scenarios. Finally, a custom-developed analysis has recently pointed out the extraordinary sensitivity to ultra-heavy, multi-scattering dark matter candidates, resulting in world-leading exclusion limits on two composite dark matter candidates up to Planck scale masses. These proceedings, after a quick overview of the dark matter detection in DEAP-3600, outline the detector upgrades and the dark matter search results from the collaboration of the last three years.