Current status of the T2K experiment

Abstract

The T2K long-baseline neutrino-oscillationexperiment was started in January 2010 for the purpose of physics data-taking. Until the massive earthquake on March 11, 2011 in Japan, $1.43\times 10^{20}$ pot data were accumulated. In this data, 6 possible ${\nu }_e$ appearance candidates are found forexpected background of 1.5$\pm$0.3(syst.)if ${\sin }^{2}2{\theta }_{13}=0$ is assumed.The probability that 6 or more events can be observed for1.5$\pm$0.3 expected events is 7$\times 10^{-3}$,equivalent to 2.5$\sigma$ significance. This is the first indication of a ${\nu }_e$ appearance or, in other words, the first indication of a non-zero ${\sin }^{2}2{\theta }_{13}$.

Talk at "2nd International Conference on Particle Physics (ICPP-Istanbul II)",Istanbul, Turkey, June 20-25, 2011. 10 pages, 10 figures

References in corpus (3)

• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• Measurement of Neutrino Oscillation by the K2K Experiment
• Measurement of the neutrino mass splitting and flavor mixing by MINOS

Cited by in corpus (1)

• An incremental approach to unravel the neutrino mass hierarchy and CP violation with a long-baseline Superbeam for large ${\theta }_{13}$