Non-standard interactions at NOvA

Non-standard interactions (NSI) are an extension of the neutrino matter effect leading to interesting phenomenology. NSI might also explain recent differences between NOvA and T2K oscillation results. We investigate the effects of the complex, off-diagonal, flavor-changing parameters $varepsilon_{emu}$, $varepsilon_{etau}$, and $varepsilon_{mutau}$, along with their corresponding CP-violating phases, $delta_{emu}$, $delta_{etau}$, and $delta_{mutau}$, respectively, as well as their correlation with the standard oscillation parameters $Delta m^2_{32}$, $sin^2theta_{23}$, and $delta_{CP}$. Many oscillation measurements are made in the presence of matter effects, and therefore include possible NSI effects. We discuss removing this bias by using reactor-only constraints on oscillation parameters to which NOvA is not sensitive. Additionally, NSI parameters are highly degenerate with other oscillation parameters, making fitting difficult. As such, we also discuss strategies which improve fits.