Results from the HARP Experiment

Hadron production is a key ingredient in many aspects of ν physics. Precise prediction of atmospheric ν fluxes, characterization of accelerator ν beams, quantification of π production and capture for ν -factory designs, all of these would profit from hadron production measurements. HARP at the CERN PS was the first hadron production experiment designed on purpose to match all these requirements. It combines a large, full phase space acceptance with low systematic errors and high statistics. HARP was operated in the range from 3 GeV to 15 GeV. We briefly describe here the most recent results.