Description
The FASER experiment detected, for the first time, neutrinos from pp collisions in the LHC. These neutrinos have energies between the most energetic neutrinos ever produced by human-made sources until now and high-energy cosmic neutrinos. This discovery opens a new window for studying TeV-energy neutrinos of all three flavors, as well as BSM and QCD physics. A liquid argon detector with high spatial and energy resolution in a wide energy range would allow for looking into the details of neutrino interactions and dark matter searches in the far forward direction of the LHC. However, designing such a detector presents many challenges, including muon backgrounds, requirements on the readout and trigger, and identification of tau neutrinos. A Preliminary examination of event rates and backgrounds suggests that a liquid argon detector is feasible and groundbreaking, with fruitful unexplored physics waiting to be discovered.
