Speaker
Description
The Tokai-to-Kamioka (T2K) experiment is a long-baseline neutrino experiment. T2K obtained results that exclude the CP conservation with a 90% confidence level so far. Toward more precise measurements of the oscillation parameters, T2K experiment recently started operation of upgraded near detectors to further reduce major systematic errors on the neutrino-nucleus interaction. An upstream part of the near detector complex, ND280, was replaced with three detectors: the Super Fine-Grained Detector (SuperFGD), two High-Angle TPCs (HATs), and Time of Flight detectors (ToFs). SuperFGD is a novel target tracker which consists of about two million plastic scintillator cubes packed in about 2 m $\times$ 2 m $\times$ 0.6 m dimension. Scintillation light from the cube is read out by about 56 thousand channels from three directions through wavelength-shifting fibers and photo sensors. It provides 3D track reconstruction, 4 phi angular acceptance, calorimetry, and detection capability of neutrons and low energy protons. We report detector design, construction, operation status and its performances from the physics run with a full detector starting since June 2024.
| Neutrino Properties | No |
|---|---|
| Neutrino Telescopes & Multi-messenger | No |
| Neutrino Theory & Cosmology | No |
| Data Science and Detector R&D | Yes, it is the most relevant topic |
