Hadron Production Measurements for Long-Baseline Neutrino Beams

Long-baseline accelerator neutrino experiments rely on the neutrinos from the decays of hadrons produced in hadron-nucleus interactions. Uncertainties in the hadron production yields from these interactions dominate the neutrino flux uncertainties in these beams. This talk will review the currently available hadron production data that is relevant for accelerator beams. It will highlight recent results from CERN's NA61/SHINE experiment, which has produced measurements that strongly constrain the neutrino and anti-neutrino fluxes in the T2K experiment and is currently producing measurements to improve modeling of the fluxes for the Fermilab long-baseline neutrino program. The talk will also present the prospects for future hadron production measurements in NA61/SHINE and other projects