Speaker
Description
The T2K experiment is a long-baseline neutrino oscillation experiment based in Japan, with the primary goal of measuring CP violation through comparing neutrino and antineutrino oscillations. The primary off-axis near detector, ND280, observes the neutrino beam before oscillation, and has the important role of constraining neutrino-nucleus interactions. This is a leading source of systematic uncertainty for current analyses, so constraining these is of even greater importance as the field moves to a high-precision era with Hyper-Kamiokande and DUNE. ND280 is composed of multiple sub-detectors; one of the two Fine-Grained Detectors (FGDs) features passive water layers, allowing for measurements of the cross section on water.
This poster presents an analysis for measuring the muon neutrino charged current single positive pion cross section on water. The analysis features a novel method for reconstructing the momentum of low energy pions, allowing access to increased regions of phase space. Combined with extra data doubling the statistics of the previous measurement, this allows for a differential measurement in four dimensions, including the kinematics of the outgoing pion.
