Search for Dark Matter Produced in Association with a Dark Higgs Boson Decaying into W^{±}W^{∓} or ZZ in Fully Hadronic Final States from sqrt[s]=13 TeV pp Collisions Recorded with the ATLAS Detector
Phys Rev Lett. 2021 Mar 26;126(12):121802.
doi: 10.1103/PhysRevLett.126.121802.