Double differential production cross-section of positive pions, for 585 MeV protons on Hydrogen. Energy spectra at 5 different laboratory angles, 22.5° (green), 45° (blue), 60° (cyan), 90° (purple) and 135° (gold). The spectra are scaled by a factor of 3. The right plot is with the latest FLUKA improvements, the left one with previous versions. Symbols: experimental data as measured in [156].