Search for Higgs Boson Decays into a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math> Boson and a Light Hadronically Decaying Resonance Using 13 TeV <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math> Collision Data from the ATLAS Detector

A search for Higgs boson decays into a Zboson and a light resonance in two-lepton plus jet events is performed, using a ppcollision dataset with an integrated luminosity of 139\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}collected at \sqrt{s}=13\text{ }\text{ }\mathrm{TeV}by the ATLAS experiment at the CERN LHC. The resonance considered is a light boson with a mass below 4 GeV from a possible extended scalar sector or a charmonium...