Search for dark matter produced in association with a hadronically decaying vector boson in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector at the LHC

This note describes a search for dark matter produced in association with a hadronically-decaying $W$ or $Z$ boson using 3.2~fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. The topology of this search is a boosted boson recoiling against pair-produced dark matter particles, producing a large-radius jet and missing transverse momentum. No statistically significant excess over the Standard Model prediction is observed. The search results are interpreted in terms of both an effective field theory and a simplified model containing dark matter.