Recent Results of Electron-Neutrino Appearance Measurement at NOvA

TL;DR

NOvA's recent two-year analysis of electron-neutrino appearance enhances understanding of neutrino oscillations, aiming to resolve mass hierarchy and CP violation, with improved data and results over initial findings.

Contribution

This paper presents the second analysis of electron-neutrino appearance at NOvA, based on two years of data, advancing the experimental investigation of neutrino properties.

Findings

Evidence of $ u_e$ oscillation strengthened

Hints on neutrino mass hierarchy observed

Constraints on CP-violating phase improved

Abstract

NOvA is a long-baseline accelerator-based neutrino oscillation experiment that is optimized for $\nu_e$ measurements. It uses the upgraded NuMI beam from Fermilab and measures electron-neutrino appearance and muon-neutrino disappearance at its Far Detector in Ash River, Minnesota. The $\nu_e$ appearance analysis at NOvA aims to resolve the neutrino mass hierarchy problem and to constrain the CP-violating phase. The first measurement of electron-neutrino appearance in NOvA based on its first year's data was produced in 2015, providing solid evidence of $\nu_e$ oscillation with the NuMI beam line and some hints on mass-hierarchy and CP. This talk will discuss the second $\nu_e$ oscillation analysis at NOvA, which is based on 2 years of data.