Speaker
Description
The Tokai-to-Kamioka (T2K) experiment uses high intensity beams of neutrinos and anti-neutrinos produced at the Japan Proton Accelerator Research Complex (J-PARC) to measure neutrino oscillations over a baseline of 295 km, and search for evidence of CP violation. Neutrinos come from in-flight decays of charged hadrons produced from interactions of 30 GeV protons in a long graphite target. The intrinsic challenges associated with accurate modelling of hadronic interactions that lead to neutrino production have been the primary motivation for the T2K Collaboration to develop a robust flux tuning approach for the J-PARC neutrino beam. The modelled flux prediction is tuned to external data from hadron-production experiments, notably including measurements collected by the NA61/SHINE experiment using a replica of the T2K target. A comprehensive summary of the T2K flux calculation method will be presented and active areas of development with scope for future systematic error improvement will be discussed.
