Energy Estimation for the NOvA 3 Flavor Neutrino Oscillation Analysis

NOvA is a long baseline neutrino experiment with a main goal of measuring neutrino oscillation parameters by observing electron neutrino appearance and muon neutrino disappearance. NOvA utilizes the NuMI beam located at Fermilab and two functionally identical detectors: a near detector at Fermilab, and a far detector 810 km away in Ash River, Minnesota. NOvA's detectors measure the electromagnetic and hadronic energy of neutrino events. Neutrino oscillations are a function of energy, so in order to make precise measurements of the oscillation parameters, NOvA must have robust energy estimation with good resolution to accurately resolve the neutrino energy spectra, for both electron and muon neutrinos. This talk will discuss the performance and new improvements of the energy estimators, including advances using machine learning techniques.