First Oscillation Results for the T2K Experiment

Kavli Affiliate: Mark Hartz
| Summary:
T2K is a long baseline high intensity neutrino oscillation experiment employing an off-axis design to search for the as yet unobserved appearance of ν_e neutrinos in a ν_μ beam. The neutrino beam originates at the J-PARC facility in Tokai, Japan and the Super-Kamiokande (SK) detector, located 295 km away, measures the composition of the oscillated beam. The SK data are searched for an excess of ν_e, constraining the allowed parameter space of sin^2(2θ_13), the parameter governing the amplitude of oscillations from ν_μ to ν_e. This amplitude is of particular interest since it also modulates the amplitude of CP violating terms in the lepton mixing matrix. This paper presents results from the first T2K physics run in 2010 with 3.23times10^19 protons on target.
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