Future Needs in Hadronic Production Measurements

Interactions of energetic particles on target nuclei producing secondary particles are important for fundamental and related Physics research. Current simulation codes rely upon poorly measured results from the past. While current neutrino experiments, both atmospheric and accelerator based, rely upon MIPP and pion production measurements which are poorly known and dominate their errors. The goal for the future upgrade MIPP experiment is to dramatically improve these measurements. It is not only of interest to neutrino experiments, but also for designing hadronic calorimeters for the the International Linear Collider which must achieve unprecedented resolutions for reaching their stated physics goals.