Searching for the Higgs Portal Scalar at ICARUS

The ICARUS detector is a liquid argon time projection chamber (LArTPC) acting as the far detector in the Short Baseline Neutrino program at Fermilab. Complementing its ability to better constrain neutrino physics, ICARUS is also sensitive to Beyond Standard Model searches. The Higgs Portal model, which introduces a dark scalar particle that mixes with the Higgs boson, is one such example. Uniquely positioned only 6 degrees off-axis from the 120~GeV Neutrinos at the Main Injector (NuMI) beam, ICARUS is sensitive to Higgs Portal Scalars originating from NuMI kaons and decaying to di-lepton pairs. This talk discusses progress towards the selection of electron/positron shower pairs produced from sub-210~MeV scalars within ICARUS, and strategies to distinguish this signal from cosmogenic and neutrino background. Upon completion, the analysis is expected to directly probe the Higgs Portal parameter space to lower mixing angles for ~40-210 MeV scalars than previous experimental results.