Speaker
Description
Darkside-20k is a direct dark matter detection experiment situated at LNGS, Italy, featuring a dual-phase liquid argon TPC with an active target mass of 50 tonnes. Due to the zero nuclear spin of argon, liquid argon detector data is typically interpreted only in terms of spin-independent dark matter interactions. However, in the non-relativistic effective field theory (NREFT) framework, liquid argon detector data does have sensitivity to spin-dependent interactions. We present a scan over the NREFT parameter space, considering all isospin-conserving couplings of dark matter to protons and neutrons in liquid argon in the DarkSide-50 data set, and produce sensitivity projections for DarkSide-20k. The results demonstrate that, contrary to previous expectations, large liquid argon detectors such as DarkSide-20k can indeed probe spin dependant dark matter models.