Near detectors for neutrino physics at T2K and Hyper-Kamiokande
Task 2.1: Characterization of the new detector technologies of the ND280 Upgrade. We will characterize the off-axis
Near Detector and insure its stable operation, bridging the T2K and Hyper-K eras
Task 2.2: Definition of Hyper-K Near Detector strategy, including IWCD and ND280. ND280 and IWCD are highly
complementary, and both are needed to reach Hyper-K goals. Their combination will allow us to measure wrong-sign
components, cross-sections on Carbon and Oxygen, neutrino energy resolution and model dependency. A strategy to
timely combine results from IWCD and ND280 will be developed within this WP to maximize the impact of early Hyper-
K CPV measurements.
Task 2.3: Neutrino cross-section measurements. Exploit the Near Detector upgrade data to advance our understanding
of neutrino-nucleus cross-sections, contributing to forming students and postdocs. The ND280 upgrade data will allownew measurements of the hadronic part of neutrino interactions, helping develop sophisticated nuclear models in event
generators to reduce neutrino interaction systematic uncertainties.
Task 2.4 Near Detectors inputs to oscillation analyses. With the ND280 Upgrade, the kinematics of emitted protons,
neutrons, and pions will become available, allowing a further reduction of systematic uncertainties for T2K and Hyper-
Kamiokande. The inclusion of these additional samples from ND280 Upgrade will be done with the development of
new, more sophisticated fitting tools, that will then be extended to include inputs from IWCD.