Search for Light Dark Matter at the ICARUS T-600 Detector with the NuMI Beam: Status of Simulation Studies.

The ICARUS T-600 detector is a Liquid Argon Time Projection Chamber (LArTPC) that is capable of 3D reconstruction of particle tracks with a O(1 mm) resolution and particle energy reconstruction with a threshold of 200 MeV inside the active volume. It is presently installed on the surface at Fermilab as part of the Short Baseline Neutrino Program, exposed on-axis to the Booster Neutrino Beam (BNB) and 6 degrees off axis to the Neutrinos from the Main Injector (NuMI) beam. As theoretical studies on light dark matter (LDM) resulting from mesons coming from beam-target experiments show, there is a maximum LDM to neutrino background ratio at around 6 degrees off-axis. Experimental studies of LDM resulting from the processes pion$^{\mathrm{0}}$(eta$^{\mathrm{0}})$ to photon $+$ dark photon to photon $+$ DM pair \begin{figure}[htbp] \centerline{\includegraphics[width=1.44in,height=0.17in]{080120211.eps}} \label{fig1} \end{figure} at the ICARUS detector are highly favored. Here I will present the expected sensitivities for such searches for various LDM parameter sets on the process DM $+$ electron to DM $+$ electron, using a full simulation chain, consisting of a custom DM flux generator, GENIE's LDM-e$^{\mathrm{-}}$ interaction simulator, and ICARUS's LArSoft detector simulation code.