Kumaratunga, Sujeewa Terasita2010-05-262010-05-262008-02http://purl.umn.edu/90599University of Minnesota Ph.D. dissertation. February 2008. Major: Physics. Advisor: Keith Ruddick. 1 computer file (PDF); xv, 53 pages, appendices A-C. ill. (some col.)MINOS (Main Injector Neutrino Oscillation Search), is a long baseline neutrino experiment designed to search for neutrino oscillations using two detectors at Fermi National Accelerator Laboratory, IL (Near Detector) and Soudan, MN (Far Detector). It will study ν μ [arrow right] ν τ oscillations and make a measurement on the oscillation parameters, [Special characters omitted.] and [Special characters omitted.] , via a ν μ beam made at Fermilab. Charge current neutrino interactions in the MINOS detectors are of three types: quasi-elastic scattering (QEL), resonance scattering (RES) and deep inelastic scattering (DIS). Of these, quasi-elastic scattering leaves the cleanest signal with just one μ and one proton in the final state, thus rendering the reconstruction of the neutrino energy more accurate. This thesis will outline a method to separate QEL events from the others in the two detectors and perform a calculation of [Special characters omitted.] and [Special characters omitted.] using those events. The period under consideration was May 2005 to February 2006. The number of observed quasi-elastic events with energies below 10 GeV was 29, where the expected number was 60 ± 3. A fit to the energy distributions of these events gives [Special characters omitted.] and [Special characters omitted.] .en-USNeutrino oscillationsQuasielasticMINOSLong baselinePhysicsThesis or Dissertation