Description:

The JSNS2 experiment is able to measure mono-energetic (235.5 MeV) kaon decay-at-rest neutrino interactions within our detector with unprecedented clarity; using a dataset from our first year of running, we observe 621 interactions with an estimated signal-to-background rate of 3.3:1. And – because every neutrino has a known energy – our measurement of outgoing particles' total energy spectrum provides direct information about the nuclear effects involved within the interaction, allowing even the nuclear orbital shell of the struck nucleon to be inferred. Observing these nuclear effects, in turn, provides significant constraints on models of quasi-elastic neutrino-nucleus scattering, a crucial ingredient of many modern day neutrino experiments. Here I’ll present the details of our measurement and provide an outlook for future improvements.

Eric Marzec, Research Fellow, University of Michigan

Host: Susan Dittmer