TY - GEN AU - Aad, G. AU - Aguilar Saavedra, Juan Antonio AU - Atlas Collaboration PY - 2021 UR - http://hdl.handle.net/10481/71155 AB - This paper presents a search for dark matter in the context of a two-Higgs-doublet model together with an additional pseudoscalar mediator, a, which decays into the dark-matter particles. Processes where the pseudoscalar mediator is produced in... LA - eng PB - Springer TI - Search for dark matter produced in association with a single top quark in √ s = 13 TeV pp collisions with the ATLAS detector DO - 10.1140/epjc/s10052-021-09566-y ER -