Measuring Neutrino Oscillations in MINOS

The Main Injector Neutrino Oscillation Search (MINOS) is a two detector experiment in the NuMI muon neutrino beam. It is designed to measure muon neutrino disappearance after traveling 734km through the Earth. The survival probability of the oscillation hypothesis for neutrino disappearance is L/E dependent, so with a fixed L an energy-dependent muon neutrino disappearance measurement allows precision determination of neutrino oscillation parameters $\sin^{2} (2\theta_{23})$ and $\Delta m_{32}^{2}$. Other exotic disappearance hypotheses are also tested. We present techniques developed to improve our sensitivity compared to previous analyses. These include improving our beam extrapolation from the Near Detector to the Far Detector, the determination of backgrounds, and systematic uncertainties. We are also including information from additional datasets, such as anti-neutrino oscillations and muons from beam neutrino interactions in the rock upstream from the Far Detector. These techniques will be used to analyze data obtained from an accumulated $7.2\times 10^{20}$ protons on target, which is about twice the size of the previously analyzed dataset.