Physics Goals
The goal of the T2K experiment is to gain a more complete understanding of neutrino oscillation parameters. Previous neutrino experiments have observed the disappearance of muon neutrinos in a beam as they oscillate to tau neutrinos, but oscillation from ν
μ to ν
e has not been observed. The reason for this is that the mixing angle θ13, that controls the probability for this oscillation, is very small. T2K hopes to be the first experiment to measure the appearance of electron neutrinos in a muon neutrino beam. T2K's ND280 detector will take data on neutrino interaction cross section measurements on water. Precise measurements of the other neutrino mixing parameter Δm2
23 and θ23 are another aim of the experiment. Future upgrades to T2K could yield measurement of the CP violation phase δ by comparing oscillations of neutrinos to those of antineutrinos.
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