Search for Dark Jets from a Higgs portal at the ATLAS experiment

Some theories built to explain the nature of Dark Matter hypothesise the existence of a sector of particles beyond the Standard Model, referred to as Dark Sector. In analogy with the Standard Model, Dark Quarks and Gluons would interact through a Dark QCD-like interaction with $ SU(N)$ symmetry. The communication between the Standard and the Dark Sector would be given by a portal, a particle field coupled to both sectors. At colliders, Dark Quarks could be produced through portals in hadronic or leptonic collisions, hence beginning partonic showers and hadronising into Dark Sector hadrons, forming Dark Jets. Depending on the lifetime and probability to decay into visible Standard Model particles, Dark Jets could produce Fully Invisible, Semi-Visible, Prompt or Emerging Jets final states. By now, Dark Jets coming from a scalar or vector portal have been searched for at the LHC. This proceeding reports a preliminary estimate of the exclusion reach of a search for Emerging Jets arising from a Higgs portal at the ATLAS experiment and a study on the identification of Emerging Jets through machine learning techniques.