Speaker
Ms
Helen O'Keeffe
(Lancaster University)
Description
T2K is a long-baseline neutrino oscillation experiment in which a muon neutrino beam is produced at the J-PARC facility and detected by Super-Kamiokande, a water Cherenkov detector with a 22.5 kton fiducial mass, after traveling 295 km. Since 2010, T2K has accumulated 6.57e20 protons on target, which is 8% of the experimental goal. T2K has observed 120 numu event candidates, which show a clear disappearance oscillation pattern, and 28 nue event candidates, with which nue appearance was established. The measurement of nue appearance is partic- ularly important because it enables us to determine the delta_CP phase when theta_23 and theta_13 are known. Using the values of theta_23 determined by the T2K disappearance measurement and theta_13 measured by reactor nuebar disappearance measurements, T2K has obtained the first constraint on the delta_CP phase from a nue appearance measurement. In addition to this result, future prospects, including running with antineutrino-mode beam and continued analysis improvements, will also be shown.
Primary author
Ms
Helen O'Keeffe
(Lancaster University)
