EMPHATIC: A proposed experiment to measure hadron scattering and productioncross sections for improved neutrino flux predictions

Understand

Hadron scattering and production uncertainties are a limiting systematic on accelerator and at-mospheric neutrino flux predictions.

• New hadron measurements are necessary for neutrino fluxpredictions with well-understood and reduced uncertainties.
• We propose a new compact experimentto measure hadron scattering and production cross sections at beam energies that are inaccessibleto currently operating experiments.
• These measurements can reduce the current 10% neutrino fluxuncertainties by an approximate factor of two.