T2K and Beyond

Abstract EN

This paper presents the state of the art of the T2K experiment and the measurements prospects for the incoming years.

After a brief description of the experiment, the most recent results will be illustrated.

The observation of the electron neutrino appearance in a muon neutrino beam and the new high-precision measurements of the mixing angle θ 13 by the reactor experiments have led to a reevaluation of the expected sensitivity to the oscillation parameters, relative to what was given in the original T2K proposal.

For this reason the new physics potential of T2K for 7.8 × 1 0 21 p.o.t.

and for data exposure 3 times larger than that expected to be reachable with accelerator and beam line upgrades in 2026 before the start of operation of the next generation of long-baseline neutrino oscillation experiments will also be described in the text.

In particular the last challenging scenario opens the door to the possibility of obtaining, under some conditions, a 3 σ measurement excluding sin ( δ C P ) = 0 .