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The T2K Experiment

T2K is a neutrino experiment designed to investigate how neutrinos change from one flavour to another as they travel (neutrino oscillations). An intense beam of muon neutrinos is generated at the J-PARC nuclear physics site on the East coast of Japan and directed across the country to the Super-Kamiokande neutrino detector in the mountains of western Japan. The beam is measured once before it leaves the J-PARC site, using the near detector ND280, and again at Super-K: the change in the measured intensity and composition of the beam is used to provide information on the properties of neutrinos.

Science Goals of T2K

• the search for CP violation in the neutrino sector
• the discovery of ν_μ → ν_e ( i.e. the confirmation that θ₁₃ > 0 )
• precision measurements of oscillation parameters in ν_μ disappearance
• a search for sterile components in ν_μ disappearance by observation of neutral-current events
• world-leading contributions to neutrino-nucleus cross-section measurements