Over the past decade compelling evidence has emerged that neutrinos have
non-zero masses and that neutrinos change from one flavour to another.
Intense neutrino beams generated by particle accelerators are now being
used in order to more precisely probe the spectrum of neutrino masses
This talk will focus on the Tokai-to-Kamioka (T2K) experiment, now under
construction in Japan, which will study a beam of muon neutrinos
produced at J-PARC on the east coast of Japan. With two neutrino
detectors, one located near the origin of the beam, and another detector
located 295 km away, T2K will look for the disappearance of muon
neutrinos and the appearance of electron neutrinos over a long distance.
T2K will begin taking data in 2009. The current status, physics
goals, and future measurement potential of T2K will be presented.