First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA

NOvA is a long-baseline neutrino oscillation experiment that is designed to probe the neutrino mass hierarchy and mixing structure. It uses two functionally identical liquid scintillator detectors $14.6$mrad off-axis from the NuMI beamline at Fermilab, allowing a tightly focused neutrino flux peaked at around 2 GeV. The Near Detector is located 100m underground and is used to characterize the neutrino and anti-neutrino beams before oscillations. The Far Detector is placed at a distance of $810$ km from the beam source and is used to look for neutrino oscillations, primarily in the $\nu_{\mu}$ $\rightarrow$ $\nu_{\mu}$ and the $\nu_{\mu}$ $\rightarrow$ $\nu_{e}$ channels and their anti-neutrino counterparts. In this talk, I will present an overview of the latest results from the joint fit to the $\nu_{\mu}$ ($\bar{\nu}_{\mu}$)-disappearance and $\nu_{e}$ ($\bar{\nu}_{e}$)-appearance analyses, utilizing an accumulated exposure of $8.85\times10^{20}$ protons-on-target in the neutrino mode and $12.33\times10^{20}$ protons-on-target in the anti-neutrino mode. A particular highlight of these results is the observation of $\bar{\nu}_{e}$-appearance at a level of $4.4\sigma$