Neutrino CC0π Double Differential Cross-section on Hydrocarbon at T2K On-axis Detector

Abstract

Interactions through the quasi-elastic charged-current channel are the dominant interactions of neutrinos from long-baseline neutrino experiments. However, relatively large discrepancies have been observed between the measurements from various experiments (MiniBooNE, MINERvA, NOMAD). These lead to a large uncertainty in the interaction model and therefore on the measurement of neutrino oscillations. The Proton Module (PM) is a detector located on-axis in the T2K experiment at 280 m from the target, made uniquely from scintillator planes. The incident neutrino flux covers both the MiniBooNE energy region (≲ 2 GeV) and the higher energy region covered by NOMAD measurements. This makes the PM complementary to the ND280 off-axis detector that probes the lower energy region and hence the PM is ideally adapted to probe this apparent discrepancy in the 1 − 3 GeV region. However, having no magnetic field, only a flux-integrated measurement has been provided so far. In this Monte-Carlo (MC) study, we present first the muon momentum determination in the onaxis detector using the downstream iron module. We show then the first double differential CC0π neutrino cross-section MC study using muon angle and momentum observables.