Joshua Spitz

The ArgoNeuT liquid argon time projection chamber’s (LArTPC) neutrino cross section measurements are depicted here in terms of the muon momentum (top) and angle (bottom). The neutrino almost never interacts with matter. “The Earth is just a silly ball / To them, through which they simply pass,” wrote John Updike in 1960. But how often do neutrinos actually hit the “silly ball”? And, what exactly happens when a neutrino does interact? A number of Fermilab-based experiments, including the ArgoNeuT liquid…