Measuring neutrino-induced exclusive charge-current final states on hydrogen at T2K

TL;DR

This paper presents a novel method to isolate neutrino interactions on hydrogen within composite targets, enabling more accurate measurements of fundamental neutrino-nucleon interactions free from nuclear effects, using T2K data.

Contribution

It introduces a symmetry-based technique to extract hydrogen interactions and provides an updated measurement of specific charged-current final states on hydrogen.

Findings

Successful isolation of hydrogen interactions using symmetry methods

Updated measurement of exclusive charged-current muon, proton, pion final states

Reduction of nuclear effects in neutrino interaction analysis

Abstract

By taking advantage of symmetries with respect to the plane containing the directions of the neutrino and outgoing lepton, it is possible to isolate neutrino interactions on hydrogen in composite nuclear targets. This technique enables us to study the `primary' neutrino-nucleon interaction and therefore gain access to fundamental model parameters free from nuclear effects. Using T2K Monte Carlo equivalent to $\sim7\times10^{21}$ POT, we present an update on the measurement of the exclusive charged-current $\mu^-$, p, $\pi^+$ final state on hydrogen.