The T2K experiment

TLDR

The T2K experiment is a long baseline neutrino oscillation experiment. The experiment aims to measure the mixing angle θ13 via νe appearance, precisely determine Δm²₂₃₂ and sin²2θ₂₃ through νμ disappearance, and conduct cross‑section studies and sterile neutrino searches. It employs an intense proton beam from J‑PARC to produce a neutrino beamline feeding a near detector complex (ND280) and a far detector (Super‑Kamiokande) 295 km downstream.

Abstract

The T2K experiment is a long baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle θ13 by observing νe appearance in a νμ beam. It also aims to make a precision measurement of the known oscillation parameters, Δm232 and sin22θ23, via νμ disappearance studies. Other goals of the experiment include various neutrino cross-section measurements and sterile neutrino searches. The experiment uses an intense proton beam generated by the J-PARC accelerator in Tokai, Japan, and is composed of a neutrino beamline, a near detector complex (ND280), and a far detector (Super-Kamiokande) located 295 km away from J-PARC. This paper provides a comprehensive review of the instrumentation aspect of the T2K experiment and a summary of the vital information for each subsystem.