Hammer events, neutrino energies, and nucleon-nucleon correlations

Understand

Neutrino oscillation measurements depend on a difference between the rate of neutrino-nucleus interactions at different neutrino energies or different distances from the source.

• Knowledge of the neutrino energy spectrum and neutrino-detector interactions are crucial for these experiments.
• Short range nucleon-nucleon correlations in nuclei (SRC) affect properties of nuclei.
• The ArgoNeut liquid Argon Time Projection Chamber (lArTPC) observed neutrino-argon scattering events with two protons back-to-back in the final state ("hammer" events) which they associated with SRC pairs.