Abstract:

T2K (Tokai to Kamioka) is a long baseline neutrino experiment from the newly built 30GeV proton accelerator at J-PARC in Tokai to Super-Kamiokande detector in Kamioka. The goal is to study numu->nue appearance to observe non-zero lepton mixing angle theta_13 and to study the numu disappearance to precisely measure the mixing angle theta_23. The J-PARC accelerator was commissioned in 2008, and the T2K neutrino beamline was successfully commissioned in April/May 2009. Construction and installation of the near detector is under way to be ready for the physics run in December 2009 or January 2010. In this talk, I will describe the T2K experiment and its status, including the commissioning result of the beamline and the construction of the near detector and their beam test.