Speaker
Description
Low-energy charged-current scattering of electron neutrinos on argon is the dominant interaction channel for observing neutrinos from supernovae with DUNE. It has been demonstrated that the theoretical uncertainty on the cross section in this unobserved energy region imparts significant bias on supernova spectral parameter reconstruction. COHERENT operated COH-Ar-10, a 24 kg single-phase liquid argon scintillation detector, at the Spallation Neutron Source at Oak Ridge National Laboratory, obtaining multiple years of exposure from the stopped pion source. In addition to its designed sensitivity to low-energy coherent neutrino-nucleus scattering, COH-Ar-10 was sensitive to the higher energy charged-current scattering as well as other MeV-scale physics such as accelerator produced axions. This poster will discuss the tens-of-MeV high-energy analysis for the entire exposure of COH-Ar-10.