The T2K Long Baseline Neutrino Beam Experiment

T2K is a long baseline neutrino beam experiment scheduled to begin operation in 2009. The energy of the $\nu_{\mu}$ beam from JPARC and the distance (295 km) to the far detector (Super-Kamiokande) have been chosen to maximize sensitivity to $\nu_{e}$ appearance through neutrino oscillation. The expected sensitivity is an order of magnitude better than current experiments. Observation of $\nu_{\mu} \rightarrow \nu_{e}$ oscillations in the T2K beam would provide a non-zero measurement of $\theta_{13}$.